Yes kind of Cheap (aka Chineese >
) 'Fuel Cell' which can run on many kind of fuel (LPG/CNG/Gasoline)....
So what is the recipe of future R/C planes :
1. BIG Brushless Outrunner
2. Huge ESC
3. bloomBox mIni
4. Methanol !!
Thats like marriage of EP and Nitro !!