Engine Calculation program
 

I have been flying electric models for a while now and have come to rely on programs like motocalc to tell me what kind of motor/battery/prop combinations work well before I get off the ground. I was wondering if there was a similar program for glow engines? Are you guys relying on experience for your setups or is ther e anice little program that works well for this type of thing?

Engine calc.
 

It's called run whatever engine you like within reason and sometimes unreasonable.

Engine Calculation program
 

In our club, we say go w/ the biggest engine reccomended, 'cause the power will be there if you need it . If you don't need or want it, that's what the carb. is for, you can always throttle back. And a bigger engine can help balance the plane, because you don't want it tail heavy! Prop selection is pretty well known for a certain eng. size (there are charts + tables) or you can ask anyone here, just tell us what plane you've got, and eng. and someone will be glad to help out. Happy Landings...

Engine Calculation program
 

I usually look at the manufacturers recommended range of engines, the weight of the plane, how I intend to fly it and then add a bit more than I think it'll take. My newest plane is a 40 size Ultimate bipe that will be powered by a Saito 72. This engine is just a bit larger than the recommended range.

Seems like I usually end up about 1 engine size bigger than what is suggested.

I would never suggest going smaller than the largest recommended engine though.

Engine Calculation program
 

I usually look at the manufacturers recommended range of engines, the weight of the plane, how I intend to fly it and then add a bit more than I think it'll take. My newest plane is a 40 size Ultimate bipe that will be powered by a Saito 72. This engine is just a bit larger than the recommended range.

Seems like I usually end up about 1 engine size bigger than what is suggested.

I would never suggest going smaller than the largest recommended engine though.