rpm
11-24-2008, 07:50 AM
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RE: rpm
QJ2 Q-500 engine you want to see at least 19,500 ground peak rpm. Launch it above 18,800 rpm. Prop 8.8x8.75 seems to work very well.
QM2 Q40 engine - I look for a ground peak around 23,000 rpm combined with an easy to set needle. Back down to 22,500 for launch.
The Jett engines use less prop than the Nelson, but they will turn higher rpm.
Always start on the rich side, then sneak up on it each flight.
