Gav-locoblade
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| posted on 30/10/05 at 09:53 AM |
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Rear Spoiler
I have noticed that a lot of the mid engined cars have rear spoilers but the the sevens don't. In my opinion a seven needs to have a rear
spoiler more than a mid engined car to get some weight down on the rear. Is there a reason why they don't? I don't think that styling
would be a big issue because you can get some nice looking spoilers. (Just tall enough to stand above the rear wings) Not some big boy racer whale
tail. Do's anybody have any opinions on the subject.
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Peteff
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| posted on 30/10/05 at 10:55 AM |
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you can get some nice looking spoilers
That's all they do though. In my opinion it's like fitting one to a brick, a bit of a cosmetic excercise. Unless it's wind tunnel
designed and tested on a seven there's nothing to say it's going to improve your handling.
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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Avoneer
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| posted on 30/10/05 at 11:25 AM |
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Why would you want to get the weight down at the rear?
There's very rarely a problem with traction.
Good example:
My friend had a highly tuned MR2 urbo number - big spolier on the back. Couldn't hit 60 in under 4.5 due to lack of traction.
Most BEC 7's will hit 60 in around 4 or less without any traction problems.
So why the need to increase the downforce at the rear?
Pat...
No trees were killed in the sending of this message.
However a large number of electrons were terribly inconvenienced.
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lsdweb
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| posted on 30/10/05 at 12:03 PM |
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I'd agree that a rear spoiler will have little effect unless properly engineered!
I'd disagree about a lack of traction! My live axled car, with TranX LSD will, if prompted, spin the wheels in four gears in the dry!
It'll step out of line when changing up into fourth in the wet unless I'm really careful!
Regards
Wyn
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scotty g
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| posted on 30/10/05 at 12:53 PM |
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Any spoiler won't make the slightest bit of difference to a 0-60 time as its function is to increase downforce at higher speeds to keep tyres
stuck to the road during cornering, from a standing start a spoiler will give zero downforce as there is zero forward momentum. Locosts don't
tend to suffer with major handling problems anyway.
I think the strongest argument for not having a spoiler on a Locost is simply that it will look bloody terrible.
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liam.mccaffrey
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| posted on 30/10/05 at 01:15 PM |
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does anyone find the fact that they're called spoilers slightly ironic
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MkIndy7
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| posted on 30/10/05 at 01:33 PM |
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I'm sure it was 1ce asked of the Touring Car teams why there cars have such big spoilers since there FWD, wouldn't that actually tend to
lift the front wheels?.
Aparently there needed for high speed corner stability, over 90mph I believe they said.
(A long corner, slicks, a bloody strong grip and some fearsome driving to achieve that in a 7!)
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Volvorsport
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| posted on 30/10/05 at 01:55 PM |
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a seven with its light weight , will accelerate / handle better because everything takes less energy to do so .
they generally have enough mechanical grip to cope with the load put through the tyres .
high power cars , which can light the tyres up , generally accelerate quicker from 60-90 , because with downforce the tyre is able to generate more
grip .
of course thats a generalisation .
most sevens dont need a huge amount of power to out perform other cars .
i agree there might be a lot of lift generated by the drag of the body at high speed , if you attempt to design for pressure recovery to reduce drag
and lift - youll end up with a nice coupe design !!
there is one place though that you can consider like a race car and thats the underneath , since its quite flat .
detail changes and such would have a good effect .
thinking logically about the places where a decent airflow could be used to good effect , there isnt many .
top of the roll bar is a nice place , but thats outlawed in competition !!
www.dbsmotorsport.co.uk
getting dirty under a bus
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Gav-locoblade
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| posted on 30/10/05 at 04:39 PM |
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It's not the traction on 0-60 I was thinking about it was the high speed cornering I had in mind, Surely pushing the rear down has to help in
some way. It may not look good but I've seen some odd seven inspired track cars.
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MikeR
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| posted on 30/10/05 at 05:35 PM |
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remember a commnet from Volvo a few (ok probably 10) years ago when they raced the estate cars.
The difference between the estate and sedan was so marginal that they raced (and frequently won) the estate model for PR reasons. They only moved to
the sedan model when the rules on a rear wings where relaxed - only then would it outperform the estate.
(sorry about the lack of seven / rear wing relevence, just liked the story)
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caber
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| posted on 30/10/05 at 05:35 PM |
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I think a 7 would look pretty cool with the wings Lotus put on the 49 first time out! you could even folow the Chapparral idea of mounting them on the
wheel uprights to get all the downforce onto the road rather than compressing suspension!
The area of the wings would need to be pretty large to give downforce at 7 speeds, I guess effective speed should start around 50mph
Caber
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JoelP
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| posted on 30/10/05 at 05:52 PM |
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there was a red indy at elvington with a spoiler on it, looked very nice IMHO.
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Wadders
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| posted on 30/10/05 at 06:23 PM |
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Sorry, but i strongly dispute this much used
bit of info.
Originally posted by Avoneer
Most BEC 7's will hit 60 in around 4 or less without any traction problems.
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iank
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| posted on 30/10/05 at 07:00 PM |
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quote:
Originally posted by caber
... you could even folow the Chapparral idea of mounting them on the wheel uprights to get all the downforce onto the road rather than compressing
suspension!
...
Caber
Weren't they banned in motorsport after some nasty accidents?
Though while it's working I'd imagine it to be the most efficient way of doing a rear spoiler (short of the sucker cars).
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Volvorsport
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| posted on 30/10/05 at 07:04 PM |
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hmm , not sure if it was lotus who penned the wings on stilts on the hubs .
AFAIK the hubs were never the failure point .
the roll bar would be most logical at rear - but you wouldnt be able to compete with it
www.dbsmotorsport.co.uk
getting dirty under a bus
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Cita
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| posted on 30/10/05 at 08:02 PM |
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Why not ask Micke with his trike if that rear wing makes any difference.
If he can create enough down force to improve grip on his single wheel than that same downforce would help on a 7,not as dramatically but
nevertheless.
Cheers Cita
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