ORIGINAL: Rafael23cc
ORIGINAL: BarracudaHockey
If the switch looses signal completely it defaults to kill engine.
I understand how they work, and I am thinking of using one on my big planes. It would be a secondary way of killing an engine other than a throttle servo.
But how does the switch sense a loss of signal when there is a failsafe pre-programmed at the receiver end? I mean, If the receiver goes to low throttle during a failsafe event, how does the switch know that the receiver went to low throttle because of a loss of signal? That is the part I do not understand; the automatic part. I would definitely program the failsafe at the receiver to activate the channel to kill the engine via the opto-switch, but raptureboy said that the switch reacts to singal loss as a feature of the switch not a feature of pre-programmed failsafe. Am I totally off base here?
Rafael
The switch doesn't know there's a loss of signal. The reciever knows there was a loss of signal and applies fail safe position to the servos (well the channel outputs in any case). The kill switch is connected to an aux channel on the reciever, that channels fail safe position is sent to the opto kill in a loss of signal event, which if you programmed it correctly, is engine OFF.