RE: Sig 1/6 cou mods
I was also able to test fly the new clipped wing. On the full wing, the wingspan is 71" and the area is 700sq in, the wing loading on mine was 16.4 oz/sqft. I was able to make the clipped wing 6 oz lighter than the full wing, partly due to less wing, but also because of some lighter materials and lighter servos. Sig now offers a 1/6 scale Cwing cub, and lists its wingspan as 54". Mine came out to 52", with around 540 sq in. The wing loading is now 19.2 oz/sqft. It is a little higher, but still ok for a plane this size. With the long wing, it was quite a floater, and would take off in around 10 feet. It would also go SLOW, just about stopping in any breeze. It did have a tendancy to tip stall if you got it too slow and didn't use the rudder properly.
With the clipped wing, I was expecting the takeoff run to be a lot longer and the minimum speed to go up a lot. I also was curious to see its stalling habbits. I am happy to say that the clipped wing is much better behaved than the long wing. The takeoff run is now 15' and it just blasts off. Minimum speed is not appreciably higher than with the long wing, although it likes to be flown a little faster down final. The landing speed is almost identical and it still floats a bit on landing. The aerobatics are much improved, roll rate has of course gone up, but not as much as I would have thought. Knife edge was possible but difficult with the long wing but is now much easier, and is also sustainable. It is an altogether better airplane with the clipped wing. It tracks in a manner that I have not seen in a while and is very stable at high speeds. Of course, it is still a cub, so high speeds are relative! It looks and flies a lot like one of the short wing Monocoups.