Cerbera Speed 12
Discussion
The central tub from the front engine bulkhead to the rear bulkhead is made from carbonfibre and aluminium honeycomb laminate sandwitch (this is not something you can eat!)around a substantail roll cage. The engine and front suspension is all bolted to a tubular steel frame which bolts on to front bulkhead via some very large bolts. (Just like Jaguars D,E types) The rear suspension is also bolted onto a seperate tubular steel frame which bolts to the rear bulkhead. Also the central tub is possably lighter in weight.
Presumably the reason for doing it this way is in the even of an accident you hopefully only end up with a bent front or rear suspension frame which if you carry a spare you unbolt and replace with the new one, where as if you just has a stanard tubular steel chassis if you bent it badly enough your racing would be over for the weekend.
I'm sure making the whole tub from carbon fibre etc. would be both lighter and stronger/stiffer - obviously highly desirable characteristics.
However it'd also be more expensive and, probably more importantly, make access to the engine and suspension more difficult (very important - as Ted said).
So it's a hybrid solution to best meet the different objectives of a (limited budget - relative to the Ferrari F1 team) racing car......
.....as usual I have absolutely no basis for any of the above statements of 'fact' other than it sounds reasonable to me
Mike.
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