Selfmade Bodywork

feeds@yuku.com (Sam) — Sun, 29 Nov 2009 14:25:27 GMT

As you know I m working on every corner of my racer , therefore i would interested in detailed pictured explanations on how to build your own bodywork.
Something which is possible to be done at home.
My basic idea was to hot wire cut a positive out of Styrofoam and then make a negative mold to finally do my first bodywork.
But that's only theory.......
Who can give me some practical info's and pics.
Thanks in advance
BRGDS
Sam

Tunnels question

feeds@yuku.com (proutyc) — Mon, 26 Oct 2009 14:42:45 GMT

I've been reading with interest on the talk of the new style rear wing (tunnels extractors) and how they really require additional front aero.

To me this would suggest that the existing tunnel has too much rear bias. I thought that the start of the growth on tunnels is its highest pressure area so would it be beneficial to move this centre of pressure forward therefore reducing the need for new front ends (unless the new front reduces drag)?

The reason I ask is that...

Cooling duct drag penalty

feeds@yuku.com (kiwimanz) — Sun, 23 Aug 2009 22:26:10 GMT

Does any one have opinion of the drag / cooling efficiency of side ducts apposed to top mounted (Storh's Style) cooling ducts?

cheers
Lindsay

First wing

feeds@yuku.com (csp54) — Mon, 10 Aug 2009 01:45:58 GMT

Trying this again, my first attempt just went into the never-net

So we have the new car about ready for some real testing

Its a modified Legrand body on a flat bottom tub, Shes about 4 inches wider than a stock legrand, and about 12 inches longer based on the body mods that were already done.All we have done so far is properly mount the body, and build the...

Chassis rake

feeds@yuku.com (kiwimanz) — Thu, 30 Jul 2009 23:34:29 GMT

Now after installing tunnels and the diffusers, should I run less rake on the chassis?
Your expert opinions are very much appreciated
Cheers lads
Lindsay

Tunnel obstruction

feeds@yuku.com (MCalvert) — Sun, 28 Jun 2009 16:45:59 GMT

Here is my issue, I picked up a set of carbon floors with tunnels. (They were never used, so how effective they are is unknown, but they are pretty) Everything is a perfect fit, routes along the frame, curves in beside the engine and out the back. The height of the tunnel as it passes the rear suspension puts the half shaft through the top of the tunnel almost against the roof. Is it better to run the tunnel under the half shaft then taper upwards (lowers the top of the tunnel approx...

wheels and tunnels

feeds@yuku.com (kiwimanz) — Fri, 26 Jun 2009 01:33:49 GMT

Sounds like a Rolling Stones Album... actually I'm curious to any one's opinion of how much a rotating tyre will affect the advantage of tunnels. I'm installing tunnels and diffusers but concerned how far out board I can install the tunnels and not have the front wheels mess up the passage of air entering the tunnel.

Cheers lads
Lindsay
taking the path less traveled....

Karter has airo question

feeds@yuku.com (Jeff Mott) — Thu, 04 Jun 2009 10:12:35 GMT

I race a laydown enduro kart. Per the WKA rulebook no aerodynamic wings or diffusers are allowed. My question is with a flat bottom floor pan running the lenght of the kart would there be any downforce generated by "dimpling" the aluminum? Those of you who know these karts also know that they are open on top and the back end is open. Would it help to dimple the inside of the floor pan where it extends out to the back?

Dauntless Racing Sportsracer Wing

feeds@yuku.com (Matt Graham) — Mon, 01 Jun 2009 09:46:12 GMT

Fellow Sportsracers,

Wanted to make a quick post to publicly thank and recommend Dauntless Racing. Back in March I put my SR3 into the wall backwards at VIR, destroying the factory rear wing. I investigated several sources for rear wings (including Radical) and found that Rennie and Duantless was both the easiest to deal with and the cheapest outright. When considering on top of that the construction and R&D that have gone into the wing, the decision was a no brainer. I was...

WF-1 diffuser on 1st-gen cars

feeds@yuku.com (Jake Latham) — Tue, 28 Apr 2009 11:33:35 GMT

Hi All -

Quick question for the collective experience out there. For those that have added a WF-1 style front diffuser to their 1st-Gen Stohr, did you notice any change in oil/water temps?

I've heard some scuttlebutt here and there that it changes airflow over the top of the car a bit, and makes it harder to keep the cars cool. Has anybody experienced this that can chime in yay or nay?

Cheers!

-Jake

downforce

feeds@yuku.com (jrawson) — Wed, 15 Apr 2009 11:21:15 GMT

Is downforce linear? If you have downforce at two speeds can you plot a simple graph that will give you the downforce at all speeds???

Jim

Aero 101

feeds@yuku.com (Derek Harling) — Tue, 07 Apr 2009 21:00:08 GMT

Never too old to learn (and I bet others will benefit too).

(Picture borrowed from Stohr website)

What is the purpose of the notch in the top of the end plate?

I understand (I think) that the air flow accelerates under the wing thus reducing pressure and creating downforce.
Also (I think) the deeper the end plate the less air is sucked in under the wing...

Wing end plates

feeds@yuku.com (Dean Todd) — Sun, 22 Feb 2009 16:11:07 GMT

On NASCAR Performance today they had an explanation of their wings. Their discussion included wing angle and Gurneys, things we all well understand, but their discussion of end plates was very interesting. They are mandated flat end plates at restrictor plate tracks, but have a lot of freedom on shorter tracks.

They can add a 3/8 Gurney to the trailing edge on the flat end plates, and even cut them to a partial length to adjust side force, or run a curved end plate to tune side...

New rear wings

feeds@yuku.com (Ren) — Thu, 19 Feb 2009 02:47:17 GMT

Hey everybody - we recently added a new 4' x 8' CNC machine to our shop so we can do rapid prototyping and plug machining from CAD designs, and the first finished products are hot off the presses. This new CNC machine has really let us get "out there" with new part designs and the surface quality is just incredible - smooth compound curves and all kinds of complex surfaces. We spent a couple of months designing this new sports racer rear wing - two custom-designed airfoil...

Some 2009 F1 rule changes explained

feeds@yuku.com (ted arken) — Tue, 17 Feb 2009 19:13:53 GMT

Cool youtube video, not too long.

http://www.youtube.com/watch?v=-dzSBtmytmk

Streamlined Aluminum Extrusions

feeds@yuku.com (fatoldman7) — Fri, 13 Feb 2009 14:42:42 GMT

Found this web site: www.carlsonaircraft.com/ Looks like some of there products would be useful to racers.

Nose / Sidepod design

feeds@yuku.com (MCalvert) — Tue, 03 Feb 2009 18:52:47 GMT

This is a part aero question and part rules interpretation question. But here goes.

For the car I am building, I got a hold of a nose off a Star Mazda SR. It is shaped similar to the current noses on the Stohr' etc. The difference being is the front is open, with wings between the nose and the wheel wells. The problem I see with this design is that it creates high pressure under the body work. The newer bodies I have seen have the front sealed off, but still have slot in...

Air tabs/vortex generators

feeds@yuku.com (bob wheless) — Mon, 02 Feb 2009 15:45:47 GMT

Any thoughts on using these vortex gen. on a race car? Seems like they could be useful if one understood enough to begin to play with them. Any of our aero people have any thoughts or do I just spend that money on race beeeeeeer.... thanks for your thoughts,,,,,,,bob

Dive plane function

feeds@yuku.com (kiwimanz) — Wed, 28 Jan 2009 02:49:54 GMT

While educating myself on the aero elements of my car, can anyone lend their knowledge of what dive planes actually do for a car?
Thx

CSR/DSR underfloor images?

feeds@yuku.com (dgiblet) — Mon, 19 Jan 2009 17:32:27 GMT

Appologies if this has already been asked, but where can I find pictures of CSR/DSR underfloors/undertrays? I don't expect theirs one sight, but I thought I'd recently scene images of the West or Stohr and I can't seem to locate where i saw them in my history. Any suggestions?

Aerodynamics