Check out our unique in-flight starter motor for the MVVS 26cc on a custom built Senior Telemaster.
The system is lightweight and robust. Works from a cold start. Works again and again... it is great for extreme long duration flights and vibration free (i.e., no image blur) video or stills while the engine is off. Also, for all those people struggling with gyro drift, you can get a good gyro fix when the engine is off as well.
Cheers from the MotMen UAV team, Newcastle, Australia.