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DeDion

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fshbydesign.com

Wore out three sets of tires already!
Saw this DeDion in my travels today. Looks like frame and fork only, but awesome head bage!



IMG_20191021_095338467.jpg


IMG_20191021_095342781.jpg
 
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Thanks very much for sharing this! ;)

They became famous for their suspension systems for sports cars.

Were you able to identify the bare metal frame in the second image?

Appears lugless but cannot quite be sure...

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Example believed to date from ~1939 -

De Dion Bouton  headplate  .jpg


De Dion Bouton driveside  .jpg


De Dion Bouton head  .jpg .jpg


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Factory from 1924 -

De Dion Bouton1 924 factory  .jpg

Some company history here -

https://en.wikipedia.org/wiki/De_Dion-Bouton

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Thanks very much for sharing this! ;)

They became famous for their suspension systems for sports cars.

Were you able to identify the bare metal frame in the second image?

Appears lugless but cannot quite be sure...

---

Example believed to date from ~1939 -

View attachment 1082625

View attachment 1082626

View attachment 1082627

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Factory from 1924 -

View attachment 1082629
Some company history here -

https://en.wikipedia.org/wiki/De_Dion-Bouton

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Yes, that is the DeDion side view
 
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of course, DeDion is famous for their triangular rear suspension design, 1905, originally to make a roll-proof tricycle, but the design found its way into a few sticky automobiles, as well.
paint.jpg
 
That's quite a thumper.
Through the 50s, DeDion was the only rear suspension used in Formula 1.
Even though the suspension was designed by Bouton, DeDion has always received the credit for the patents.
SZ-RZ_09-e1421058445176.jpg
 
That's quite a thumper.
Through the 50s, DeDion was the only rear suspension used in Formula 1.
Even though the suspension was designed by Bouton, DeDion has always received the credit for the patents.
View attachment 1108532
Shakes like an earthquake when idling. This single will smooth out and rev to around 1600 rpm! Light weight and it flies. More of an issue to hang on and hope the brakes are dry and willing! Rear brakes are for emergency. It has a driveshaft brake that does most of the work.
 
btw, it wasn't that DeDion ever produced sports car suspensions, considered them, or even used the suspension design in their own automobiles
Bouton designed it to make a tricycle roll-proof.
-Drawing_of_1900_De_Dion-Bouton_tricycle_rear_view.jpg

The dead axle rear suspension produced such high roll center (SAE racing barstools) for such low unsprung weight, once the patents expired, it was adopted by every automobile employing a prop shaft and rear transaxle and pushing the envelope, up until Cooper Climax demonstrated that with good geometry, independent double-A-arm rear suspension could get there with the edge of lower weight.
And still used on the Alfa Six, earlier and later variants.
 
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