ORIGINAL: Optimus110103
and even then you can't hit the switch until the power is on to the transmitter, which you could do from a distance.
RX should never be on when TX is off. Always turn TX on first and off last.
but the throttle hold switch still has power going through thte esc straight to the motor. so it would still be safer thatn throttle hold.
You're just moving the point at which the power is interrupted to a different point in the circuit. You're either stopping power at the ESC by the throttle hold, or before the ESC by another switch. What makes one "safer" than the other? The bottom line is that it's still controlled by the RX which is susceptible to interference and enabled by a switch which can be bumped
As for "wow" factor, you won't even be able to see anything happen, I think my other suggestions have more wow factor than a "remote main power" switch
But what the heck, throttle hold isn't a bad thing to have, and if you don't have it maybe adding this switch isn't such a bad idea. I'm surprised the radio doesn't have it.