Originally posted by mgmoore7
I agree with MikeL. You need to get plans for a .40 - .46 plan if you are going to buy that size engine. Otherwise, a .25 - 30 will be about right for your wingspan. A .40 or .46 will be too much weight and too much power for that size plane.
Actually it depends on the wing chord. My Uproar only has a wing that's only 2" bigger, but due to the fact that it's got large chord, it's got more than enough area to provide adequate lift for a 46 engine and 5 standard servos. In fact with a 46 on it, I can still fly it slower than the vast majority of trainers. But I'm a
light is right kinda guy and now a TT Pro-36 powers this fun-fly. It's 4-6 oz lighter than most 46 and about as powerful as a good BB 40. My favorite engine.