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Old 06-01-2008, 11:00 PM   #39 (permalink)
Xringer
Old Retired R&D Dude
 
Join Date: May 2008
Location: Woburn Mass USA
Posts: 572

Little Red - '012 Prius c 2 Two
90 day: 26.38 mpg (US)

Transporter - '09 Escape XLS
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Quote:
Originally Posted by Chris D. View Post
according to some BSF racers the moons dont
get viable for areo till right aroun 120+mph..

read that on some site..

I'll bet if you drove 25 mph in your Tacoma and measured the MPG and then
bolted 4'x8' sheet of plywood vertically on your tailgate, you would see a big
drop in your 25 mph FE.

I believe that cd is important at low speeds too. (Just ask anyone who races bicycles).
If the moons help the cd at 120+mph and didn't help some at 55 mph, I would be very surprised.
It's not like they are active device like a spoiler or VG, to my eye, they are pretty passive.
Kinda like rolling up your windows when you drive over 30.. It helps.
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Cheers,
Rich
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