Hi Robert,
Do you know what the battery voltage was immediately after the flight?
Was the battery too hot to hold?
How much capacity did you put back in, compared to the capacity?
How is the low voltage cutoff in your ESC set?

we need more input,
Dean P.

Robert,

Check your motor wires and connectors (if you use them). Make sure that the motor windings and connecting wires are intact. If you have tried a new ESC and had the same results it points to the motor or possibly the timer. But you say that you have tried different motors, ESCs and timers!! I'd be about ready to give up!

You do not say what ESC settings you are using. If you are not already using "Control line mode governor set RPM," try that setup. Be sure you have the correct motor and battery settings in the ESC.

Also Castle Creations may have a trouble shooting FAQ on their WEB site and I have heard that their personnel are also helpful. Give them a call.

Good luck.

Hi again Robert,
Like John said ... let me add one thing, though.
Try re-arranging the wiring, especially in getting the control cable as far from the high-current motor wires as possible. Even if you have to do something that looks ugly, in order to get the timer and control wire away from the high-current path, it is worthwhile for the experiment. The motor drive wires can induce noise into the ESC control signal which the ESC will correctly interpret as being illegal (not a nice clean 1 ~ 2 millisecond long pulse 20 times a second) and shut down the motor for safety reasons. The control cable should be dressed to leave the ESC at right angles to the battery input wires. Shame they have exit right next door to them!

let us know how it goes,
Dean