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ding(at)tbscc.com
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 Posted: Sat Nov 22, 2008 11:51 am Post subject: Wing fitting / W.W. Corvair |
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Wade,
Based on my experience, do NOT cut all the way back to the co-ordinates shown in the plans. I would recommend leaving a minimum of 1/2 inch extra, probably more, on your initial cut. Support your wing in some fashion, and gradually mark and trim as you approach spar bolt alignment. Use the fuselage side as a marker guide, mark, slide the wing out, trim and do it again as you sneak up on the final position. If I recall correctly, the final gap needs to be about 4mm for the rubber root moulding to fit well. Taper ground 5/16" pins or hardware grade bolt shanks are ideal to help align the spar bolt holes as you get close. It took me about three or four hours to trim each wing skin. Also, as part of this process, you need to establish the rear spar final position vertically and laterally. Zenith wants a minimum of 12mm edge distance (preferrably more) on the rear spar bolt. Use a smaller bolt when drilling the first hole, so you still have room to tweak it. Ideally, the centerline of the flap hinge pin will align with the center of the flap actuator shaft, though "close" is OK, as long as both sides are identically positioned relative to the fuselage.
On a separate note, I couldn't be more satisfied with my W.W. Corvair. The components that William produces are first class in both design and manufacture, and will allow you to produce a quality powerplant that performs exceptionally in the 601 / XL. I'm still in early Phase one testing, and have no hard performance numbers yet, but this plane is all I hoped for, and more.
Lynn Dingfelder
601 / XL W.W. Corvair Power
[quote][b]
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zenithlist(at)yahoo.com
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| Posted: Sun Nov 23, 2008 5:49 pm Post subject: Wing fitting / W.W. Corvair |
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Do you remember how much vertical movement the rear spar can move relative the rear spar attach plate? My completed wings seem to be quite rigid at the spars and I wonder if I can still adjust the wing pitch by moving rear spar vertically when I bolt the wings. Also, how do you measure the wing pitch angle and at what location?
From: dingfelder <ding(at)tbscc.com>
To: zenith-list(at)matronics.com
Sent: Saturday, November 22, 2008 1:50:05 PM
Subject: Re: Wing fitting / W.W. Corvair
Wade,
Based on my experience, do NOT cut all the way back to the co-ordinates shown in the plans. I would recommend leaving a minimum of 1/2 inch extra, probably more, on your initial cut. Support your wing in some fashion, and gradually mark and trim as you approach spar bolt alignment. Use the fuselage side as a marker guide, mark, slide the wing out, trim and do it again as you sneak up on the final position. If I recall correctly, the final gap needs to be about 4mm for the rubber root moulding to fit well. Taper ground 5/16" pins or hardware grade bolt shanks are ideal to help align the spar bolt holes as you get close. It took me about three or four hours to trim each wing skin. Also, as part of this process, you need to establish the rear spar final position vertically and laterally. Zenith wants a minimum of 12mm edge distance (preferrably more) on the rear spar bolt. Use a smaller bolt when drilling the first hole, so you still have room to tweak it. Ideally, the centerline of the flap hinge pin will align with the center of the flap actuator shaft, though "close" is OK, as long as both sides are identically positioned relative to the fuselage.
On a separate note, I couldn't be more satisfied with my W.W. Corvair. The components that William produces are first class in both design and manufacture, and will allow you to produce a quality powerplant that performs exceptionally in the 601 / XL. I'm still in early Phase one testing, and have no hard performance numbers yet, but this plane is all I hoped for, and more.
Lynn Dingfelder
601 / XL W.W. Corvair Power
[quote]
[b]
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jaybannist(at)cs.com
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| Posted: Sun Nov 23, 2008 6:13 pm Post subject: Wing fitting / W.W. Corvair |
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John,
As I recall, my wings were fairly rigid in the wing pitch direction. As it turned out, that didn't make any difference, because they already conformed to the pitch angle dimensions given on page 6-S-3 of the drawings, without any adjustment. I suppose you could move the rear spar up or down 1/4" or so, but not much more than that. If you have crossed your Ts and dotted your Is during construction, I don't think you will have any problem.
Jay in Dallas
Do not archive
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ding(at)tbscc.com
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| Posted: Sun Nov 23, 2008 7:10 pm Post subject: Wing fitting / W.W. Corvair |
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John,
I concur with what Jay said. This was basically adjusted when you used the "fixture" to set the relative spar locations.
Lynn Corry, PA 601 XL / Corvair
[quote][b]
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DaveG601XL
Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh
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| Posted: Mon Nov 24, 2008 3:49 am Post subject: Re: Wing fitting / W.W. Corvair |
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Me too. My rear channel was very close to the 6-S-3 drop dimension from the longeron. If you needed to move it a bit, there was some movement, but it was not a lot.
Good luck,
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David Gallagher
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