Why the larger engine?
Whim?

Well actually I was looking for something in the 75 to 80 inch range that I could hopefully keep ataround 9lbs or so to put a larger four-stroke on.I wanted something similar to J-3 Cub performance. Mild acro and slow flighting in the traffic pattern. Just a plane to play with. Also, the forward fuse needed to allow the fuel tank to be placed below the thrust line by about 2 1/2 inches. One of the guys in my club was flying his Kadet Senior ARF today. The Kadet Senior was one plane I had viewed with some interest while on the SIG site. Over the years I have seen several Seniors bashed into fairly interesting and fun planes. Take out most of the dihedral, add ailerons, make the wing mount more modern, perhaps lift struts,etc. During today's conversation with the Seniorflyer, he mentioned he hada kit, NIB that he'dsell for $60. Sonow youknow how all this got started.

Being a kit, IWill be able to more easily move equip, batt, and such so as to keep the CG right without adding weight. I can strengthen the forward fuse and use thicker firewall plywood to accommodate the larger engine. Anyway, that is the present plan.

dick Hanson, I checked the plans and the flat wing bottom and stab are at 0 degrees incidence to the fuse datum line. The chord line of the wing is probably pretty close to 5 or 6 degrees up. So I guess that is why the motor is 6 degrees down. What would happen if the wing incidence and motor thrust angle were both at or near zero? Since this is going to be a taildragger, negative lift at takeoff would not be an issue.