Differences in Colour, Manufacturer, and Layout in the Center Pedestal

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There are several panels that make up the center pedestal, main instrument panel, and overhead in the Boeing 737 aircraft. Most of the panels are required by international law, and a carrier cannot fly if certain panels do not function correctly.

Although the aviation regulations require aircraft to have certain panels, there are panels that are airline specific. These panels are chosen when the aircraft is ordered from Boeing, or they may be installed at a later on. Similar to automobiles, there are a number of manufacturers of aviation panels and each panel, although having identical functionality may differ slightly.

All high-end simulators replicate the panels required by the authorities, and enthusiasts often fixate on a number of supposed issues. Namely:

(i)         The colour of the panel and lightplate;

(ii)        The position of the panel in the center pedestal;

(iii)       The backlighting of the lightplate (bulbs verses LEDs);

(iv)       The manufacturer of the panel, and;

(v)        The aesthetic condition of the lightplate.

Although seemingly important to a cockpit builder, to the casual observer, or indeed to many pilots, these attributes are of little consequence.  Nevertheless, it's understandable to a newcomer that all panels in the 737 Next Generation are identical between all aircraft.

Whilst it's true that all airlines must meet aviation standards for the type of operation they fly, the panel manufacturer and where in the pedestal the panel is located is at the discretion of the airline.  Furthermore, it's not uncommon to observe older style panels mixed with modern panels and to see lightplates that are illuminated by bulbs and LEDs side by side.

Note that some of this information probably pertains more to older Next Generation 737s than to the latest Next Generation released from Boeing.  I use the word 'panel' to denote an avionics module.

Colour of Lightplates

The official colour shade used by Boeing is Federal Standard 5956 36440 (light gull grey).  However, OEM part manufacturers may use slightly different colour hues.  For example, IPECO use British Standard 381C-632 (dark admiralty grey) and Gables use RAL 7011.  This said, often an airline will 'touch up' a lightplate that is damaged or faded - this introduces a further colour variant. 

For example, a lightplate I acquired from a 737-500 airframe revealed three differing shades of grey beneath the final top coat of paint.  This is not to mention that, depending on the manufacturer of the lightplate, the final coat of paint may be matt, semi-matt or gloss.

From the perspective of an engineer, the colour (and to a certain extent aesthetic condition) is unimportant when replacing a defective part with another.  Time spent in the hanger equates to a loss in revenue by the airline.  Therefore turn-around times are as brief as possible and keeping an aircraft on the ground while procuring the correct shade of Boeing grey does not enter the equation.

Position of Panels in the Center Pedestal

image copyright chris brady

Boeing recommends a more or less standard position for the essential panels in the center pedestal (NAV, COM, ADF, ASP, rudder trim, door lock and panel flood), however, the location of the panels is often altered by the receiving airline, and is to a certain extent is determined by what other panels are installed to the pedestal.  Areas (holes) in the pedestal not used by a panel are covered over with a grey-coloured metal blank.

LEFT:  This photograph of the center pedestal of a Boeing 737-500 was taken in 2016.  The aircraft is a freighter converted from a passenger aircraft.  Apart from the older style ACP panels, note the disparate displays between the NAV and COM radios.  Also note the position of the ADF radios and some of the other panels; they do not conform to what is usually thought of as a standard set-out.  Finally, note the scratches on the pedestal and on some of the panels and lightplates - they hardly look new (image copyright Chris Brady).

Panels are manufactured by several companies, and often there appearance will differ slightly between manufacturer, although the panel's functionality will be identical.  The airline more often than not chooses which panel is used, and often the decision is biased by the cost of the panel.  Therefore, it's not uncommon to observe several airframes of a similar age with differing panels positioned in different areas of the center pedestal.

Panel Condition

Enthusiasts pride themselves in having a simulator that looks brand new.  However, in the real world a Level D simulator or flight deck rarely looks new after entering service.  Panels can be soiled and paint is chipped and scratched, and depending on age, some lightplates are faded to due to the high UV environment that is present in a flight deck.

So where am I going with this?  Enthusiasts strive to match their panels with those observed in a real airliner, however, more often than not this information comes from photographs distributed by Boeing Corporation, which nearly always depict panels in a standard position, especially in relation to the center pedestal. 

The variables noted by enthusiasts should not cause consternation, as real aircraft show similar variation.  Remember that in the real aircraft, colour, manufacturer, and to a certain extent aesthetic condition is not important - functionality is.

SISMO Soluciones - Avionics Review: My Negative Experience

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I initially wasn't going to document my negative experience with Sismo Soluciones as many simmers use SISMO products and are fiercely loyal to this company.  This post has sat unpublished for close to 10 months until a friend convinced me otherwise, saying that bad reviews can be beneficial, especially to new simmers who are undecided on what and whom to purchase from.

This is the first negative review I have written and in doing so realise that I will no doubt annoy some people, especially loyal SISMO customers.  My aim is not to annoy, intimidate or create malicious rumours.  Rather, it is to share with others my factual experience with this company. Due to the negative nature of this review, it WILL NOT be posted to any forum.

I purchased the following units from SISMO:

  • ADF radios (2)

  • Transponder / ATC radio

  • Audio Control Panel 

  • rudder trim module

At the time, I was using Sim Avionics as my avionics suite.

I had issues with: aesthetics, quality assurance and the use of the SC Pascal script.  

When you initially look at the modules offered by SISMO, they do look attractive; however, it's often the small things that count and the panels made by SISMO lack the attention to detail and quality expected.

  • This article is a little different from previous articles.  I've made a basic review of the modules, then discussed the issues I had in respect to with the panels/modules.  Finally I've discussed company.

Please note that I use the word panels/modules interchangeably.

Overall Module Construction and Appearance

The modules are constructed from acrylic and painted in Boeing grey.  The use of CNC machining produces a crisp finish resulting in cut-out lettering that is well defined.  This enables the lettering to appear very crisp when the panels are back it.  The buttons and switches used in the panels are machine injection moulded and secured to rotary stems via two small grub screws. The electronics are not sealed pr boxed (such as in CP Flight) but are visible.  DZUS fasteners are not included although holes have been drilled in the appropriate position (although these holes are too small to fit genuine DZUS fasteners).  The backing plate is made from plastic.

Paint Work

The paint work used by SISMO is not of a high quality.  The paint, eith minimal use of the panel, wears thin on the panel beneath the knobs and switches.  The paint also chips very easily and is not evenly applied to include the side of the unit.  Although I don’t know how many layers of paint have been used, I’d suggest it’s minimal.  Minimal paint saves time and expense and does not lend itself to high quality or longevity.

Integrated Backlighting (IBL)

SISMO ADF unit & FDS NAV1 unit.  Note the difference in backlighting (not seven-segmented displays) and module colour between the two units.  FDS use real aircraft bulbs

SISMO does not utilise real aircraft bulbs for backlighting.  Rather they use a number of strategically placed LED lights.

There are several arguments for and against the use of bulbs and LEDs.  The former provide a realistic throw of light at the correct colour temperature, while LED’s are usually more pin point, require less power to run, and usually appear colder in colour temperature.

The Backlighting on the SISMO modules is reasonable; however there is not an even throw of light across the rear of the panel to allow complete illumination of all cut out lettering.  The panel also does use a light skirt to inhibit stray light from illuminating the outer edge of the modules  The backlighting is powered by 12 volts.  The colour of the LEDS is amber yellow or warm orange.

I had an issue with two LED lights; The LED lights stopped working.  SISMO informed me I would have to repair this myself.  Shortly thereafter, a third LED light failed. This suggests that SISMO may have a quality issue in relation to the LEDS they use (at least in the batch I received).  I have little doubt that the LEDS are inexpensively sourced from China (ROC).

Electronics

The upper panel of the module is attached to the electronic circuitry within the lower section by a backing plate made from plastic.  It should be constructed from metal to aid in strength.  The electronics appear substantial and to be well built (appearance only as I did not bench test the electronics). 

System and I/O Cards

The modules are not standalone devices.  Depending upon your requirements, the modules require connection to various system and sim cards for complete operation.  As an example, to operate the ADF units and rudder trim module requires three GIC connection cards, an Ethernet motherboard card, and three servo-daughter cards – seven cards in total!  

 

figure 1: sismo card setup. there are lot of cards

 

Although there is nothing wrong with this method of operation, it does pose a challenge to find a suitable location to mount the cards.  The cards appear to be constructed to a high standard and are very solid; they do not feel or look like cheap Chinese-made cards.

I’ve included, for interest, a schematic wiring and card diagram of the module set-up for the Captain-side ADF radio. (click the image to enlarge the picture). 

The main Ethernet mother board requires a 5 volt power supply.

Wiring

SISMO provides you the opportunity to either use their prefabricated flat cabling or to wire everything yourself.  I choose the former and this saved a lot of time and frustration (wiring and soldering).  The flat cable packs are each fitted with heavy duty plastic clips for attachment to the cards.  Connection is straightforward and SISMO provide large A3 colour wiring sheets so you know exactly what wire plugs into what card.

If you decide to use the flat cabling, it’s necessary to include in your system a number of additional cards.  These cards, called  Generic Interface Cards (GIC) act as joiners between the different system cards used by the panels. The size of each GIC card is little larger than a credit card. 

SISMO panels with flat cabling.  There is a lot of cables that need to connect with several interface and GIC cards

Too Many Cards

The amount of wiring and number of cards needed to use SISMO products is ridiculous! 

Using four panels, the interior of the center pedestal is a mass of wires leading to and from various interface cards.  There are far better and easier alternatives available from other manufacturers.  

The Power of Ethernet

SISMO’s product range utilises Ethernet technology rather than USB; this has many advantages over the use of USB. 

According to SISMO literature: 'USB was not designed to carry the volume of information necessary for flight simulation. Although USB is practicable and does work very well, it can on occasion malfunction (drop out), or slow the operation of the intended device by creating a bottleneck for information flow.  Ethernet, on the other hand, has been designed at the onset to allow for high information flows ensuring fast and consistent transfer of information'.

An Ethernet cable is required to link the main Ethernet mother board, either directly to the computer or to a switch (if using two or more networked computers).

The two tabs overlap the OEM DZUS rails.  You must cut the DZUS rails to allow the module to fit the pedestal

Real B737 Center Pedestal - Not Drop & Fly

An important point to note is that the ADF and ATC radios will not drop directly onto the DZUS rails fitted within a real B737 center pedestal. 

SISMO modules have been designed so that the electronic boards, mounted directly beneath the panel, are flush to the edge of the panel.  What this means is that the panel cannot be placed directly onto a rail, as the electronics board abuts the edge of the rails. 

To allow correct placement in a genuine center pedestal requires that the DZUS rails be cut in the appropriate position.

All the other SISMO modules, other than the ATC and ADF modules drop onto the rails without an issue.  I'm unsure why this manufacturing inconsistency has occurred.

Misleading Information

During my initial research, I asked SISMO if their panels fitted a genuine center pedestal.  I also queried if OEM DZUS fasteners could be used.  Juan Ma (sales) stated that all SISMO panels were DZUS compliant and did fit genuine DZUS fasteners; however, when I told SISMO they didn't fit the rails, Juan Ma claimed he had misunderstood my question due to his poor understanding of the English language - he meant to say no rather than yes.

To utilise OEM DZUS fasteners, you will need to enlarge the attachment holes in each of the panels to enable the fastener to fit into the hole.  A word of caution here – SISMO use plastic backing boards which will crack easily if you are overzealous with a power drill (this is why I suggested, earlier in this article,  that metal be used.

Communication and Support

Support for SISMO is either directly via e-mail or by their dedicated forum.  All e-mails are answered quickly (in English or Spanish). JuanMa and Cristina answered all my e-mails in a professional level.  They are courteous, exceptionally patient, and very helpful; both strive to help you as much as they can.  

SISMO Modules - A Closer Inspection

ADF Radio Module

Initially, you’re impressed when you look at the ADF panels.  The seven segment displays, illuminated in either amber yellow or warm orange are easy to read, well lit, and appear similar to the displays you would see in a real aircraft. 

As you turn the rotary knobs to change the frequencies there is no catching as the knobs are turned, and the push-to-activate buttons move freely.  They do not stick in the down position when depressed. 

Problems

One small issue I immediately noticed, was that the tinted window plate which sits over the frequency display is not secured; as opposed to other manufacturer’s modules that incorporate the plate into the actual construction of the panel.  If you invert the modules the cover plate will fall out of the recess.  I decided this wasn’t a problem; how often are simulators inverted, and securing the plate is an easy exercise.  A small piece of double-side tape is all that is needed to secure the plate in place.

My problems began after roughly four hours of use.  The frequency push-to-activate button was temperamental and would not allow the stand-by and active frequency to be changed with one push; several pushes were required.   The problem was intermittent, but investigation suggested an issue with the clicking mechanism or the button itself.

The next issue to develop was with the rotary knob; turning the knob caused the frequencies to jump digits.  As with the push-to-activate button, the problem was intermittent but, the problem was rectified when you closed and reopened the SC Pascal script.  Perhaps the script needed tweaking.

Knobs and Switches - Poor Quality

I was disappointed with quality of the switches and knobs used on the panel.  The two ADF-ANT switches are made from hand injected low quality plastic; several small injection holes in the plastic are easily seen.   For the minor cost involved, high quality machine-injected knobs could have been manufactured.  

Each of the ADF-ANT switches slides onto and over the plastic circular shaft of the rotary mechanism.  The knob is then secured to the shaft by two grub screws each side of the knob.  It doesn’t take too long for the grub screws to begin to loose their grip on the shaft with resultant slippage of the knob.

Other companies have solved this potential problem by using D-shaped shafts or higher quality rotary switches incorporating metal shafts instead of plastic.  Knobs manufactured by high-end companies use stainless steel shafts and stainless grub screws that screw into stainless sleeves.

  • My rating 4/10

Audio Control Panel (ACP/ASP)

SISMO ACP unit does not look realistic with inexpensive poorly moulded buttons and very stark backlighting.  Note that some of the rectangular buttons are not in alignment.  This unit has been constructed with very poor attention to detail.  Note, the black knob is not a SISMO knob but comes from a 737CL (OEM)

The Audio Control Panel (ACP/ASP) replicates the audio system of the B737 (navigation radios, etc).  The ACP occupies a large piece of real estate in the center pedestal and the ability to turn on and off navigation audio sounds should not be dismissed.

The main ACP switch is of similar construction to the ADF-ANT switches on the ADF module; it is poor quality with injection holes readily observed.  The clear push buttons used to turn on and off the various audio sounds are of low quality.  The buttons are fashioned from clear acrylic and lack detail and definition.  

I was disappointed, that when the ACP unit was fitted onto the pedestal, light from the backlighting seeps along the edge of the panel (to stop this I applied masking tape to the side of the panel to create a light skirt.  I also noted that some of the buttons are not accurately aligned with one another. 

Often it’s the small things that count and push a product to the next level. Clearly this is not a mantra that SISMO adhere to.

I was not impressed with the quality and attention to detail on the SISMO ACP unit; therefore, have decided to convert two real B737-500 ACP panels to simulator use.

  • My rating 2-10

Rudder Trim Module

The rudder module incorporates a large knob that is center-spring loaded.  The knob allows the rudder to be deflected in either direction and be recorded in degrees of offset on the scale.  The movement of the defection needle is made possible with the use of small servo motor fitted beneath the module and powered by 12 volts.

SISMO rudder trim module.  Note the very poor moulding on the knob and colour shift with lighting

The rudder trim knob is poorly moulded and clearly portrays hollow holes left over from the injection process.  For those searching for aesthetics, replacement using a real B737 knob is very easy (if you can find a real knob).

The trim needle, at least on my module, is a little lop-sided.  As with the ACP module, stray light from the LED backlighting is readily seen around the edge of the panel.  Like other SISMO panels, there is no inclusion of a light skirt to stop stray light.

The remainder of the module is aesthetically pleasing.

The rudder trim is one of the modules that is necessary to complete a center pedestal, but unless one is regularly flying with one engine, the module is seldom used.  Therefore; this module from SISMO, even with the irregularities, is a reasonably priced alliterative to some of the more expensive counterparts available (provided a replacement knob is used and light skirt is fabricated).

  • My rating 5-10

ATC (Transponder) Module

This is one of the better produced modules from SISMO. 

The switches and knobs are manufactured to a quality at least equal to what other companies produce.  There are no injection holes in the knobs, and turning the frequency knob is very smooth when altering frequencies. The digital read out is crisp, yellow amber in colour, and the tinted window, which falls out easily on the ADF panel, seems to be more secure (although it is the same drop in type).   As with the ADF panel, this panel will require you to cut the DZUS rails if you are using an OEM 737 center pedestal.

As a script was never supplied with this module (SISMO did not send it), I cannot provide information to how well it operated.  

  • My rating based solely on appearance is 7/8-10

Reliability and Performance - Software and Modules

Software - SC Pascal Scripts

The modules require SC-Pascal scripts to be installed on the simulator computer. 

The basic script is downloaded from the SISMO website.  A further customised script is needed to configure the modules to the avionics software package you are using (Sim Avionics, Project magenta, ProSim737, Orion, etc) and FSX.  SISMO write the script dedicated to the panels you are using.  To activate the panels you run the executable file when you open a flight session.

SC-Pascal scripts are completely new to me, but a little research indicates that the script is used as a software interface between the actual functionality of the various panels, FSUIPC and simulator software.

Once the scripts are installed and configured correctly, a folder is created in which is stored the config.ini file and the executable script.  The folder and files can be named and stored anywhere on your computer system.   The panels are turned on by activating the executable script (.exe).  

As an option, direct access to the script can be made by adding the executable command to the auto start folder of your computer.  This option automatically starts the modules when the computer is turned on.  The script then runs in stand-by mode until flight simulator is turned on.  This option saves time and repetition by not having to turn on the executable file.

As SISMO utilises Ethernet technology, the various IP addresses of the computer (s) you are using need to be correctly configured to allow communication between the computer and the panels.  This is basic networking knowledge and is relatively easy to learn.

Once the software is configured, the software and modules should function flawlessly.  

Script Problems

I did have some issues with the SC Pascal script freezing when it was initiated.  The script also caused some issues which appeared to cause the ADF radios to incorrectly display frequencies.  To Juan Ma's credit, he did tweak the script, however, the problems remained.

As I know nothing about SC Pascal scripts, I don't know with certainty whether the problems experienced were caused by a script issue, hardware issue, or something particular to my system.  If push comes to shove, my guess is that the problem lay with the SC Pascal script.

I try to keep things simple in my simulator, and running multiple scripts for various panels through several interface cards doesn't exactly fit into this ethos. 

It would be inaccurate to state that SC Pascal scripts don't work, because there are many enthusiasts who have them operating perfectly.  But, I am not one of these individuals.

Note that I was using Sim Avionics.  If using ProSim737 there is an option to use a script or direct drivers within ProSim737.

Quick List - Pros and Cons

PROS

  • Fairly accurate 1:1 ratio (or close to)

  • Easy to install and use software (knowledge of SC Pascal required if altering software)

  • Laser cut and stenciled lettering

  • Ethernet technology

CONS

  • Plastic shafts on ADF-ANT knobs (should be metal/stainless)

  • Poor quality knobs and switches on ADF, ACP and Rudder Trim module

  • Average light coverage for LED backlighting

  • ADF and ATC modules don't drop directly onto DZUS rails; the rails must be cut.

  • Large number of cards needed for operation

  • Not DZUS complaint (requires existing holes to be enlarged)

  • Plastic backing plate on panels (easily damaged when enlarging holes for DZUS fasteners)

  • Light seepage around edge of some panels from backlighting (no light skirt)

  • SC Pascal script troublesome and works intermittently.

  • Poor quality paint work

Considering the above, the panels are expensive.

Final Call

The modules are ideal for the budget-conscious flight simmer.  This said, a potential user must have knowledge to troubleshoot problems.

The lack of quality knobs, switches and poor attention to detail detract aesthetically, while the large number of cards that need to be installed can make installation challenging.  Three failing LEDS and problems with the frequency selector switch on the ADF radio panel may point to quality assurance issues.  The use of Ethernet over USB is highly commended and may reduce information bottlenecks.

My rating for the software is 4/10 (The supplied scripts didn't work with my system, which at that time was Sim Avionics and not ProSim737).

My overall rating for the modules is 3/4/5-10 (based on fitting issues, quality of knobs, poor attention to detail, poor painting, no light skirts and temperamental frequency selection switches on ADF).

Please note that this review is my opinion only and is not endorsed.

POST SCRIPT: - July 15, 2012 - RETURNED MODULES TO SISMO REQUESTING REFUND

I have returned all the panelss, cards and wiring  o SISMO for a full refund (minus freight).

Initially, SISMO offered me 10% of the value of the products purchased (this included the interface cards that had never been used).  

SISMO stated that the return period had been exceeded, and any products returned would be treated as second hand units.  It didn’t matter that SISMO had not, at that time, sent all the appropriate SC Pascal scripts to ensure correct operation of the modules.  

The writing of the SC Pascal scripts was delayed close on 2 months after I received the modules, and when received, the scripts didn't funcyion as intended.  Excuses were; staff holidays, workloads, Easter break, and awaiting confirmation from another company to facilitate operation.  

Upon receipt of the returned items, SISMO claimed that many of my issues were incorrect or not relevant.

  • They claimed that the modules had been damaged.

  • They stated that I had broken the LEDS (I told them the LEDS were not working when I received the parcel).

  • They claimed I had disassembled the units and damaged the paint and screws.

  • They claimed I had re-painted portions of the units.

  • They claimed sticky plaster was attached to one of the units. (this is correct as I used tape to secure the wiring & also to create a trial light skirt)

  • They deducted from my refund, Spanish import duty and inspection fees (returned the goods to Spain).

  • They claimed I did not include paperwork (which I did). 

  • They stated that as the ATC RADIO module was discontinued, a refund was not possible.  At the time of purchase they did not inform me this panel was discontinued.

I'm not going to go into a long account to what has transgressed.  But, I will say that this company cannot be trusted…..They promise the world to you, but if you aren't happy with the products, they provide every excuse possible to NOT provide an adequate and reasonable refund.

For example, when I reported the failure of the LEDS to SISMO, their response was 'they worked when they left the shop'.  They did offer to replace the LEDS but, at my shipping expense (which was expensive).  They also offered, because of the inconvenience caused, a discount on further purchases.

It should also be noted, that in my initial correspondence with SISMO, I asked whether their panels would drop directly into an OEM B737 center pedestal.  Juan Ma stated 'YES'.  However, on receipt it was discovered that the modules were too large to fit directly onto the pedestal DZUS rails.  I queried Juan Ma from SISMO on this; he stated that it was a language misunderstanding.

Juan Ma understood perfect English when it came to avoiding a refund of purchase money.

Legislation, PayPal and Delays

Spanish legislation states that every purchase has a 7 day cooling off period, in which a return and refund can be made.  PayPal policy states you have 45 days in which to make a claim.  EU legislation states that refunds are possible if items do not function correctly - within a set time frame.

Without a working script for Sim Avionics (which took two months to receiveve), how can testing of panels occur.  Because of the approximate two month delay on sending operating scripts to me, all options available to me had expired.

I cannot help but think that SISMO delayed the sending of the scripts so as to provide a reason for NOT refunding 100% of the purchase price.

SISMO Solicones appears to be a company that will ONLY support and stand by their products if you continue to use their products and not complain, or attempt to return them.

If you ask for a refund due to faulty components, components that don't function, or scripts that don't function correctly, then expect NOTHING, or at the very least, a minimal refund (and you will have to fight to get this refund). 

What you can expect from SISMO, is e-mail after e-mail informing you that you have no right to a refund, that you have damaged the items, and that you did not follow SISMO policies, etc, etc.

After many e-mails, I succeeded in gaining a E400 Euro refund for an initial E1400 Euro outlay.

I'm sure there are many happy customers using SISMO products; however, I am not one. I do not recommend SISMO Solicones. 

Their products are of poor quality.  The attention to detail that is required (and expected) when replicating an aircraft panel is very poor.  And finally, their customer service is dismal if you are seeking to return an item.

In my opinion, it's VITAL that a company standby and support their product-line, and this includes refunds if the product (for whatever reason) is not suitable with your simulator set-up.

If you search the Internet, you will find very few comments regarding SISMO, other than company endorsed reviews on forums that are supported by manufacturers and resellers.

If you are searching for quality avionics panels, look no further than Flight Deck Solutions or CP Flight. 

These two companies are reliable, produce quality products and provide exceptional after sales service.  They also offer a refund if not 100% satisfied with their product.  Whatever you do, don’t spend your money on inferior products from SISMO! (my opinion only).

  • This review is rather negative towards SISMO Soluciones.  I have 'toned down' my anger to this company considerably in an attempt to produce a balanced and accurate review.  Please understand that this is my experience with this company.  Your experience may well differ. 

Feel welcome to make comments, either good or bad in the comments section.

Updated and Amended 15 April 2020

Update

on 2015-08-27 00:15 by FLAPS 2 APPROACH

I wasn't expecting such a response to this post.  Nor was I expecting SISMO Soluciones to link this negative review to their website, face book account, and on several other prominent forums.

Whether an individual likes or dislikes a product based on aesthetics and functionality is subjective; what I dislike, another simmer may like very much.  I know several simmers that use SISMO and are very happy with the product. 

My main 'gripe' with SISMO, apart from poorly produced products, is their no questions non-return option should you be in the former (dislike) category.

Whatever transpired between myself and SISMO is water under the bridge.  If a company stands by their products they offer a no questions return policy.

I have since heard, based upon this review that SISMO may be taking legal action against me for what I have written.  I have told the story as it unfolded and refuse to retract what has been written on an independent and non-industry supported website. 

  • This is one of the purposes for this site - unbiased and honest appraisal of products I have used.

Thanks for your lively comments.   Cheers

B737 Blanking Plates - Cover That Unsightly Gap

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OEM blanking plates complete with DZUS fasteners recently removed from a scrapped 737 - the dirt and dust is still on them!  Note three differing sizes - 1" 2" and 4"

No matter what style of simulator you are using or have constructed, you will most likely have a center pedestal installed.  The pedestal will be either a two-bay or three-bay type and be a genuine aviation part incorporating DZUS fastener rails, or a reproduction unit manufactured from wood, metal or plastic.

The two-bay pedestals, once allotted the standard Boeing avionics suite, usually have no  space remaining for additional avionics; however, the three-bay pedestals have substantially more 'real estate' and often gaps are remaining that are not filled with avionics.  Most enthusiasts either leave this space open which looks very unsightly, or manufacture their own plate to cover the gap.

OEM Blanking Plates

Why not use the real part….  

Boeing produces several blanking plates in varying sizes to be used to cover any 'gaps' not used in the center pedestal, forward and aft overhead panel, or Main Instrument Panel (MIP).  These plates are machine-grade light weight steel (or aluminum), are painted Boeing grey, and incorporate the required number of DZUS fasteners for attachment to DZUS rails.  The plates come in a variety of sizes with 1 inch, 2 inch, and 4 inch being the norm.

These plates are inexpensive and usually retail between $5.00 - $20.00 USD, and not only fulfill the task of covering an unsightly gap, but are easy to install, come pre-cut, are painted the right colour, and usually have DZUS fasteners attached to them. 

If not using real DZUS rails and your pedestal in made from wood or plastic, then it’s relatively easy to remove the fasteners and replace them with reproduction screw-type DZUS available from GLB Products.

Most aircraft wrecking yards carry these plates, as airlines regularly purchase them.  Failing this E-Bay often has blanking plates for sale. 

Navigation and Multi-COMM Radios by Flight Deck Solutions - Review

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Navigation and M-COMM radio.  Note the even backlighting and well defined seven -segmented displays.  Also note DZUS connectors

The avionics that are used in the center pedestal are important; they are used regularly, are always visible, must function correctly, and be robust to sustain long use.

This review will discuss the radios produced by Flight Deck Solutions (FDS). In particular, the navigation (NAV 1/2), multi-comm (M-COMM) and ADF (1/2) communication radios.

The navigation and M-COMM radios are USB driven, while the ADF radios use Ethernet.

  • For brevity, I’ll discuss the construction of the panels together, as each of the panels has been constructed and along similar grounds, and functions similarly.

The navigation radio is a single channel radio unit designed to handle navigation frequency selection and management.

The M-COMM is a multi-channel communications radio that replicates the latest radio used in the Next Generation airframe.  The radio encapsulates VHF 1, VHF 2 and VHF 3, HF, HF2 and AM.  For simulation purposes, the M-COMM is an advantage to those who only wish to purchase one communications radio, rather than the two radios (COM 1 and COM 2) traditionally used.

fds ADF radio with rear of radio in background.  The finish of the panel is above par.  Note that the ADF/ANT and OFF/ON switches can be toggled, but are not functional

Appearance and Construction

The panels are constructed using the same technique that FDS to fabricate their Main Instrument Panel (MIP).  

Each upper panel is made from CNC machined acrylic which produces a very crisp finish and allows any stencilled letter cut-outs to be very well defined.  Each of the radios use a dual concentric rotary encoder with a stainless steel stem.

High Quality

The knobs and switches, which are custom machine injected, are true to life and are tactile in feel.  As you click through the frequencies the movement is stable and well defined.  There is no catching from the encoder as the knobs are turned.  The push keys are plastic moulded, back-lit and work flawlessly; they do not stick in the down position when depressed, and click back into position when pressure is released.  The frequency displays are seven-segmented display and are very easy to read.  

The colours of the digits are amber yellow for the navigation and ADF radios and warm white for the M-COMM radio.  The seven segmented display in the ADF radio is a slightly different font to the those in the navigation and M-COMM radios.  The colour is also a tad more orange in hue.  Although slightly different, this doesn’t distract from the overall appearance.

Layer cake design to accommodate the circuitry and the easy to use push clips to connect 5 Volt power (IBL).  Also, note that the circuitry board is not flush to the edge of the panel, enabling the radio to drop easily onto DZUS rails (drop & fly).  Also note the inclusion of OEM DZUS fasteners

Construction

The electronic components needed for the radios to function are contained within each panel. 

As such, The radios do not require interfacing with an interface card and are literally ‘plug and fly’.   The decision by FDS to incorporate all the circuitry within the panels minimises the wiring required, and the problem in finding space to attach an interface card.  

Depending on the radio, there are up to three layers that various electronic circuitry is attached, that includes integrated backlighting (IBL).  The front panel of the radio is backed by a piece of grey-coloured aluminium that adds strength to the unit and assists to dissipate heat from the 5 volt bulbs used to backlight the panel.  An electronics friend had a look at the electronics and was impressed with quality of the electronics board.  

What this amounts to is a well presented avionics panel that accurately replicates the radio in the Boeing 737 aircraft.  The radios are 1:1 in size.

Painting and Finish

All panels fabricated by Flight Deck Solutions, which includes the radios, are professionally painted in Boeing grey.  

Rather than one coat of paint which can easily be chipped, FDS apply several thin coats of paint to increase the durability of the final layer.  Although this point may appear token, the quality of paint and how it’s applied is important, because the radios will be used for many years, and during the course of operation you will be placing pens, clipboards, charts, coffee cups (etc) on the center pedestal and the radios.  Further, as the radio panels are flat, dust will accumulate requiring dusting and cleaning.  Low quality paint will scratch, fade and wear thin within a short period of time.  In my opinion, the quality of workmanship used by FDS, when it comes to painting is second to none.

DZUS Compliant

If you are using OEM parts in the simulator, in particular the center pedestal, then any panel that is DZUS compliant is advantageous, because it enables the panel to be dropped directly onto the DZUS rails to be secured by DZUS fasteners.  The radios can be placed directly onto the rails of an OEM center pedestal and the DZUS fasteners turned to secure the radio to the rail.

FDS IBL Series Distribution Expansion Board.  This board, the size of a credit card, enables 5 Volts to be distributed to several panels.  The coloured wires connect to 5 volts

Integrated Backlighting (IBL) and Power requirements

The radio panels are evenly backlit by FDS’s integrated backlighting (IBL).  IBL has been designed specifically to backlight panels in the identical fashion as is done in the real Boeing aircraft.

Rather than use LEDS for backlighting, FDS use OEM bulbs.  The primary advantage of IBL is the ‘throw of light’ which is greater from a single bulb than a LED (which is pin point).  The only way to achieve a similar light coverage to bulbs with an LED, is to use several LEDS mounted in close proximity to each other.  

Another point for consideration is that bulbs have a different colour temperature to LEDs.  Bulbs are warmer and produce a soft golden glow as opposed to LEDs that generate a harsher cooler light

The backlighting is superb.  The ‘throw of light’ covers all the stencilled letters and there are no dark or bright spots.  The only downside of IBL (if there is one), and this really doesn’t deserve mention, is that bulbs generate quite a bit of heat.  The life of a bulb is also less than a LED, however, FDS claim their bulbs have a life span of ~40,000 hours.

To power the backlighting will require a 5 volt power supply.  Although 5 Volts can be connected directly to the connectors on the rear of the panel, it’s recommended to use a IBL Series Distribution Expansion Board (FDS IBL DIST).

The expansion board will enable 5 volt power to be shared between several panels.  It’s all pretty straightforward and involves connecting some prefabricated wires with clips to the rear of each radio and to the card.  The card is then connected directly to the 5 Volt power supply.  The card I use is secured within the innards of the center pedestal.

To power the M-COMM 12 volts is required, in addition to 5 Volts for backlighting.

fds Ethernet switch and pen for scale

Connection and Set-up

If you are using avionics software other than ProSim737, software will need to be downloaded from the Flight Deck Solutions website (Texworx).

The software is very easy to use and installation self explanatory.  

Configuration of the radios is done via the software and involves indicating which NAV module is operated by which pilot (Captain or first Officer).  The M-COMM module uses the same software (you check the option for this panel during set-up).  The software is not required if using ProSim737.

If using ProSim737 avionic software, the ProSim-AR generic driver will recognise the FDS radios when they are plugged into your computer.  The radios will need to be configured (Captain or First Officer) and this is done in the config/driver section of ProSim737.

The concept of USB doesn’t need discussion, however, the ADF radios are connected via Ethernet. 

While it's possible to connect each radio separately to the main network switch, it’s easier to use a smaller network switch as a hub.  The switch I’ve used is supplied by FDS, is relatively small, can handle 8 Ethernet devices (expandability), and can be mounted into the center pedestal.  A single Ethernet cable then connects the FDS switch (hub) to the main network switch (and then to your computer).

If using Prosim737 avionics software, the radios (USB or Ethernet) can be connected to and run from the client computer.

Rear of ADF radio showing PCB, rear of encoders and push clips

Reliability and Performance

I’ve had the occasional dropout of the navigation and M-COMM radios, however, the ADF radios have worked flawlessly. 

I suspect that the reason for the navigation and M-COMM radios dropping out, is that the USB cables are connected to a powered hub, along with several other items.

I did trial the Tekworx software (using Sim Avionics) and I had several dropouts with the navigation radios that could not be rectified.  These dropouts stopped when I transferred to ProSim737.  

In some radios, there is a time lag when charging the radio frequency.  This time lag may be system dependent and/or a response to the limitations of USB.  This delay is not evident with the FDS radios.

Support

Support from FDS is either directly via e-mail or by a dedicated forum.  The support provided by FDS is outstanding and all e-mails are answered in a timely manner.  

Quick List (pros and cons)

PROS

  • Well designed & constructed (plug and fly).

  • Excellent workmanship.

  • Excellent painting.

  • Realistic Integrated Back-Lighting (IBL) with excellent illumination.

  • Realistic quality machine-injected switches & rotaries.

  • Size ratio is 1:1.

  • Very high attention to detail.

  • OEM DZUS compliant (drop & fly).

  • Easy to use and set-up software (if not using ProSim737).

  • M-COMM radio ideal if space is limited in pedestal.

  • Native support for Sim Avionics and  ProSim737.

CONS

  • Expensive price (subjective).

  • Tekworx software (V 1.8.8. & V 1.9.9) caused disconnection (drop-outs), however, no issues when using ProSim737.

Final Call

The radios are solid, well constructed and the attention to detail is as you would expect from Flight Deck Solutions.  The quality of the radios is very high and suits the high-end enthusiast to professional market.  

My rating for the Tekworx software is 5/10  (V1.8.8. & V 1.9.9)

My rating for the modules is 9/10

Please note that this review is my opinion only and is not endorsed.

  • Updated 13 July 2020.

Populating the B737 Center Pedestal

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oem 7373400 center pedestal (two bay). avionics include cp flight, flight deck solution and oem. this pedestal has since been replaced with a three bay pedestal

The centre pedestal I’m using is a real aviation part procured from a South West 737-300 series aircraft. The pedestal came attached to the throttle quadrant and is the more uncommon two bay style. The Next Generation uses a three bay center pedestal.

I was reluctant to destroy a piece of aviation memorabilia, so rather than cut the pedestal from the throttle and discard it, I decided to keep the two bay pedestal and limit myself only to essential avionic modules.

Apart from the nostalgia of using an OEM pedestal, I really like the DZUS rails that are used in a OEM pedestal, which allow you to drop the various panels into place and secure them with a DZUS fastener.  To read about DZUS fasteners, navigate to my earlier post.

In this post I will discuss populating the center pedestal with panels, and touch on using the panels from a comparative newcomer - SISMO Solicones. I will also discuss some of the problems I had with installing reproduction panels to the OEM center pedestal.

No International Standard  - Variation

There is no international standard established to indicate which model/type avionics are installed in a center pedestal; more often than not, it will come down to the type of aircraft and a particular airline’s requirements.  Early series 737s were fitted with a two bay center pedestal which minimised the number of panels that could be fitted.  Later model 737 aircraft and the Next Generation aircraft series use a three bay center pedestal that enables installation of the latest navigation and communication equipment.  There are benefits to the thinner two bay pedestals, the main positive being more room to climb into the flightdeck.

All 737s will have as a minimum the following avionics installed:  Fire Suppression module, NAV1/2 COMS 1/2, ADF 1/2, audio, rudder trim and transponder.  The important modules will be duplicated for First Officer use and redundancy should a failure occur.  Depending upon the aircraft series, the following may also be installed: thermal printer, HUD set-up, radar, cargo door panel & floodlight switches, alternate communications, etc, etc (the list is almost endless).  Much of what is installed depends on the use of the aircraft, civil regulations in the country of use and the requirement of the particular airlines.

Module Location

As with colour, there is no standardization to the location within the pedestal for any particular panel - perhaps with the exception of the fire suppression panel and NAV 1/2 module which (usually) occupy the forward part of the center pedestal.  Modules are fitted wherever they fit and in line with whatever specification that the airlines requires.  For example, I have observed Audio Control Panels (ACP) mounted toward the rear of the pedestal, which I believe is the favoured position, and also towards to front of the pedestal.

Another interesting aspect to observe is the different knobs on the NAV and ADF radios.  Often simmers became mentally entangled in attempting to standardise everything across their simulator.  This is not necessary; it is realistic if you mix-match panels to a certain degree.

The center pedestal is populated with the following modules:

  • NAV-1 (Flight Deck Solutions)

  • NAV-2 (Flight Deck Solutions)

  • M-COMM (Flight Deck Solutions) new style module that incorporates all radios in one module

  • ADF-1 (CP Flight) - replaced with Flight Deck Solutions.

  • ADF-2 (CP Flight) - replaced with Flight Deck Solutions.

  • Rudder Trim (CP Flight) - replaced with OEM.

  • ATC (transponder) (CP Flight) - replaced with OEM.

  • Fire Suppression Module (OEM 737-400 converted for FS use) - replaced with 737-600 NG.

  • Audio Control Panel (2) (ACP) (OEM 737-400 unit – at the moment, wired only for backlighting)

Avionics Mania

Unless you have an unlimited budget, or have panel sickness, you may want to think about how often you will use a particular panel.  Navigation (NAV 1/2 & ADF 1/2) and communication (COM1/2) modules will be used on every flight; therefore, it’s best to purchase a high-end panel for consistency and reliability. 

The rudder trim module and Audio Control Panel (ACP) are rarely used, with the exception of engine out operations and for turning on/off the audio for the various navigational aids. 

This is a side benefit to using a two bay center pedestal:  there is only so much room available, so you are forced to decide on which panels take precedence over others.

Maintaining Brands – almost impossible

I had wanted to maintain the same brand of modules across the sim to minimise the number of different system cards and interfaces, however, this was difficult to do. 

Flight Deck Solutions, a premium upper shelf supplier of simulation parts to the professional and enthusiast market, do not at the time of writing, manufacture and sell an ADF navigation radio panel.   Further, FDS do not produce the older style ATC (transponder) panel; they only manufacture the newer push button type, and I favoured the older style.

As the MCP I am using is manufactured from CP Flight, and I also have an older style CP Flight transducer, I decided to opt for the CP Flight ADF navigation radios. CP Flight have an easy method to daisy chain panels together. Unfortunately due to supply issues this was not to be the case.

OEM Panels

Nothing beats OEM panels and I am hoping in time to replace many of the reproduction panels with OEM components. In the meantime, I will be using reproduction panels.

SISMO Solicones

A relative newcomer to the scene attracted my attention – a Spanish company called SISMO Solicones.  Their products are reasonable quality for the price paid, are 1:1 ratio to OEM panels, use Ethernet rather than USB, and relatively easy to configure. 

I was very keen to trial Ethernet as a method to connect the modules to the computer. 

SISMO SOLICONES. Note the electronics tab that needs to clear the DZUS rails for installation.  A poor panel design if using an OEM center pedestal

Module Size – Size Matters!

It’s very important to check that the panel will fit correctly to whatever pedestal you are using.  If you are building your own pedestal without rails, then this is not an issue as you can easily fashion a template to drop the panels into.  However, if you are using an OEM panel, you will need to ensure that the panels are built in such a way that they drop into the existing rail system in the pedestal, otherwise you may need to alter your rails.

ADF Navigation Radio Panels – Attaching to the DZUS Rails

The avionics panels made by Flight Deck Solutions are literally drop & forget as all FDS panels are DZUS compliant and fit OEM DZUS rails perfectly.  The ADF radios from SISMO are a different matter.  Each of the panels has a small tab on the electronics board which is too wide to navigate past the DZUS rail in the pedestal.  This is a major issue as the panel cannot be dropped onto the rails.  Why SISMO designed them this way is beyond me, as many serious simmers use OEM center pedestals.

Cutting the Rail – Delicate Operation

Although I was reluctant to cut the DZUS rail, I realized that this was the only method available to correctly fit the SISMO ADF panels.  The rail had to be cut and a portion removed that corresponded to the size of the tab. Removing a portion of the rail would allow the panel to then be dropped into the pedestal. 

OEM 737-300 CENTER PEDESTAL WITH RAIL CUT TO ENABLE REPRODUCTION PANEL TO BE INSTALLED

The DZUS rails are attached at regular intervals to the inner side of the pedestal by several aluminium rivets.  The rivets are not moveable and unfortunately a rivet was located directly where the rail was to be cut. 

After triple checking the measurements, I used a dremel power tool and small metal saw to gently cut into the aluminium rail until flush against the edge of the pedestal.  The cut piece of aluminium rail then was able to be removed; however, the rivet body remained.  I then used a metal file to carefully grind away the end of the rivet head until flush with the pedestal side. 

In addition to this, each of the attachment holes of the panelss needed to be enlarged slightly to accommodate the male end of the OEM DZUS fastener.  This job was relatively easy and I used a quality drill bit to enlarge the hole.  A word of caution here – SISMO do not use metal backing plates, so if you’re over zealous with a drill, you will probably crack the plastic board.

Once the sections of DZUS rails were removed, it was only a matter of dropping the panels into the pedestal and securing them with DZUS fasteners.

SISMO SOLICONES rudder trim and ADF module with power pack.  The rudder trim is A MEDIOCRE reproduction of the real unit. however, it lacks finesse in its final construction. I DO NOT RECOMMEND USING THESE PANELS

System Cards & Wiring – Location, Mounting & Access

I was very surprised at the number of cards required to use SISMO panels.  An Ethernet card is required as is a daughter and servo card.  There are also two power sources: 5 volt powers the small servo moto) that moves the rudder trim gauge and 12 volts powers the module backlighting. 

My main concern was where to mount the cards.  Initially, I was going to mount them under the main simulator platform, but access for maintenance was a problem. I decided to utilise the inside of the pedestal beneath the modules.  This area is rather cavernous and a good place to house the cards and wiring needed for the modules (out of sight and out of mind).

Constructing an Internal Board – to attach cards to

I cut a piece of thin MDF board to roughly the height of the pedestal interior and fitted it in such a way that it created a vertical partition.  To this board, using both sides, I attached the various cards needed.  To ensure that the flat cables had enough room to reach the various cards, I cut a slot in the center section of the board.  I also made sure there was enough room at each end of the board to allow cabling to snake around the partition. The most important point to remember is to ensure that none of the cards touch the metal sides of the pedestal or each other; to do so will cause an earthing problem. 

Wiring wasn’t much of an issue, as SISMO supplies prefabricated flat wiring with plastic clips.  All you need to do to attach the correct clips to correct attachment point on the card – very easy with absolutely no soldering.  As the Ethernet card is mounted within the pedestal, the only wires that need to be threaded through the lower throttle section of the pedestal are the power cable and the Ethernet cable.  The later connects to the Ethernet switch box that is mounted to the shelf of the FDS MIP.

The pedestal innards are now full of intestinal-looking wires attached to an assortment of cards.  It looks messy with all the wiring, but as the wires are flat wires with solid connectors, it is very secure and logically set out.  Access to the wiring and cards is achieved by removing two or three modules. 

Update

on 2012-07-25 05:48 by FLAPS 2 APPROACH

After trialling the panels manufactured by SISMO, I wasn't impressed.  The ADF navigation radio gave spurious results which were intermittent, and the frequency change switch did not provide consistent operation - sometimes it worked and at other times it was sticky and needed to pressed a few times to initiate the frequency change.

The rudder trim module also did not work correctly, even with the correct SC Pascal script. 

The Transponder ATC module looked OK, but never worked as a script was not supplied.  The Audio Control Module looked absolutely awful with poor quality switches and cheap and nasty-looking plastic buttons.

Rather than fight with cards, wires, and a software medium (SC Pascal scripts) which I don't have the knowledge to edit, I decided to box everything and send it back to SISMO for refund.

The SISMO panels have been replaced with panels made by CP Flight and OEM panels.