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Old 06-18-2017, 12:51 PM   #40 (permalink)
Varn
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Join Date: Jul 2010
Location: North Eastern Missouri
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OD - '05 Ford Econoline
90 day: 18.64 mpg (US)

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That is 130 mph on my econoline
If the numbers are true. which they are probably not. You have forward speed pressurizing the front of the blades.

I bet the fan losses at 60 mph (2000-2500 rpm) are about 1/8th that.

I fly electric RC planes and use a watt meter to measure the power input into the electric motor. The power used is not linear for speed.

Quote:
Originally Posted by Merlyn2220 View Post
.....

Clutch-style fan 7lbft of torque and 14hp @ 5500rpm!!!! (This is what's on my van)
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