Hmmm, Why do we need it....?<div>
</div><div>Because when a 50cc PilotYak 54 comes screaming out of the air  at wide open throttle and the pilot has no radio link to the plane even if the battery failed and fail safe could not work the Opto kill would have prevented it crashing into the pit area with the prop still spinning. It would simply have floated out of the sky. Instead its paper mache.</div><div>
</div><div>I simply demand a kill system on my planes that is independent of the Radio system. If an opto kill sees the voltage drop to low on the Rx it kills the engine. Its the last thing it does before being destroyed with the rest of the plane. Opto is my friend.</div><div>Now if only my club buddy had one installed.</div><div>Instead he had a single Rx battery and ran the Ign off an IBEC.</div><div>He lost the radio link but the IGN was still seeing power so it remained at the last setting, WOT.</div><div>
</div><div>Clearly there were other safety mechanisms not armed. But an Opto Kill is so easy so if the other more creative mechanisms are not in ones head space then an Opto Kill is nearly fool proof</div><div>
</div><div>Yeah maybe I'm paranoid but I'd rather have a means to shut down the engien that have to fork out millions in personal liability and cosmetic surgery for the victims of an accident</div>