The new Rossi's are very fine engines, but they do like to rev... They're not racing engines, but the .45 will perform excellent on a good pipe at 16-17K rpm.

Without a pipe, still a good engine, but that's not really what they're made for... a friend of mine has got one on a Midwest SuperHots, but then scaled down to .40 size from my plans... It hauls *$$ This guy learned to fly on this thing (he put it in a bush the first time he flew it, after I had taken off the plane...I did'nt have the chance (time) to take over... I did the maiden for him. My Super Hots had a ST .90 on it with a 15-6 prop and was a prop hanger... but his was a speed plane: I was impressed with the speed that plane developped with that engine... The Super hots has a really thick wing...

To keep the story short: if you get yourself a good (full) pipe on that Rossi it will be a fine engine... throttles very good... response to the power stick is excellent... whip crack acceleration. You will enjoy it... and remember it does not need (or even like) high nitro fuel...

Also, most european "hot engines" have high compression to perform well on low nitro fuel: because that stuff costs a bundle here. I just ordered from a cheap supplier and the stuff cost me about 20$ per kg... put a Rossi #5 plug (cold one) in the engine and add 5% nitro to improve idle with the cold plug... maybe a Rossi #4 if the weather is really cold (but then it has to be freezing really hard)..