Author Topic: Spoiler construction  (Read 24429 times)

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Offline wheelrdealer

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Re: Spoiler construction
« Reply #15 on: December 29, 2015, 09:16:23 PM »
....What I wanted was what Sumner said as much spill plate as possible..



Was there a reason you slopped the spill plates down?  I think they could of been higher in the front giving more area that would help the CP.



The spill plates on the car above could of also been made larger.  It is tempting to change the shape to make them more pleasing to the eye but I'd make them as large as the rules allow and the hell with looks,

Sumner

Sum:
They are level horizontally front to back,  it's just the angle of the shot. here is another shot of the finished spoiler with the car level on jack stands.

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Offline SPARKY

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Re: Spoiler construction
« Reply #16 on: December 29, 2015, 09:35:52 PM »
at 300 it is REAL nice when the car goes where you are wishing it to!
Miss LIBERTY,  changing T.K.I.  to noise, dust, rust, BLUE HATS & hopefully not scrap!!

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Offline manta22

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Re: Spoiler construction
« Reply #17 on: December 29, 2015, 10:05:24 PM »
Here are two photos of Rex Svoboda's beautiful McLaren M6GT showing airfoil & spill plates.  He said the car was very stable at 200mph.

Regards, Neil  Tucson, AZ
Regards, Neil  Tucson, AZ

Offline javajoe79

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Re: Spoiler construction
« Reply #18 on: December 30, 2015, 11:01:30 AM »
I bet that Mclaren is nailed down at 200mph!!
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Offline Sumner

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Re: Spoiler construction
« Reply #19 on: December 30, 2015, 04:25:01 PM »
....They are level horizontally front to back,  it's just the angle of the shot.

I was wondering if that might of been the case.  They look good,

Sum

Offline Rex Schimmer

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Re: Spoiler construction
« Reply #20 on: January 04, 2016, 03:37:54 PM »
One thing about having the spill plate being triangular in shape similar to the McLaren that Neil provided is that this shape when it become side ways to the air flow, as in the. rear end getting loose, it will generate a huge amount of aero force that opposes the spin force of the car. The "delta" shape is extremely efficient and works by generating a very strong vortex on the opposite side of the spill plate that generates the differential pressure on the plate that opposes the spin forces.

Rex
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Offline 631

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Re: Spoiler construction
« Reply #21 on: January 04, 2016, 11:24:02 PM »
The Mclaren being mid engine had a rear bias CG so we had to add vertical side surface to chase the CP rearward and keep the car stable at speed.  The 'wing' was more for structural strength as down force which it turned out we did not need at Bonneville.  The wing helps a bit when running the Silver State road racing events but with only 450 available engine hp we had enough traction on the salt without the help of a wing.  The car was very stable on the salt and easy to drive even in heavy cross wind gusts.  I have Fond memories of looking out the big picture window going down track on a sunny Bonneville morning.
It's all about the air

Offline redhotracing

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Re: Spoiler construction
« Reply #22 on: January 18, 2016, 09:16:31 AM »
Joe-

We built ours ('98 Camaro) using the same approach (#1) you're considering (1/8" aluminum on the spill plates) but without the adjustable "flap". It certainly helped with down force; probably TOO much for a mile car. With the speeds you'll be approaching with that car (and Production being out of the question due to the turbos), you may as well build one large enough to help your down force and stability. Just my .02.
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Offline SPARKY

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Re: Spoiler construction
« Reply #23 on: January 18, 2016, 12:16:37 PM »
If you mounted your roof flaps at 45 deg to centerline you should have room for two shouldn't you? that way they come out before you go 180 rotation.
Miss LIBERTY,  changing T.K.I.  to noise, dust, rust, BLUE HATS & hopefully not scrap!!

"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing."   Helen Keller

We are going to explore the racing N words NITROUS & NITRO!

Offline javajoe79

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Re: Spoiler construction
« Reply #24 on: February 02, 2016, 09:59:31 AM »
If you mounted your roof flaps at 45 deg to centerline you should have room for two shouldn't you? that way they come out before you go 180 rotation.
Maybe but probably not at their current size. The roof is just too narrow and curved so they also don't fit the profile.
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Offline tauruck

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Re: Spoiler construction
« Reply #25 on: February 02, 2016, 10:09:23 AM »
Some where on my truck build I have photos of my NASCAR type flaps.
I do know some of the teams actually sell roof flaps with hinges and tethers.
Check it out. You might find a solution. :cheers:

Offline Buickguy3

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Offline tauruck

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Re: Spoiler construction
« Reply #27 on: February 06, 2016, 08:10:01 PM »
Good deal at $69. :cheers:
Nice one Doug,

Offline redhotracing

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Re: Spoiler construction
« Reply #28 on: February 08, 2016, 09:56:21 AM »
Muscle Motorsports in Huntersville/Mooresville, NC has roof flaps (and a lot more
NASCAR parts). The late Bob Gribbel (sp?) put together a really nice resource for
LSR guys; always worth a call if you need something hard to find.
Luke- Winston Salem, NC
Loring 2 Club- 201.252 (2010)
Ohio 2 Club- 203.712 (2013)

Offline javajoe79

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Re: Spoiler construction
« Reply #29 on: February 15, 2016, 12:37:21 PM »
We have exactly what is in that link ^^  They're huge
Coffey Fabrication and Race Prep
313 Wilhagan Rd Nashville, TN 37217
615-210-1605

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