I just wanna gripe about my evolution .61 I have,and likely the last evo I'll own. This thing has 2 BAD problems that even the best r/c guy at my field cant figure out.

1: During long inverted climbs it dies every time......It seems to lean itself out and quit during this maneuver. It helps to richen the motor a tad too much,but it really takes away from the overall power,plus it still dies....just takes longer. We've tried about everything including putting fuel line piece around the needle valve to seal it up from any air leaks. I just sure seems to lean itself out because it gets alot worse as the tank gets lower and lower. It runs fine everywhere else,just hates long inverted climbs.

2: The transition from idle to full throttle is HORRIBLE......It either dies from being too lean on the low end or spits and sputters like crap until the high speed needle takes over. No in between. This makes taking off more difficult as you throttle up. And you better not botch your landing and have to "punch" it.

On a side note....this engine above all my others is WAY more affected by heat and humidity.


I've been flying this engine in my sukhoi for awhile now and it bugs the crap out of me every time. It runs.......just not real well. It a very UNpredictable tune. I've grown used to it,but will never like it.

The only thing good I can say about it is that its the coolest LOOKING engine I own,lol.