Quote:
Originally Posted by ennored
I vote to try 80 MPH. (Or something like that.)
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I agree it's good to test aero at higher speeds. Unfortunately, I'm already over the limit on my test route at 90 kph (56 mph ... limit is 50 mph / 80 kph). I could get away with ~65-70 mph on the freeway, but traffic is much busier, and it's not as flat.
Also, I like to test mods at the speeds I typically drive.
Quote:
Originally Posted by Piwoslaw
Wow! That's like almost nothing! Within testing noise  |
It's slightly better than that. The noise (standard deviation) in each set (4 runs, 2 each way) was just under 0.4 mpg. So a 1 mpg difference looks legit, unfortunately.
Quote:
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I assume this was only the small tail, that the Kamm was on in the no-tail run? This would show that the Kamm is "doing most of the work",
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I actually also compared Kamm alone (no tail) vs. bare car, and the Kammback appears to have made no difference. 49.2 mpg with it on, 49.2 mpg with it off, 8 runs total (each way).
I'm going to post the details & numbers in just a minute.