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TCTom
USA
274 Posts |
 Posted - 09/04/2022 : 16:11:41
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I've had some original P type front and rear wings 3D scanned and am making forming bucks for repair and remake. Working with my files in the software, I see a couple interesting things:
The cross section profile of the wing curvature is virtually the same from front bottom to where the rear tip shape starts. This shape is an ellipse with diameters of 5.25 x 6.875".
The side profile cross section (rounded shape of the wing) is really close to a circle with a 36" diameter.
Hopefully I will get the forming buck made this weekend. Here are photos of when we were scanning, and the side profile shape from the 3D file.
If I have any of this incorrect, please let me know!
Tom Wilson
Zionsville, IN USA |
Edited by - TCTom on 09/04/2022 16:12:28 |
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Bruce Sutherland
United Kingdom
1551 Posts |
Posted - 09/04/2022 : 22:33:38
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Tom,
I wish you luck in getting a cogent answer to your query, but good luck for trying.
After making an accurate 3D model for each wing ('fender' - for ex-colonials) and corresponding formers for each, my wish would be to follow a former colleague's process of making a multi-layered carbon fibre composite lay-up off each former, which was then coated with a thinly sprayed application of metal/steel/stainless steel - light weight and far stronger and impact-resistant than anything original (mild steel) - would be un-detectable to the OP...!! 
This process was used/demonstrated to make a rear bumper moulding for a Bugatti Veyron with a polished stainless steel finish.....
Bruce. (PB0564) |
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Oz34
United Kingdom
2501 Posts |
Posted - 10/04/2022 : 10:25:14
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I'm game for that Bruce......as long as you pay for it. 
Dave |
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DickMorbey
United Kingdom
3672 Posts |
Posted - 10/04/2022 : 11:33:40
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Hello Tom,
I can't comment on the technical or dimensional aspects, other than to commend you for using modern technology to add to existing understandings about how the wings were fabricated. Puts me in awe of the skills of those who went before us!
Dick Morbey, Register Secretary
PA-PB 0743
Frieth, Oxon, UK
secretary@triple-mregister.org |
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Ian Bowers
United Kingdom
937 Posts |
Posted - 10/04/2022 : 11:46:02
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I am sure that would have been a pressing and not hand built.
From the story of Pressed Steel, suppliers to car builders. No mention of wing construction:
"In the coachwork exhibition at the 1931 Olympia Motor Show alongside the products of Salmons, Thrupp and Maberly, Windovers etc. Pressed Steel Company displayed bodies of a Twelve-six Harley de luxe Austin saloon, a Hillman Wizard 75 de luxe saloon and a 12-horsepower six-cylinder Rover Pilot. Readers of The Times were told the bodies were made in four pieces, the back, two sides and the front. The doors were also stamped in one. These all-steel bodies were said to give the cars lightness with great strength, more room inside and better visibility.
Ian Bowers
OD 6791
J3 3772 |
Edited by - Ian Bowers on 10/04/2022 11:49:31 |
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TCTom
USA
274 Posts |
Posted - 10/04/2022 : 15:44:17
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It appears the wings were pressed as one piece, and then the inner rear side panel was welded into place. Next step would've been final finishing of the rear tip, then wire edge installed.
Once I know everything is right I can put together a document along with my drawings for posting to the documents section of our site.
Tom Wilson
Zionsville, IN USA |
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TCTom
USA
274 Posts |
Posted - 11/04/2022 : 21:28:36
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Here is the forming buck I made from this work. Tuesday I meet with the metalworking shop - hope they like it!
Still have some detail work to do on the form; we'll do that together.
Tom Wilson
Zionsville, IN USA |
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Simon Johnston
United Kingdom
6015 Posts |
Posted - 11/04/2022 : 21:51:48
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Quite astonishing work, Tom. It’s maybe just the angle of view of your buck but does it reflect the way the lower front of the wing seems to be tangential to the base circle over the last couple of inches?
Simon J
J3437 |
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TCTom
USA
274 Posts |
Posted - 11/04/2022 : 22:56:07
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Yes it does, Simon
Tom Wilson
Zionsville, IN USA |
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Simon Johnston
United Kingdom
6015 Posts |
Posted - 11/04/2022 : 23:15:37
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Thanks, Tom. An amazing project. I don’t think they’d anything quite like this at Abingdon, did they? 
Simon J
J3437 |
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TCTom
USA
274 Posts |
Posted - 11/04/2022 : 23:25:43
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Actually Simon, my understanding is it's a pretty coomon type of forming buck. Some have more ribs and are stronger for long term use and hammering. This one will be used as a pattern for repairing wings and making new ones. Work the metal, test fit on the form, repeat until satisfied.
Tom Wilson
Zionsville, IN USA |
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Simon Johnston
United Kingdom
6015 Posts |
Posted - 12/04/2022 : 07:47:26
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I meant they probably didn’t have 3D scanning at Abingdon, Tom . Bucks like this would probably have been found in specialist coach builders I suppose. A fascinating project with endless possibilities beyond wings.
Simon J
J3437 |
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