All Things Mk5 > Performance Modifications
improving aerodynamics with OEM parts
RedRobin:
--- Quote from: the bruce on January 10, 2011, 11:45:33 pm ---
My main motivation was reducing aerodynamic lift at the rear (~ 35 kg @ 200 km/h) for better
stability when high speed cornering. I don't like huge wings, so I went for invisible parts.
--- End quote ---
....Invisible wings, huh? But will they make your baby fly? :evilgrin:
Btw, we don't get much opportunity to enjoy autobahn high speeds in the UK :sad1:
the bruce:
I'd try these one underneath my car. Any tipps for fitting them at the right place? :signLOL:
:congrats: As you see - wings add safety !! :happy2:
Perhabs you have more race tracks in the UK. And high speed on autobahn becomes boring in the long run.
Safety and noise emission regulations make it hard to in germany to converse former airbases to race tracks.
cmdrfire:
--- Quote from: richwig83 on December 22, 2010, 05:16:21 pm ---Does anyone know if the 'golf ball' pattern actually makes a difference?
--- End quote ---
The dimples do make an improvement aerodynamically, primarily by inducing a lowering of the drag coefficient by improving the Reynold's number:
As a note, maybe 10-15% of an "eco" car's efficiency gains are from improved aerodynamics on the underside.
Remember though that increases in aerodynamic downforce also result in increases in drag, making the vehicle less efficient and and reducing vmax.
I saw a few years ago on one of the American forums someone had fitted an undertray and a crude diffuser which he said improved high-speed stability; something which is entirely plausible, but which lacked any form of quantiative testing.
Undertrays designed to reduce drag will not, in my opinion, improve high-speed stability.
RedRobin:
^^^^
Still pissing excellence I see, Neo!
Now stop all that and get on progressing the LED tails project :laugh: :evilgrin: :wink: [I got your txt -Ta]
the bruce:
Thanks for the pic. :happy2:
--- Quote from: cmdrfire on January 14, 2011, 06:41:49 pm ---Remember though that increases in aerodynamic downforce also result in increases in drag,
making the vehicle less efficient and and reducing vmax.
.....
Undertrays designed to reduce drag will not, in my opinion, improve high-speed stability.
--- End quote ---
Yes, but we talk about reducing our Golfs' lift. There's no chance for real downforce. :wink:
These undertray parts reduce turbulences and these tubulences cause both - drag and lift.
A smoother undertray helps getting a laminar air stream. The smoother, the faster the air
will pass the car's underbottom. The faster the air, the less drag and lift.
Just advantages, no problems. Just my 2 cents. :happy2:
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