Originally Posted by
1QwkSport2.5r
Note the OPs location. Indonesia may have different rules as far as what engines are allowed.
You are correct, in competition only 4 engines are allowed, asp, supertigre, os and I dont remember the last one.
I have used ASP before however, OS turns 500 more RPM.
However, everyone uses OS .46 and some only use it for a few races before changing the piston and liner,
the only fuel allowed is coolpower 15%.
I guess running the engine screaming at 16, 17k shorten it lifespan by huge factor.
That is why I am searching a better way to power the plane for practice routine,
The need to practice with similar speed is important to get good feeling,
Alternatively, I can build a plane with may be less drag to achieve similar result, however, right now I opt for engine change.