Gordini Double Shaft Djet engine

AlexB

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I have to thank, and blame, @Russell Hall for the hours I've spent since his Gagarin Djet post.

I just love cutaway drawings and this Djet 1962/63 Gordini Double Shaft engine drawing is a beauty.
Pic is taken from Club René Bonnet Matra Sports-Djet website so may be subject to copyright considering the RBMS on the sump.

In the 1962 24 Hours of Le Mans the Djet car #46 with the 996cc Gordini double shaft motor lost 4th gear at 7:30am and spent the next 8 hours doing 8000rpm in third gear down Les Hunaudières (Mulsanne straight) to still finish with an average speed of 142 km/h, awesome stuff......



RBMS_Djet_Rene_Bonnet_Moteur-Gordini_double-arbre.jpg
 

AlexB

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The competition history of the Djet and the Gordini twin cam by Gerard Scherer is an awesome read that will enthrall you for hour upon hour.

Code:
translated link starts on Page 1 of 6, click on Page 2, 3 etc and they'll translate on the fly.
https://djet--rbms-fr.translate.goog/djet/histoire-djet-competition-debut/?_x_tr_sch=http&_x_tr_sl=fr&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc

Club René Bonnet Matra Sports Homepage
http://djet-rbms.fr/

translated homepage link
https://djet--rbms-fr.translate.goog/?_x_tr_sl=fr&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc&_x_tr_sch=http

More Djet history
https://www.classiccourses.fr/magazine/personnalites/djet-rene-bonnet-de-la-piste-a-la-route/

translated link
https://www-classiccourses-fr.translate.goog/magazine/personnalites/djet-rene-bonnet-de-la-piste-a-la-route/?_x_tr_sl=fr&_x_tr_tl=en&_x_tr_hl=en-GB
 

JohnW

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I have to thank, and blame, @Russell Hall for the hours I've spent since his Gagarin Djet post.

I just love cutaway drawings and this Djet 1962/63 Gordini Double Shaft engine drawing is a beauty.
Pic is taken from Club René Bonnet Matra Sports-Djet website so may be subject to copyright considering the RBMS on the sump.

In the 1962 24 Hours of Le Mans the Djet car #46 with the 996cc Gordini double shaft motor lost 4th gear at 7:30am and spent the next 8 hours doing 8000rpm in third gear down Les Hunaudières (Mulsanne straight) to still finish with an average speed of 142 km/h, awesome stuff......



View attachment 139259
Lovely. I agree with you. Such a superb mix of engineering drawing and art. Thanks for this. :)
 

4cvgordini

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And, concerning the regular pushrod Gordini hemi, a curious feature of its history is that (as I understand things) its first use was not in the R8G but in the CRB Djet (in 85bhp single downdraft carburettor form).

cheers! Peter
 

JohnW

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And, concerning the regular pushrod Gordini hemi, a curious feature of its history is that (as I understand things) its first use was not in the R8G but in the CRB Djet (in 85bhp single downdraft carburettor form).

cheers! Peter
Live and learn. Thanks Peter.
 

JohnW

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Any relation to the Boudot? Mind you, this one has gear driven cams and is on a Dauphine block. I know a guy near Seattle who has a full 60 year old, new-in-box Boudot kit.

View attachment 139497
Now that is one rare and valuable item!! I've seen one, new in box, in France. It now lives more actively in an A106 - my friend who owned it and installed it in the A106 says he much prefers to be paid to maintain it for someone else. Like the rare Gregoire suspension kits, I imagine these heads cost half as much as a new car!
Happy New Year to you and yours Mike.
 

4cvgordini

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Perhaps it's an I.P. thing but I have always wondered why people don't craft their own Gregoire rear suspension kit.
 

Bowie

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Gear driven cams are so cool!

And that DJET, what a beautiful thing. Thanks for sharing this.
 

4cvgordini

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Gear driven cams are so cool!

And that DJET, what a beautiful thing. Thanks for sharing this.
One might like the Djet's looks or not (obviously it's a totally subjective matter). Some find it overly narrow.
However it was not so much styled as crafted in a wind tunnel (Bonnet's partnership with aerospace manufacturer Matra had decided benefits). Road car Cd is .26 & the AeroDjet .24 & that narrowness (& thus low frontal area) no doubt assisted CdA figures.

Personally, I like its looks.

cheers! Peter
 

Bowie

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Yep! function over form any day of the week! Engineers, are just the coolest people.
 
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