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The purpose of FLAPS-2-APPROACH is two-fold:  To document the construction of a Boeing 737 flight simulator, and to act as a platform to share aviation-related articles pertaining to the Boeing 737; thereby, providing a source of inspiration and reference to like-minded individuals.

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Journal Archive (Newest First)
« Changing Pilot Automation Dependency | Main | RMI Switch Assembly (ADF/VOR) Installed to Center Pedestal - Flying by VOR & NDB Made Easier »
Wednesday
Jan292014

RMI Knobs Installed to Main Instrument Panel (MIP)

Following on with the theme from my last post, I have replaced the two tear-drop style RMI knobs supplied by Flight Deck Solutions on their Main Instrument Panel with two replacement knobs.

LEFT:  RMI knobs fitted to the RMI frame of the MIP.  ProSim737 allows for a number of differing style RMI gauges to be displayed - framed and frameless (click to enlarge).

The replacement knobs are highly detailed reproductions of the original B737-800 RMI knobs.  I would like to have used genuine knobs; however, as they are usually attached to an RMI gauge, finding the knobs alone at a reasonable price would be a difficult if not an impossible task.

The knobs have been individually sculptured using clear ABS plastic while the front plate is made from clear acrylic.  The knobs are then painted in the correct Boeing grey colour and the black and white stenciling applied directly to the front of the knob.  The knobs can be easily backlit using an LED, although I have yet to do this.  The sizing of the knobs can be determined from information supplied by EHC Knobs located in Farmingdale, New York.

Stand-by Instruments - RMI Gauge

There is no "stock standard" concerning how the stand-by instruments are displayed with a reproduction MIP.   You may have the capacity to include real stand-by gauges (lucky you…) or reproduction solid state gauges manufactured by Flight Illusion, Sim Kits or similar. 

Flight Deck Solutions (FDS) have choosen to use a single LCD monitor to cover the EICAS and stand-by gauges.  Fly Engravity use solid state Flight Illusion gauges. 

Looking Pretty.....

At the moment the knobs have not been interfaced and just sit there “looking pretty”

In the future, I may interface the knobs by installing micro-buttons and/or a micro- rotary behind each knob.  The knobs will then be connected to an interface card.  However, at the minimum this requires cutting the MIP to create additional space for the location of the micro-switches – something I do not want to contemplate at the moment.  If given a choice, procuring a genuine OEM RMI gauge would be my preferred option.

In the interim, the RMI Switch Assembly panel discussed in my earlier post will suffice.

The RMI knobs are now replaced with OEM knobs from a B737-800 that are fully functional.

Acronyms

MIP – Main Instrument Panel
RMIRadio Magnetic Indicator.  The gauge that displays VOR and ADF mode.  Part of B737 NG stand-by instrument cluster

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