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Old 12-09-2019, 07:55 PM   #3341 (permalink)
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Originally Posted by Heel n Toe View Post
Costin-Nathan




Costin-Nathan GT
https://www.ultimatecarpage.com/car/...Nathan-GT.html

Quote:
Although the end-result looked little like anything he had designed before, Costin did incorporate many of the same ingredients found on his Marcos design. Most notable was his use of plywood for the centre section of the chassis. On both ends a tubular subframe was mounted to support the suspension and mid-mounted engine. One of the main reasons for the extensive use of wood was that it offered a strong, lightweight construction at the fraction of the cost of a similar aluminium chassis...................

Despite its very short career, the Costin-Nathan proved to be a very capable racer, but it failed to impress potential clients and left the scene almost as quickly as it burst onto it. The remaining examples still showcase Costin's unique talent for designing lightweight and very aerodynamic racers.
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Costin
Costinamigo
16-1-2003
"This car is actually a Costin-Nathan GT Coupe and was designed by Frank Costin who is the ""COS"" in Marcos. Frank's brother Mike is as indicated the ""COS"" in Cosworth. The Costin-Nathan was based on the design of the Costin Sports Racer, campaigned in California in 1965/66 by Norbert McNamara in SCCA events. The first Costin-Nathan was finished in 1966 as an open sports racer. The car was raced by Roger Nathan achieving class wins and lap records in it's first 6 races. In Paris for example, in October, Roger won the Coup'e de Vitesse having left the field far behind - including works Abarths. The Costin-Nathan GT Coupe, was initiated at the request of Roger Nathan, and Costin liked the idea because it would provide the opportunity to reduce aerodynamic drag even further than the open car. Most of the GT's were fitted with bored out 1 litre versions of the Hilman Imp engine, but some were also fitted with standard 850cc engines and some with 2 litre BMW engines. Roger Nathan in a 1 litre GT Coupe, captured 14 new lap records in 1967 and 1968 on his way to winning both the Motoring News and Total National GT championships. In 1967, Roger Nathan took over design and manufacturing of the Costin-Nathan and promptly re-named it the Nathan GT. Subsequently it was re-named again to Astra. Total production of Costin-Nathan's, Nathan GT's and Astra's was about 30 cars. Costin was responsible for about 6 open racers and 6 GT Coupe's. Costin later went on to design and build the Costin Protos and the Costin Amigo of which I have 3 of 8 built. During his career Frank Costin was involved in designs for Lotus, Maserati, Vanwall, TVR, Vauxhall and March not to mention the neumerous cars that he designed and built as ""Costins"". Regards Jonathon Till """

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Old 12-09-2019, 10:58 PM   #3342 (permalink)
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So now I'm thinking about a homemade plywood Cybertruck.
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Old 12-10-2019, 03:13 PM   #3343 (permalink)
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So now I'm thinking about a homemade plywood Cybertruck.
Plybertruck?
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Old 12-10-2019, 03:54 PM   #3344 (permalink)
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The Tesla CYBRTRK is an interesting aerodynamic vehicle:






https://www.greencarreports.com/news...-suggests-musk
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Old 12-10-2019, 04:09 PM   #3345 (permalink)
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It looks like it would evade radar, at least.
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Old 12-10-2019, 10:26 PM   #3346 (permalink)
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Quote:
It looks like it would evade radar, at least.
That's an interesting point. When I looked at radar-proofing cars, the last big problem was the headlight reflectors. The LED lighting and front chamfers would reduce the signature.
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Old 12-11-2019, 02:18 PM   #3347 (permalink)
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That's an interesting point. When I looked at radar-proofing cars, the last big problem was the headlight reflectors. The LED lighting and front chamfers would reduce the signature.
I think that the actual intent is to borrow the glamour of the latest military hardware. The 50s had a lot of styling borrowed from fighter aircraft, and when they went supersonic, that was copied too, completely out of place.
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Old 12-11-2019, 04:27 PM   #3348 (permalink)
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I think that the actual intent is to borrow the glamour of the latest military hardware.
Reading minds is a loser-think game. I suspect the design was derived from first principles along the lines of an arthropod shell. The skin is 3mm thick. The inner structure is conventionally thin. This puts mass where it is most efficient.

The unpainted shell with 'metal glass' windows will be essentially immortal.
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Old 12-11-2019, 04:40 PM   #3349 (permalink)
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Quote:
Originally Posted by freebeard View Post
Reading minds is a loser-think game. I suspect the design was derived from first principles along the lines of an arthropod shell. The skin is 3mm thick. The inner structure is conventionally thin. This puts mass where it is most efficient.

The unpainted shell with 'metal glass' windows will be essentially immortal.
Shells are never flat or faceted, but curved to spread impact loads. The Citroen 2CV and Ford Trimotor used corrugated steel to get sufficient rigidity from thin sheets. Steel, being dense, is very inefficient as a flat panel unless it is used as faces on a sandwich with a suitable core. A plywood panel would be equally hammer-resistant at much lower weight.
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Last edited by Bicycle Bob; 12-11-2019 at 04:41 PM.. Reason: extra word
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Old 12-11-2019, 05:29 PM   #3350 (permalink)
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Hence my comment at Permalink #3342

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