Not sure what you mean by just a story Udo, but for what its worth, I can draw the chassis rails in cad to an accuracy of 0.000000000, but I thought on an earlier thread you said you objected to using modern methods (cnc, etc) to make a Bugatti.

How nice for you , but I do not feel responsible for your problems .

Can you all be a bit more nice to each other, please?

_________________
Vive la Marque !!

.

.

.

Very nice work.Ivan Dutton has been supplying lostwax castings like these for twenty years.I was always impressed by the quality.He does the radius ends as well.

Very nice, I love to see the process. Keep on posting!

_________________
Vive la Marque !!

.

Very nice work indeed ! Its good to see. Keep up the good work and keep sending pics.

Very impressing work! How did you make the wax forms for the parts? In a silicone mould?

.

your correspondents have failed to state whether the dimensions of the rear part of the chassis as shown on the drawings are the dimensions on the developed face of the chassis or the dimensions projected unti the centre plane. There would be a difference of about 12mm - 15mm which would render 'computer' accuracy futile.

I have,over the years collected measurements from several genuine chassis and they are all appreciably different!

David Russell

How come these are different?

-I presume these were hammered over a steel mold, or pressed over a steel mold.

-were there different moulds?
-did these cars have accidents?
-were they produced in another way?

Trying to learn...

_________________
Vive la Marque !!

Regarding the dimensions of what were presented to me as original chassis, there was up to 5mm difference in some of the detailed dimensions. I would be amazed if Molsheim hammered hot sheet steel around formers to produce their chassis, I always thought that they went out to specialists to have them pressed out in 150ton presses much as Gino Hoskins makes them today. Changes in dies or bending in plan might account for dimensional discrepancies. Incidentially I tried to make chassis in the Phillipines years ago see photos (if they reproduce) but they required a tremendous amount of oxygen and the metal went each way and everyway. With an ambient temperature of already 40degs. the workers didn't like the process too much. They are still in the Phillipines in the jungle somewhere should anybody like to retrieve them! I remember that the 4mm steel was purchased from a shipyard where they unrolled the required length from a huge roll that must have weighed many tons.

The late Alan Wragg in the UK used to keep chassis-making for the cold winter months. I now live in Thailand and have just made 4 chassis by laser-cutting the blanks very accurately, folding the straight bits in a press and welding in the curved parts of the flange. Once fettled they look superb - as good as Gino's creations and cost only a fraction.

I also enclose photos of front axles that I also attempted to make in the Philippines. The turned blanks were bored in a gun drill and the ends forged. Again heat was the problem as it was difficult to get the bends in the ends the same without deforming the 'tube'.