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Old 07-15-2011, 08:06 PM   #22 (permalink)
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Originally Posted by JasonG View Post
Awesome !
Never thought of fairing my AC units. Cool.

The belly pan on the fiver netted around 1MPG for me. (That's nearly 3%)
The biggest benefit is (so it seems) is less sway in cross winds. I'm guessing from the wind pushing on the I beams.

I have to figure a way to make a Kamm clear the ramp door though..........

Can't wait to see V2 !!
I should have tested it before and after with the A/C fairing but according to the tell tails the air is flowing perfectly over the rear upper section, in spite of the steep angle. I think the A/C fairing is mostly responsible for that.

If you can figure out a way to Kamm the back, I'd love to see the results mileage-wise. I've never seen it done on a 5th wheel before. Never saw it done on an RV before either. To be honest I didn't think it would make such a big difference, but I kept looking at the huge abrupt drop off (for the air) area at the back and figured if it worked for NASA (referring to the Dryden AFB tests), I'll give it a shot. Completing the belly pan is next.
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