lr27
Well-Known Member
I don't know whether this belongs here or in the ultralight area, but it does involve design. Have been thinking about a part 103 ultralight that might put some structure between pilot and whatever he's crashing into. Also, something with relatively benign stall. And something to make fun of the part 103 rules with. So this one's VERY rectangular. As of now, it's just hoked up very crudely in X-plane, which I just got running yesterday. Intended to run a Briggs, maybe even direct drive, though in the latter case it probably needs to be a v-twin. X-plane seems to think that this one meets the top speed and the stall requirements. It also seems very easy to fly in X-plane, though after doing low level aerobatics with someone's Pietenpol model I'm a bit skeptical. The rectangular shape is supposed to meet the Appendix two formula to avoid testing. Not sure there's a way to avoid testing on the speed part, though I'm thinking about it.
I've attached a picture. The X-Plane model is too big, and still very crude. However, I guess I could send it to someone if the email goes ok. About 2mb, I think.
Span 19 feet, chord 12 feet. AR about 1.6. 25hp (as I recall) direct drive, was hoping for less. Full flying elevons or whatever you call them, perhaps build like vertical stab on Volksplane. Two fins and rudders, differential throws. Probably there are further refinements that could be used to cut the induced drag a bit.
I've attached a picture. The X-Plane model is too big, and still very crude. However, I guess I could send it to someone if the email goes ok. About 2mb, I think.
Span 19 feet, chord 12 feet. AR about 1.6. 25hp (as I recall) direct drive, was hoping for less. Full flying elevons or whatever you call them, perhaps build like vertical stab on Volksplane. Two fins and rudders, differential throws. Probably there are further refinements that could be used to cut the induced drag a bit.
