I just ordered a Sig Senior ARF and I'm wondering which engine I should use. I have a Super Tigre .51 and an OS .61FX available. I'm looking to make this bird into a candy dropper and camera platform. I'm leaning towards the .61mounted on isolation mounts spinning a 14x6. I've also heard this bird is best converted to a taildragger........any thoughts?
XS

This guy at the field has a O.S .46 AX and it runs great..

Hello; the fellow at our field has an OS 52 surpass in his, flies great. takes off in 25 feet, sounds like a real airplane.

A buddy of mine has an MDS 78 in his. Too much engine, but still needed a lot nose weight to balance. The plane is a real floater, you'll like it.

I would get a 52 four stroke if you have the money. I sold mine to a friend and it was a real sweetie.

You are gong to find that the senior is the easiest trainer there is to learn on bar none. Very gentle flyer.

With the 52 you will be able to have some fun with it once you learn to fly.

If not the 52 I would go with an OS 46AX. My 3rd choice would be an FX. The AX is the best running 40 size engine I have ever had my hands on.

I think you should wait, and in a couple of weeks when the new Saito 2.2 comes out, slap one of those babies in it[X(]. You'll need at least 6 inch tires, though, to handle ground clearance for that 20 inch prop. Should be a fun plane, though, with what I would think would be unlimited verticle

Just kidding, of course. This topic has been beat to death. A lot of people like to overpower these birds. Not a good idea. They are stick built, and too much vibration will tear it apart. Not to mention control surface flutter. Get a 46 class two stroke (the 51 would be ok, with say a 12 X 5 prop), or a 56 class four stroke and have a ball doing what this plane is designed to do--fly around in a scale-like fashion. Great plane!