Hey all, I'm putting together a Cox 40 size Ultimate arf and I want to use a four stroke engine(thats all I have)it calls for a.40-.46 two stroke engine.I've got an OS 48 Surpass and a Saito 56,65 and a 82a.Which would work the best?I dont need to rip the wings off.I want just enough power to keep it interesting.
Any thoughts?

Thanks in advance
Jim
Club Saito Member#509

The .82a would be right to give you good performance.

The OS .48 would be fairly anemic.

A flyer in my club has a Magnum 52 4 stroke on one, and it looks like the perfect combo, flies well and sounds great!

I have a 55AX in mine and it screams. So by using the 150% 2c to 4c rule I'd say that the .82 would be perfect. The plane is a blast to fly, your going to love it. Good luck and let us know what you decide and how she flies w/your engine selection.

Hey all,well I've got the FA82a but on a plane with a 42 inch wing span and 600 sq. inches of wing area and only weighing 5 pounds this little bird would sceam.This engine pulls my big overweight(almost 9 pounds) LT-40 around like it's nothing.I don't want to pull the wings off! Oh well I guess thats what the left stick is for right?

Thanks for your input.
Jim
Club Saito Member#509

No worries, biplanes have a spare wing. I've tried to rip the wings off mine but they seem to want to stay on. Oh well, keep on trying.