RE: 1/3 Scale 1913 Eastbourne Monoplane
To arm giant scale planes safely, I have used battery cut-off switches on previous projects like this one from Flaming River Industries called, "The Switch". Although this version is more expensive than the ones from Harbor Freight, it does have a nice mounting plate that allowed me to easily adapt it (with a hammer) for the correct angle to be a steering wheel base.
I then modified the red arming key, using various items like a 3" key ring, servo arm, fuel and brass tubing, to become the steering wheel and column. The steering wheel was then spray painted and wrapped in a black leather strip from Michaels. In this manner, the Eastbourne can be safely and easily armed for flight while retaining a scale look in the cockpit.