69
« on: October 05, 2010, 09:45:38 PM »
I'll give you my two cents worth. . . .cause that's probably all it's worth.
The trailing edge fences are more important on a Varieze because of the back swept wing. More so than on the Longez. The fences help keep the air flowing towards the rear of the wing instead of washing outward towards the wiglet. This helps with slower approach speeds by maintaining aileron control down to slower speeds on approach and shortens the landing roll. On the top end, it offers no speed improvement, .in fact if anything, . .adds a little drag. (quite little though). At cruise speed I don't think they have any effect except like I said a little drag. They are quite simple and easy to make. I made mine on the kitchen counter. Took four layers of bid and made a big flat square from which I cut two each fences. I made mine (long-ez) about four inches tall and about a foot long. For Vari-eze they could be a little smaller. I put mine on each end of my aileron. On the Varieze, I think you can put one on the inboard side of the aileron, and then I think I've seen two or three on the outboard side of the aileron. Evenly spaced. I floxed mine directly to the wing and radiused them in all perty . .but it was a lot of work and screwin' around. Much easier to use RTV (room temp vulcanize (or silicone in laymans terms)). Very important to get them mounted at the right angle. Kind of complicated, but I dropped a plum line to the floor from my spinner center and from my pitot tube in the nose and made marks on the floor. Then I measured over to where I thought they should go and set up a ladder above the mark on the floor. Then I dropped a plum line . . . . ( more on next post ) . . . . . .