AV 6 (oz13203)
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AV 6. Free flight glider model. Wingspan 900 mm.
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User commentsSee https://fr.wikipedia.org/wiki/Guy_Borg%C3%A9
Very interesting person. Probably A.V. stand for Aile Volante.
Pit - 30/07/2021
Interesting indeed. I'm puzzled about those "volets de réglage" (trimming spoilers, it seems) on the wingtips. By the way, 10/10 are tenths of 1mm, so 10/10 means 1mm, 20/10 is 2mm, etc. I loved the "Borgé 3" wing section, this must have been plotted following the classic boot outline method - you step on your plywood sheet and follow your boot contour with a pencil, I read this long ago in EAA magazine and it appeared to work!
Miguel - 30/07/2021
What a find! Thank you Outerzone for all these classic old-timers the ooze character.
John Green - 30/07/2021
Hello, the "boot profile" seems to be actually a studied freestanding profile, with double concavity of the midline and constant pitch moment coefficient, widely used in some old flying wings, I think it is worth trying those spoilers !!!
Claudio Acosta - 30/07/2021
Seems to be the same airfoil he later used in the AV-10 (oz 4423). Looks neat, with a very smooth reflex incorporated into it. I wonder if AV's 1 thru 5 and 7 to 9 were ever finalized and published.
RC Yeager - 30/07/2021
I'm not belittling the designer's abilities, the Boot Airfoil Design Method was and is well recognised, think Roncz or Wortmann! The following is Martin Heppele's take on 'flying wings' even if coming much later than this AV 6 plan: http://www.mh-aerotools.de/airfoils/nf_1.htm
Considering all this, looking at the flat extent on the lower surface of his rib shape makes me believe that:
- either M. Borgé´s shoe had a flat side,
- or he made a concession to ease of building,
- or both,
- or none of above :-)
Miguel - 01/08/2021
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