Thanks for responding.
I have already checked the servo with 4 volts from a power sipply I can adjust.
It's working fine.
The wires on the ESC are orange,red and brown.If I reverse the plug on the ESC then the gyro will flash the red light very rapid.
Then it stops and will blink appx 1 blink per second
The ESC is the Century Electron 18/25.
I guess i'll be up all night changing plugs in the RX.
Sooner or later I have to hit the right combination.
Then if that fails I have the reverse switches on the TX.
Thanks very much for responding
Vegas/