How about this: A throttle servo that would have it's own internal power supply, (battery) that would be either pull the throttle to idle, or completely closed in the event that it didn't see power signal from the receiver. Lose a battery pack in flight, or have it come unplugged and at least the throttle would kill the engine. You would still lose the plane, but at least the prop would not be spinning when it hit the ground. Just an idea. Bill
Its essay enough. Just make up a cable and give the throttle servo and a failsafe unit its own battery.
And if you can't secure the main battery good enough to where you are planning on it needing a backup in the form of a separate battery for the throttle servo, what makes you think that you are any more capable of securing the throttle servo do IT doesn't become unplugged?
MJC
There is an easier solution. Using an easy to turn servo (such as a coreless), use a spring to close the throttle when the servo loses signal or power. It will consume more power in normal operation because it will have to hold the throttle open against the spring.
Of course, an interfering signal can still make it go ape.
-- Mike Norton
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