Adrian-Thanks for the report. If somebody knows, are the GTB thermal shutdowns because of motor overheating or speed control overheating. Those that have unplugged the tiny blue wire previously mentioned on this thread would know.
Here is a link to a well vented aircraft motor. I don't know why we don't have vents.
http://www2.towerhobbies.com/cgi-bin...?&I=LXLWW1&P=7
Here is a link to a photo of a vented aircraft motor that also probably has an internal fan.
http://www2.towerhobbies.com/cgi-bin...?&I=LXHEW2&P=7
There is a better picture of a fan cooled motor in the most recent tower hobbies sales catalog for aircraft.