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Old 01-08-2010, 02:31 PM   #77 (permalink)
3-Wheeler
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Join Date: Dec 2008
Location: Southern WI
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AlienMobile - '00 Honda Insight
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Quote:
Originally Posted by 3lr View Post
coast down tests, with your engine disengaged, provide very little resistance to an errand swift "wiff" or wake
from a jetstream on an otherwise totally still day.
especially on an lightweight vehicle, esentially flushing
your efforts.
for all aero improvement testing of my coasting racers i have found an very steep spot in the forrest surrounded by
dense pines, thus shielded from all extracurricular ariflow.
i you have no shielding of any kind perform your tests
during complete windless nights in the early AM, but not too late as i have noticed slight wind suddenly arising around 4 am in various paces around the globe!

air is always "thicker" at night time making test conditions
much more discerning!
And that's why it's better to coast down test in the winter...

Makes it harder to swap parts however!!

Jim.
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