Switch help for my 737 simulator

[gkkes]

Hello all

I am considering and searching for a solution to recreating the engine start switches on my Boeing cockpit simulator. As part of the engine start panel in the main overhead there are two 4 position spring return rotary switches (30*). These takes the form of:

11 o'clock - GND - Engine ignition
12 o'clock - OFF
1 o'clock - CONT Continuous ignition (wet & landing)
2 o'clock - FLT - standby position.

Normal startup operation begins by switching from OFF to GND, where it is held on a spring and latch/detent. Once a certain engine fan speed is reached, the hold is released and the rotary springs to the OFF position. CONT and FLT position are normally selectable.

I feel sure that this might be easily achieved with a simple pull or push solenoid pushing the spring latch over its detent. This is easily triggered by my software. Power is available nearby.

I'm hoping someone may be aware of a spring latch assembly, even an alternative method. There are commercially made units around, but these are price restrictive.

Any help warmly appreciated.

 

[(*steve*)]

You might try looking for a 4 position rotary switch with one position momentary.

Whether or not you can get one off the shelf is another thing.

 

[gkkes]

Thanks Steve.
The computer reads the position of the switch and starts the simulation simply by a single closure (ie switch state) and reacts when the switch is operated and moved, as a momentary switch would. I can easily move the switch manually back to OFF at the correct time, but I really want to mimic the real behaviour of the switch.

 

[BobK]

If you can figure out the ratchets and automatic locks, the switch part should be easy using lever switches and a cam.

Bob