I just bought the .50 size Yak 54 distributed by AK Models and I'm debating as to which engine I should run. I've calculated the expected weight with a 61SF and a 46FX to see what I should use. With the 61, the plane should come in around 6.32 pounds and with the 46 it should weigh 5.75 pounds. The wingspan is 52" and the wing area is 525 sq. inches. I'm getting a wing loading of 26.99 oz/sq.ft with the 61 and 24.55 with the 46. This doesn't seem to be a big difference to me... I'm kind of at a loss as to which engine I should use. I'm not looking to do hardcore 3D with this plane but I'd like enough power to do some extended vertical maneuvers and the occasional hover. I would really appreciate any input.

Shane

You are better off with something like a SA82 if you can if not a simple 52 2C would be good. Keep the weight low and the plane does not have that much wing area. I have flown 40 sized planes with 60 sized 2C engines, there is definately more power but you will feel the weight penalty, I used a 46 2C on both planes at the end. I did it on a WM Rambler and BH SU31, both have much more wing area than your YAK so I think the weight penalty on the YAK will be pretty noticeable.