my TIGRA AERO PROJECT

[fabrio.]

Originally Posted by basjoos

The Loremo and the Daihatsu UFE-III have long boattails behind their rear wheels, so I just made a shorter version of theirs using the same taper I used for my car's boattail. I made the taper different on the 2 sides of the mini-boattail so it would help to direct air under my car's boattail. I made the mini-boattails out of sheet aluminum, cut and pop-riveted to form a triangular box that I pop-riveted to the bottom of my car.

I look to long time shape of Loremo, UFE but also your car that are the best theaching.
About your boattails, I am not sure, but I understand that this below is the them shape:



He is correct?

Question, if I putt the boattail whitout the side skirt, I can find any improvements?

[fabrio.]

Originally Posted by Otto

Why not make the boat tails out of spray foam like Great Stuff canned insulation? It can be shaped, sanded, sculpted, painted, etc.. ~$4 to ~$5 per can, this should be enough for one car. If you hit a curb while parking, no big deal.

great idea, but how anchor it?.

[basjoos]

Originally Posted by fabrio.

I look to long time shape of Loremo, UFE but also your car that are the best theaching.
About your boattails, I am not sure, but I understand that this below is the them shape:



He is correct?

Question, if I putt the boattail whitout the side skirt, I can find any improvements?

My rear wheel boattail has 2/3 of the taper on one side and 1/3 of the taper on the other side. Since your car doesn't have a boattail on the back of it, you could use a symmetrical rear wheel boattail. The wheel boattail will work with or without a side skirt since your rear wheel will be always be producing a eddy behind it unless you put a boattail there.

[Otto]

Originally Posted by fabrio.

great idea, but how anchor it?.

The problem is to remove it, not to anchor it: That stuff sticks to everything it touches.

Probably best to use a separating barrier that the Great Stuff will not stick to, like Saran Wrap of plastic that will conform to the shape of the car, and make a base. Then, built up and sculpt the base into boat shape.

You could use some aluminum screen in the Great Stuff, to make an internal hard point for attaching to the car.

[fabrio.]

Originally Posted by basjoos

My rear wheel boattail has 2/3 of the taper on one side and 1/3 of the taper on the other side. Since your car doesn't have a boattail on the back of it, you could use a symmetrical rear wheel boattail. The wheel boattail will work with or without a side skirt since your rear wheel will be always be producing a eddy behind it unless you put a boattail there.

I am not sure understand: if the scheme is correct or not!
But I think, (now after higt RPM om my brain ) that, the the optimal external boattail shape depending from the shape of area of rear wheel.
So, if Iuse the rear side skirt, the ideal shape it is similar or equal to your, instead, if the sideskirt isnt' present, the boattail do not require one taper on the externa side, beacose the airflow from the side car is a lot turbolent.

Do you think about my consideration?

[fabrio.]

Originally Posted by Otto

The problem is to remove it, not to anchor it: That stuff sticks to everything it touches.

Probably best to use a separating barrier that the Great Stuff will not stick to, like Saran Wrap of plastic that will conform to the shape of the car, and make a base. Then, built up and sculpt the base into boat shape.

You could use some aluminum screen in the Great Stuff, to make an internal hard point for attaching to the car.

mmm...and, if, I make stamp matrix whith cardboard and I fill it whit the foam spay?.
After, I could apply it fiberglass ?
For anchor, I could make necessary hole in the rear bumper, wath you say?

[aerohead]

From other sites,its been reported that the WFS can show measurable results in the windtunnel,and this suggests that they will in a small way,show up at the gas pump.Certainly,any turbulence prevented at the front of the car,will permit a more beneficial flow at the rear.Your modifications look good,and I suspect the air likes them too! Nice work!

[MetroMPG]

Originally Posted by Otto

Probably best to use a separating barrier that the Great Stuff will not stick to, like Saran Wrap of plastic

Tin foil makes for a good "release agent" and is probably easier to apply than plastic wrap.

[fabrio.]

aerohead: whot is the WFS?

[fabrio.]

do you refer to mine devices?...the Windows Flow Stabilizer?
If yes, I am not notice about other realization similar at mine WFS, could you tel me link this sites please?