Harry,
Thanks for the reply, and for explaining that switching cannot be done - obvious now you have explained it.
Perhaps if I tell a bit more you may be able to help.
I have a 4 engined model with all engines operating from the one throttle channel but 4 separate servos plugged into 4 receiver outputs (one for each engine). To counter the inevitable swing at the start of a take off run, which rudder along does not prevent, I want to be able to increase an outer engine on input from the rudder, but then be able to switch off the mixing once rudder authority has been achieved, or once in the air.
Any ideas how this can be achieved, if necessary using both the transmitter and receiver mixing capabilities.
Regards