1984 Toyota Celica Gts

[BamZipPow]

...and what it looks like on my convertible.

[Sporty Modder]

Thats cool!

[Sporty Modder]

Doing some very rough measuring I concluded I need about 12" to meet the template if I keep the rear wing at the same angle as the rear deck.
Would it be better if I went past the template, even with the template or short with the wing?

[aerohead]

Originally Posted by Sporty Modder

Doing some very rough measuring I concluded I need about 12" to meet the template if I keep the rear wing at the same angle as the rear deck.
Would it be better if I went past the template, even with the template or short with the wing?

*when Kamei introduced their rear spoiler for the BMW(circa 1982) they pushed the trunk rear edge back such that a line down from the rear roof edge followed a 23-degree angle.A little steeper than 'Template' as per Buchheim's research.
*On the 911 Porsche RS America,they pushed back,with a small 'kicker' at the rear edge such that up to the roofline,it created a 13-degree angle,a little short of the 'Template' for where they were on the car.
*Lotus pushed their spoiler for the Esprit TURBO all the way to the 'Template.'(which wasn't very far)
*For the 1991 NASCAR Pontiac Grand Prix,they went half-way to the 'Template',up at a 33-degree angle 'kick' which produced a roofline-to-spoiler edge angle of 12-degrees at this point.
*The 1994 Dodge Viper Defender took their spoiler right to the 'Template' and quit there.
*The 1994 Saleen S-351 Mustang gently 'kicked' their spoiler up and back to the 'Template' and quit.
*The 1997 Dodge Viper GTS Coupe goes half-way to the 'Template' with a 'kicker' style spoiler angling up and back,generating a roofline -to -edge angle of 12-degrees.
*The 1999 GM Precept PNGV concept went half-way to the 'Template',going straight back.
*The 2001 Volkswagen new Beetle RSI racer goes a bit more than half-way to the 'Template' with a very gentle up-sweep,giving a roof to spoiler edge angle of 14.5-degrees,versus 57-degrees for the base car.
*George Poteet's "Blowfish" 1969 Plymouth Barracuda LSR car pushed his 'Bonneville' spoiler straight back,although I don't have a 'true-length image so I can't say where it ended up.He got to Cd 0.20 so it's pretty clean.It has a Gurney flap at it's rear edge,something you wouldn't need,so his drag would be lower without it.It does help safety at 255 mph though!
--------------------------------------------------------------------------
All these cars are worth a look,spoiler wise.

[Sporty Modder]

Thankyou aerohead, that helps with my decision. I think I will build this wing upswept to the template line but not past. I also am thinking about1/4" plywood, with fiberglass resin painted to match the car. And some aluminum supports

[aerohead]

Originally Posted by Sporty Modder

Thankyou aerohead, that helps with my decision. I think I will build this wing upswept to the template line but not past. I also am thinking about1/4" plywood, with fiberglass resin painted to match the car. And some aluminum supports

If you can splurge,try and score some marine plywood.It is extremely dimensionally stable and won't warp on you over time.Ever! The stiffness will help too, so you won't have to do a bunch of reinforcements.
Vorticity on top of the foil will induce it to 'dance' so the stiffness is a welcome thing.

[Sporty Modder]

Mk II in progress, unfortunately I cant splurge until I get a job. I got the plywood cut, and some aluminum channel around the back edge. This wing will be adjustable for angle of attack , mounted on the underside, using 3/4"x3/4" aluminum angle.

[Sporty Modder]

The rear deck has a 1" rise in 24" this if I am calculateing this right is a 4°upward slope.

[Sporty Modder]

MkII
Silicon between the aluminum and plywood.

[Sporty Modder]

Mounted, I still need to get some bolts and nylock nuts, primer, and paint.
On the car


Looking down the rear glass.

Inside mirror veiw


Initally it is just going to get painted then fiberglassed later.