55slug Seriously Crusin Dubber
169 posts · joined Jul 2006 ·
Im in Auckland mate. Prostock car I mentioned licensing passes next weekend... Prostock
When do you need a wing ?
modulus Veteran Volks Folk
2,009 posts · joined Jul 2003 ·
Back to the topic...
You may not ever need a (rear) wing. As a drag car, you probably don't need extra down-force (and drag) at the top end as you're not likely to be short of traction at higher speeds. However, a reduction of the lift caused by the beetle body design at high speeds is desirable, as the beetle's wing-like profile, coupled with a rather steep drop angle of the rear body, will create unwanted lift. This may be best resolved by a spoiler (rather than a wing) as Doug Sweetman and others have pointed out.
I can't find any *quantitative* information for the beetle, but *qualitatively*, I found these wind-tuft tests quite convincing in terms of separation of the laminar airstream (at least at 100 kph):
http://www.gerrelt.nl/section-aerodynamics/aerodynamics-wool-tuft-test.html
It would be great to reduce lift without the additional weight, bulk, drag and access complexity of a spoiler and relatively easy to perform back-to-back tests for efficacy.
hth
You may not ever need a (rear) wing. As a drag car, you probably don't need extra down-force (and drag) at the top end as you're not likely to be short of traction at higher speeds. However, a reduction of the lift caused by the beetle body design at high speeds is desirable, as the beetle's wing-like profile, coupled with a rather steep drop angle of the rear body, will create unwanted lift. This may be best resolved by a spoiler (rather than a wing) as Doug Sweetman and others have pointed out.
I can't find any *quantitative* information for the beetle, but *qualitatively*, I found these wind-tuft tests quite convincing in terms of separation of the laminar airstream (at least at 100 kph):
http://www.gerrelt.nl/section-aerodynamics/aerodynamics-wool-tuft-test.html
It would be great to reduce lift without the additional weight, bulk, drag and access complexity of a spoiler and relatively easy to perform back-to-back tests for efficacy.
hth
Dak-A-Tak Volksie Pete
1,381 posts · joined Jan 2004 ·
Were else do you put your tools and spark plugs ( holes) , chips & drink when woking on car . Wings are cool .
It isn't all about down force , but the sides all so helps to keep your car stable and straight at top end .
It isn't all about down force , but the sides all so helps to keep your car stable and straight at top end .
modulus Veteran Volks Folk
2,009 posts · joined Jul 2003 ·
Instead of a drink tray, for longitudinal stability you can do this:
1 attachment · Log in to view
LIFE IN THE LOW LANE All people have the right to stupidity but some abuse the pr
2,534 posts · joined Mar 2007 ·
Don't forget the muffins and for westi somewhere to put his cancer sticks and lighter lolDak-A-Tak wrote:Were else do you put your tools and spark plugs ( holes) , chips & drink when woking on car . Wings are cool .
It isn't all about down force , but the sides all so helps to keep your car stable and straight at top end .
ACCEPT THAT SOME DAYS YOU ARE THE PIDGEON AND SOME DAYS YOU ARE THE STATUE
Alder Outlaws VW Racing - check it out on fb!!
Alder Outlaws VW Racing - check it out on fb!!
dangerous 23 Windows of Awesome
5,901 posts · joined Jan 2005 ·
Can you tell us more about this Adrian?55slug wrote:Im in Auckland mate. Prostock car I mentioned licensing passes next weekend... Prostock
westi wrote:That's mad Alan.