ORIGINAL: DadsToysBG
In answer to your fuel question. During cold weather 15% is easier to start the engine. during the summer time 10% is all you need. the higher nitro may give more power if you need it. Some 4 strokes love hi nitro, but then again it depends on what you want from the plane. Dennis
High nitro does not make an engine easier to start in the winter, however it does make it easier to tune and with lots of cold dense are the engine runs better with the rich mixture nitro requires. To make the engine start easier you add gasoline or naptha to the fuel.