imac ignition
 

what is the requirement as far as cutoffs for youre planes?can you have the throttle kill the ignition as well as a switch?

RE: imac ignition
 

There has to be a way for the ignition to be killed from the outside of the plane. A standard ignition switch is fine. You just have to have it accessible from the outside (i.e. you can't have it under the hatch). And yes, you want to have the radio set up to somehow kill the engine from the radio as well. Throttle trim or a mix is what most guys usually do.

Hope this helps........Mark

RE: imac ignition
 

I also run a choke servo that can be used as a cut off.

Shawn

RE: imac ignition
 

I'm not sure about a "requirement", but I've seen more than one airplane that could have been saved if the pilot would have had an Ignition Cutoff.

http://www.smart-fly.com/Products/Ignition/ignition.htm

Easy to install, light weight, and your ignition is only armed if your receiver gets the "on" signal. In my opinion, the BEST way to go.

RE: imac ignition
 

I didn't have an optical cut on my 50cc plane, but I put the EDC Optical cutoff on my 40%er


I then have it mixed with the throttle cutoff switch..... so when I flip the switch, the throttle barrel closes completely AND the optical cuts power

RE: imac ignition
 

This year, my club requires our gas planes to stop running when the transmitter is turned off. It's as easy as programming the failsafe on my Ignition Cutoff channel to be "off".

Every gas plane should have an Ignition Cutoff, in my opinion.

RE: imac ignition
 

hadn't thought of that.... the optical is on its own channel so I can just program that one with a fail safe of off....

Great thought

RE: imac ignition
 

There is no requirement within the IMAC rules for any kind of ignition kill device. There also is no AMA rules. IMAA has a rule and many clubs do, but neither IMAC nor the AMA require any kind of ignition kill device.

RE: imac ignition
 

My mistake. Sorry[sm=red_smile.gif]. I thought there was an AMA requirement on a gas engine. Must have been a local club rule as I recall hearing about it long before I got into gas engines.

RE: imac ignition
 

thanks guys

RE: imac ignition
 

But do you actually want your engine to stop if you have a temporary glitch?
I have experienced short time glitches (on smaller models) where I subsequently regained control of the model. If the engine stops, that may cause new problems.
I think I would want the engine to go to idle in fail safe, but not actually stop.

Magne