fail safe

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I have a DX3s with a pico switch running off the Aux port which I activate with the remote start button (or by turning the tx off, going out of range, etc) works great but means that you can not use the 3rd channel for anything else (like a second steering servo)

if you need the third channel for something else then I suggest you just get a killer bee, just make sure you get the right one because the built in failsafe on the spekky Rx over-rides most kill switches, leaving your pride and joy heading out over the hills....
 
The Spektrum has a 'failsafe' built into it - hold the throttle brake where you want it to default if you lose contact - normally about half brake.
The Kill Switch kills the ignition.
V2-S is correct. Mine - SO FAR !!! - is perfect.
Al.
 
You could use the v1 or the v2S Killer Bee with a dx3s radio. With the v1 you can kill it with your 3rd channel button.
 
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