ORIGINAL: SKYHI1
I appreciate the advice, I have thought about the problem with prop clearance. Do you think adding height to the main gear will effect the planes overall performance in any way? Or is it just going to be more drag? I have thought about putting a 2 stroke .61 on it instead. What do you think?
Tks
Frank
Frank,
The four stroke will work great on the model. You probably only need about 1" additional length on the gear. The 90 4 stroke is geared down as randy109 mentioned, so the engine will turn around 16x6-8 or so. We no longer use 1/4" aircraft ply on anything up to 2 meter size. 1/8" aircraft is all that's needed. Any doublers you might use, could be 1/64" ply or 1/32" with large cutouts. We generally use 1/8 balsa medium grade for fuse sides and 1/16"-3/32" top and bottom
The 61 will produce a significantly lighter model though...... and you would need to build the tail according to the powerplant you intend to use, to avoid unnecessary weight addition later. The 61 will use less fuel but that's a minor concern. Either engine will have adequate power for this size model, especially for the Sportsman schedule.
Good luck with your project. I love hearing fellas stiil building their models. You can get very creative on the building board especially with existing designs... opportunities that ARFs do not give you
MattK