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Old 01-31-2005 | 02:17 PM
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Gravityisnotmyfriend
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From: Greenville, WI
Default Leaf blower conversion w/o converting?

I saw an ad for a gas leaf blower that claims it blows at 150mph. Would it work to just strap one of these to an R/C and make a ducted fan-ish plane? I realized that there would be alot of excess weight, but I was wondering if anyone had tried this. Does anyone know what 150mph equates to in lbs of thrust? If you had a gas engine spinning a 14X8 prop @ 8000RPM, that means that it would go ahead 8" per revolution assuming no slip. So, (8 inch/rev)(8000 rev/min)(60 min/hr)(1ft/12inch)(1mile/5280ft)= 60.61 MPH which is less than half of what the ad claims. My logic must be flawed here, or everyone would be strapping leaf blowers to their planes. Would the area of the prop disc vs the area of the blower tube make that much of a difference?