Original Posted By: Isablcorky(at)aol.com
Had a pretty nice Christmas day, assembling wings back onto the fuselage of 41CC. Dusted off all the parts and pieces and it went together fairly smoothly. Struts and brace cables, wing gap covers, nuts and bolts, everything but inspection covers (waiting for A&P to do the annual).Interesting to see how it rigged out without adjusting anything or moving anything. The wing has about 3" of dihedral and about 2 degrees of washout. I believe that the dihedral is exactly per Corky's original rigging, but not sure about the washout. I'll keep it as-is for test flights and see how it flies.We checked dihedral by stretching a cord from wingtip to wingtip right at the front spar, then measuring the dihedral at the wing center section. We checked washout using a 3/4" plywood template that I cut out, leaving the top edge square and the bottom following the curve of the wing top surface from nose (leading edge) to about the aft spar station. We put this template on top of the ribs at root and out near the tip, with a digital level on top of the template, to determine angles at root and tip, obtaining washout by difference. Pretty accurate.With the stick centered, the ailerons (piano hinged) rig out with their trailing edges just a tad below the TE of the wing on both sides. My test pilot Charlie says he remembers it flying this way originally; I'll have to look through the in-flight photos to see if that's so. I can take out the droop and bring the TEs of the ailerons into perfect trail with the wing TE if need be, but I wanted to put it all back together the way it originally was before tweaking anything. Wing gap covers went back on with all holes lining up perfectly, so that's a good sign.Winds were gusting over 35 kts at Zapata County Airport yesterday as a strong cold front blew through, so no taxi testing yet! Sure was good to see the airplane looking like an airplane again.Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net_________________________________________________________________Your Hotmail address already works to sign into Windows Live Messenger! Get it now ________________________________________________________________________________
Pietenpol-List: together again
Re: Pietenpol-List: together again
Original Posted By: "Steve Singleton"
Subject: Re: Pietenpol-List: together againOscar,41CC got a great Christmas present when you got all her parts back on !!I keep my ailerons rigged even with the trailing edge, and there is no difference in flight. Washout is not really necessary in a Hershey Bar Wing,because this planform inherently begins to stall inboard, and progresses to theoutboard. However, it would be best to err toward washout. On a perfectly straight wing, rigging the trailing edge of the ailerons UP will (by reducingthe angle of attack) cause washout. The drooped trailing edge of the flippers seems to be a Pietenpol characteristic.Chuck G.________________________________________________________________________________
Subject: Re: Pietenpol-List: together againOscar,41CC got a great Christmas present when you got all her parts back on !!I keep my ailerons rigged even with the trailing edge, and there is no difference in flight. Washout is not really necessary in a Hershey Bar Wing,because this planform inherently begins to stall inboard, and progresses to theoutboard. However, it would be best to err toward washout. On a perfectly straight wing, rigging the trailing edge of the ailerons UP will (by reducingthe angle of attack) cause washout. The drooped trailing edge of the flippers seems to be a Pietenpol characteristic.Chuck G.________________________________________________________________________________