Bugattibuilder.com forum • View topic

Herman · **Posted:** Sat Jan 01, 2011 8:43 pm

There are people who have welded frames, but these are considered inferior.

So frame longerons should be formed over a mould, to obtain an exact shape.

Marek · **Joined:** Wed Feb 13, 2008 5:47 pm **Posts:** 131

Marek · **Joined:** Wed Feb 13, 2008 5:47 pm **Posts:** 131

Herman · **Posted:** Sun Jan 23, 2011 3:18 pm

Yes, that is basicly what it looks like. Or use a (huge) press.

davids · **Joined:** Sat Dec 05, 2009 3:10 pm **Posts:** 143

That is a foto from the argentine workshops beating a chassis frame over a strong former.

Udolahr · **Posted:** Mon Jan 24, 2011 2:09 am

I did look at some argentina frames , this frames are not made this way .

davids · **Joined:** Sat Dec 05, 2009 3:10 pm **Posts:** 143

It says PS.A as foto reference lower left...and is on their web site....
David

Marek · **Joined:** Wed Feb 13, 2008 5:47 pm **Posts:** 131

Greg Morgan · **Joined:** Wed Aug 13, 2008 12:10 am **Posts:** 334

Someone who is very much in the know told me that when Hugh Conway put this tracing in his Grand Prix Bugatti book, he deliberatley made some of the radius different over the rear axle, to stop making it easy to copy.... All the info you need is shown at the front end, however.

Greg

HAL · **Joined:** Sat Jan 22, 2011 3:38 pm **Posts:** 4

Greg Morgan wrote:

Someone who is very much in the know told me that when Hugh Conway put this tracing in his Grand Prix Bugatti book, he deliberatley made some of the radius different over the rear axle, to stop making it easy to copy.... All the info you need is shown at the front end, however.

Greg

Well Greg, this may be true or not. I am afraid we can´t ask HGC anymore.

Fact is however, that many Molsheim factory drawings contain errors and/or have never been updated with the modifications that have evolved in the production.

He who thinks that he only needs a copy of a works drawing to replicate a spare part is doomed. One always needs the original (!) or in the best case several originals of the component to verify.

Knowing this, we can understand why many people in the past have tried to reproduce parts but failed.

nicefloor · **Joined:** Tue Jan 19, 2010 9:25 pm **Posts:** 50

Marek - though "inferior" I have successfully fabricated a frame from that drawing....even solved the conflicting radius issue in the back. E-mail me and I can tell you what I know about it.....

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Udolahr · **Posted:** Mon Jan 24, 2011 9:46 pm

I have the drawing with CAD ( dxf , dwg), made from the original Bugatti factory drawing

Marek · **Joined:** Wed Feb 13, 2008 5:47 pm **Posts:** 131

Udolahr · **Posted:** Tue Jan 25, 2011 11:18 am

some of the fotos are not real , propaganda .

Hugh Conway made deliberatley some of the radius different over the rear axle, to stop making it easy to copy !

This is just a story . He did not use CAD , and was not able to do it better . Today with CAD , I make the radiuses with plus-minus 0,001mm .

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