Herbert Graf wrote:
..........
  Aside from this the steering system will default to fully left (or
>right, haven't decided) in case of loss of contact with the transmitter, so
>if everything else goes wrong at least the thing will go in tight circles
>instead of a straight line.
...........

As long as you are going to do this, why put a centrifugal force
detector fail-safe on it which will kill the engine after the thing
spends a couple of seconds in circle joy mode?

From what you are describing, I might consider using a 5 pound
weight on the end of a 6" boom, which is normally hanging straight
down, but which will start hanging out horizontally once you go
into the spin. Have a limit switch mounted near the horizontal
"hang" position. Might use a dashpot too, so normal insane
cornering won't trip the kill switch.

[sometimes I wonder why more piclisters aren't already dead]
;-)

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