ORIGINAL: Cyberwolf
ORIGINAL: captinjohn
This may be to simple? Mount a servo that is controlled by a extra channel of your choice so that when you flip a toggle switch or flap trim...the servo arm shuts off the power to the ignition. ( A nyrod push rod could be used for ignition seperation.) You know the switch you turn on to power your ignition. Capt,n P.S. is there a problem with that idea?
There is nothing wrong with it, except if you have a radio failure,RFI, or a brown out chances are you won't be able to shut the engine off with the radio, whereas with a opto kill installed the engine will be dead in a heartbeat if such a situation happens.
FYI Alot of the older gas plane's and even some glow used the method you have described, worked good as long as there was not any radio or reciever problems.
So the difference between having aa opto kill switch and not is whether or not the engine is running when it hits the ground? If you have a radio failure, glitch, or brown out the plane generally dies anyway, especially with a 2.4 brown out. Since I don't fly a Spectrum or JR 2.4 I don't experience those issues
The kill switch just makes it a more expensive crash
Sort of like using the most expensive li-polys in a foamie. The cheap ones work just as well but you can proudly say you had so and so super batteries in the thing when it splattered itself all over the driveway.