tom_loughlin
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 posted on 12/11/04 at 12:55 PM |
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modelling
heres my 1st attempt at 3d surface modelling a locost, thought id share it with u guys.
next jobs are to model the small stuff (lights/wishbones/seats etc..) then im going to export it to CFX5.7 to perform virtual aerodynamic tests on
it.
the aim is to reduce the Cd hopefully to ~0.3. to achieve this, substantial bodywork mods will be needed, but hopefully wont neew to change the layout
of the chassis.
any coments/suggestions welcome
cheers,
tom
 
Rescued attachment caterham.JPG
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Peteff
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| posted on 12/11/04 at 01:14 PM |
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You asked...
The front to back proportions look wrong and the nosecone is small and pointed for a Locost. I don't think you'd get an engine and
radiator in there.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Volvorsport
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| posted on 12/11/04 at 01:14 PM |
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0.3 is unachievable with an open wheeled car .
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MikeR
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| posted on 12/11/04 at 01:26 PM |
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Caterham have made improvements with their latest car. Inboard suspension and a modified cycle wing have helped.
Also no matter how much you want to reduce drag, i'd put a proper roll bar on the car. Low drag and dead is not much use!
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Hellfire
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| posted on 12/11/04 at 03:53 PM |
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Yeah proportions are way wrong m8...
not bad for first attempt though - don't give up your day job though!!!
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andyps
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| posted on 12/11/04 at 08:40 PM |
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I would think that to achieve a cd of .3 you would need to enclose the wheels pretty much completely, and then do lots of other work too - very few
production solutions get this low.
Andy
An expert is someone who knows more and more about less and less
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flyingkiwi
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| posted on 13/11/04 at 05:31 PM |
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Didn't cateringham nearly bankrupt themself's trying to improve the 7 design?
Just remember something on the telly about it.....
It Runs!!!!! Bring on the SVA!
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12a RX-7
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| posted on 13/11/04 at 06:47 PM |
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best solution I would have thought is the fury/ginetta type shape
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Mark Allanson
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| posted on 13/11/04 at 09:07 PM |
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If its any help, the Cd of a std caterham with screen is 0.65
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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andyps
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| posted on 13/11/04 at 09:58 PM |
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quote:
Originally posted by Mark Allanson
If its any help, the Cd of a std caterham with screen is 0.65
Thanks Mark - I knew it was rediculously high, but couldn't remember the figure.
Andy
An expert is someone who knows more and more about less and less
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ayoungman
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| posted on 17/11/04 at 05:34 PM |
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surface modelling
I'm in the process of modelling an entire car using a CAd package called ProDesktop. I've done the chassis and am now assembling the
wishbones and diff. Only taken me 34 hours so far. Looks go when you rotate it on screen though !
"just like that !"
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skinny
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| posted on 18/11/04 at 11:40 AM |
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quote:
Originally posted by flyingkiwi
Didn't cateringham nearly bankrupt themself's trying to improve the 7 design?
Just remember something on the telly about it.....
i think the consultancy company they used went bankrupt during development. but now they have used some of that project like the front wings, lip on
the nose, thru-flow bonnet vents from nose and inboard suspension, aerodynamic wishbones. i am not sure if they still have a venturi tho.
as far as i know, they are planning to sell this car (but i'm not sure...)
if you don't fail, you aren't trying hard enough.
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