RE: 4ch heli radio
.40-60 nitro air plane radios will require a greater range capability than micro electric helis
or park fliers. i wouldn't do it
air plane TX has a click feel on the thorttle. there's a little tab that is removed
from back inside for TX for helis.
the cylic is the same as air planes
heli thorttle mix with collective pitch for higher end helis.
rudder link to gyro for for heading hold capability.