Civic VX Boattail

[gijoe985]

Live in Ellensburg, teach in Grandview.... about 75 miles away...

[2000neon]

Boat tail and rear wheel skirts and you can do that on one gallon of fuel . Good luck, you definitely have one of the best cars to start with.

[gijoe985]

Originally Posted by 2000neon

Boat tail and rear wheel skirts and you can do that on one gallon of fuel . Good luck, you definitely have one of the best cars to start with.

Thanks!!! We'll see about 75-80mpg on my work run. I have three mountain passes that always hurt my numbers. Though I get over 6-7 miles of engine off coasting a day...

[gijoe985]

Got 50mpg today on the way to work. That's closer to what I get in the Spring, so I think the HAI is helping.

I redid my boattail design. Look better?

[aerohead]

Originally Posted by gijoe985

I may take the plunge... I drive 150 miles a day...

How does this blueprint look? I assume good. Before I begin thinking about fabrication (I teach auto shop, so this will be a fun class project) I just want to make sure that my theory is good.

Here is 'Kamm's boat tail.You'll need to weigh out your departure angle so's not to rip her off on a driveway ramp.Just a comparison.

[UltArc]

Although the best gains are from the rear, I believe in starting from the front to back. The better the front is, the better the gains at the rear.

As Metro said, increasing frontal area is better than a dirty belly- but a clean belly is better than that bigger front end.

I just had a brain tsunami, and have to cut this post short- only posting a halfee because I want to subscribe and am interested in following your journey

[aerohead]

Originally Posted by UltArc

Although the best gains are from the rear, I believe in starting from the front to back. The better the front is, the better the gains at the rear.

As Metro said, increasing frontal area is better than a dirty belly- but a clean belly is better than that bigger front end.

I just had a brain tsunami, and have to cut this post short- only posting a halfee because I want to subscribe and am interested in following your journey

Here are some canopy images to look at.If you compare line 2 with line 3 you see no change in drag in spite of the 'more aerodynamic' nose of the line-3 canopy.Just something to think about.
As to line-1,construct it on paper or computer and see if you could live with it.
PS,it's a 'laminar' shape.something we don't get on real roads.

[gijoe985]

Right now I am trying ti determine what materials to use for the mock up. I dont have any large cardboard on hand. I could use 1/4 plywood. I could also buy foam. I thought fiberglass in the end would be pretty cool. We've got some lexan on hand for a rear window.

[redneck]

Originally Posted by gijoe985

Right now I am trying ti determine what materials to use for the mock up. I dont have any large cardboard on hand. I could use 1/4 plywood. I could also buy foam. I thought fiberglass in the end would be pretty cool. We've got some lexan on hand for a rear window.

http://ecomodder.com/forum/showthrea...yle-26022.html




>

[MetroMPG]

Originally Posted by gijoe985

I redid my boattail design. Look better?

I would say so! Phil's illustrations confirm it, but departure angle is a real world consideration, as he points out.