How about a UL Buhl Pup replica?

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Tiger Tim

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I seem to have forgotten to throw any textbooks in my bag, does anyone have a method of calculating stall speed of a rectangular wing for dummies?
 

cluttonfred

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Calling @cluttonfred do you still have the information on hand for a little cable-braced French(?) monoplane you posted elsewhere a few months back?

It goes back more than a decade, not a few months, but is this what you meant?

 

Tiger Tim

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Maybe someone else posted but I thought there was something a little newer, maybe made sometime between the 70s and now. I think it was posted within the last six months but the way the last two years have gone, who knows?
 

Tiger Tim

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Found it! It was the Starck A.S. 90 “New Look” I was thinking of.
Here’s a quick copy of the Starck’s specs:
4D31B18E-EE12-4F38-913C-05B7A8EEF945.jpeg
If my high school French holds, it tells us it has 18hp (unless France used a different power standard?). I think it also has a span of 7.4m (24-ish feet), length 5.35m (17.5 feet), 9.4m^2 wing area (101 square feet), empty weight 120kg (264lb), and a max gross weight of 210kg (463lb). The useful load kind of sucks but such is life.

Performance appears to be max speed(?) 90km/h (56mph), cruise speed 80km/h (50mph), I assume the next one is stall at 35km/h (22mph!), and possibly ceiling and range respectively at 3000m (10,000 feet, give or take) and 200km (125 statute miles).

All up, those are very 103-ish specs in an airplane designed on another continent a decade or more before the FAA put pen to paper on their own rules.
 

cluttonfred

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It’s a neat design. In other drawings I have seen the ailerons appeared to be offset below the trailing edge for a slotted effect but I don’t think I have ever seen a good photo to confirm that. The Aubier & Dunne engine was used in another early famous French ultralight…the original Mignet HM.14 Pou-du-Ciel or Flying Flea.
 
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