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Old 06-19-2011, 10:49 AM   #138 (permalink)
COcyclist
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Join Date: Dec 2007
Location: NW Colo
Posts: 738

TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 52.55 mpg (US)
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Quote:
Originally Posted by orbywan View Post
My RV boat tail is coming along pretty well. So much for building a quick prototype to see what kind of gains it achieves. This is such a big structure I decided to buy some steel and go for it, I don't know how else to do it. The three trim pieces for the rear cap were all damaged and cracked and they want about $350 for new trim so I figure if this works that money is well spent towards the modifications. The frame is about 80% done so far and weighs a little over 60 pounds. I’m impressed with how strong the structure is, even with no skin yet.

I'm going to cover it in coroplast to do some testing, if it proves to be sufficiently beneficial I'll probably recover it with aluminum. This summer heat is slowing things down a little but I can’t wait to test this out.
orbywan, This deserves it's own thread. Great to see some modding on a large vehicle and please post the results. I hope you were careful not to go too steep on your angles. Good for you for diving in on this project.
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Quote:
Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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