ORIGINAL: clivemc
this is copied from the 'other ' forum, call it what you like. Sometimes s&*t happens and an opto kill is essential...........
''A run away 50cc just happen yesterday at our field. With no way to kill the engine the owner had to chase the plane around the field trying to catch it. It would have been funny if not for the fact that we all had to hide behind our car incase it came into the pits. Cause of problem: throttle servo linkage came off.''
Seen many a similar situations. Cheap, crappy parts &/or assembly. Often it's fliers preferring cheap over safe.
Some gas engines can run briefly WITH the choke on! Servos fail, as do linkages. Just because it hasn't (yet)
happened to you, be patient.
Myself, I prefer safety over being cheap, so I always use a remote ignition kill system on all my gassers. Adds
another layer of protection should it be needed. First I use the throttle kill, then the ign kill, then there's also
the tx OFF, as ign kill is linked to rcv power. Multi layers of safety.
Last resort is my baseball bat. Actually used it once, and saved another fliers ankles from getting mauled!
Safety first, then you can fly with confidence and have fun.