Pietenpol-List: airfoils
Posted: Thu Jan 15, 2004 8:02 am
Original Posted By: At7000ft(at)aol.com
Weav wrote->Now, don't you think the wing section [23012] would make a good Piet >airfoil?This airfoil has gotten kicked around quite a bit on the KRNet, in discussing it as a possible good one for KRs. The crux of the discussion was that the wing has an abrupt stall characteristic, as seen by the sharp break in the lift coefficient curve. Some of this effect can be moderated by using wing washout so the stall progresses from root to tip rather than having the whole wing stop flying at once, but that complicates the wing rigging and decreases the wing efficiency. The EAA Biplane uses this airfoil, so does the T'Craft, the Beech Bonanza, and a host of others... but there are ones with better stall characteristics.It sure would be interesting to get the Piet airfoil tested in a wind tunnel and get some characteristic curves to study! But until then, there will always be hangar discussions about possible airfoils, won't there?Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.netLearn how to choose, serve, and enjoy wine at Wine @ MSN. http://wine.msn.com/___________________ ... __________
Weav wrote->Now, don't you think the wing section [23012] would make a good Piet >airfoil?This airfoil has gotten kicked around quite a bit on the KRNet, in discussing it as a possible good one for KRs. The crux of the discussion was that the wing has an abrupt stall characteristic, as seen by the sharp break in the lift coefficient curve. Some of this effect can be moderated by using wing washout so the stall progresses from root to tip rather than having the whole wing stop flying at once, but that complicates the wing rigging and decreases the wing efficiency. The EAA Biplane uses this airfoil, so does the T'Craft, the Beech Bonanza, and a host of others... but there are ones with better stall characteristics.It sure would be interesting to get the Piet airfoil tested in a wind tunnel and get some characteristic curves to study! But until then, there will always be hangar discussions about possible airfoils, won't there?Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.netLearn how to choose, serve, and enjoy wine at Wine @ MSN. http://wine.msn.com/___________________ ... __________