ORIGINAL: Tired Old Man
There's a fourth type of kill switch. The one that generates a bucket full of grief in preventing the engine from starting, or generating radio glitches, or the one that has an intermittant component short the kills the engine in flight. A pretty fair number of those of late from what I've been reading.
I have yet to read a post in this thread referring to an engine that failed to shut down that wasn't caused by human error.
Absolutley agreed. This is why I only use one particular brand of kill switch - the one that seems to be the most reliable. It is also the reason I like to see them installed - especially on other peoples planes
They are the easiest way for us to 100% comply with the latest heavy model rules here though - very few 50cc birds are under 7kg (15 lbs) dry weight.