Parachute release

["Smith, Simon-Pierre" <Simon-Pierre.Smith@PSS.Boeing.com>]

Here's a question...

How is the automatic parachute release for tipover of a streamline motorcycle 
set up?

I can imagine a mercury switch with a solenoid, or a mercury switch to a 
solenoid controlled air valve and a pneumatic piston to pull the cable.  I can 
even imagine a mechanical setup.

Is there much incidence of these accidentally deploying?

Being a safety device I'd like it to be a simple system and so far none of the 
soutions I've visualized were very simple.

Thanks,
Simon Smith