I have a Jetcat P70 (Version 5 ECU) that had 3 or 4 successful runs today no problem whatsoever.
On the 4th or 5th flight it started up no problem. I taxied out and took off again, no problems. After climbing to about 50-100 ft there was a puff of white smoke and everything went quiet.
I was able to get the plane down without any damage whatsoever! (Thank goodness for great gliding planes) When I plugged the GSU it was reading something along the lines of 'OverRPM' or 'OVERREV' or something like that.
Ok, everything was checked over and nothing was loose or out of place.
Re-Fuel and take off no problem. After reaching about 100 ft I banked the plane to the right and was on the downwind leg, when there was a horrible noise that could probably be best described as a Bzzzz going from high pitched to silence over the span of about a half second and then silence. It also looked like there was about 4-6 inches of flame out the Turbine exhaust... This time there was no smoke puff (Like there needed to be with that noise)
After making a bee line for the ground and narrowly missing a snow bank and barbed wire fence on top, it ended up upside down in a field with the plane aft of the turbine exhaust smoldering and the inside of both the engine bay and the back half of the electronics compartment covered in Kero.
When it was taken back to the pits area and the wing was taken off (Hi Wing) to reveal the engine bay, it was more or less complete carnage in there. Bits of plastic shattered, the purple cowl to the motor had torn (Yes, the screw holes were converted to slots) and the impeller blades could not be turned by hand. (I'll try to have pictures here later on tonight or tomorrow).

My questions would be... What the heck could have caused the over rev error and could it have subsequently caused the self destruction of the turbine?

The ONLY thing that was different to the previous weekends flying was some new 5% fuel mixed up.

Thanks
George