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Well, Ernest, it looks like the calculations were in the ball park regarding power required - but, then you already had that info {:>)
Ed
I believe this is the page that first sent me down this road:
http://www.lawncare-business.com/leaf%20blower%20comparisons.htm
The Husqvarna 155BT. A backpack blower that uses a 3.0Hp engine to deliver 378CFM at 161Mph. Their 165BT takes 4.2Hp to giver 452CFM at 168Mph.
MacKissic uses a 6.5Hp engine on their LB6 push blower to deliver 1800CFM at 175Mph. 10Hp will get you 2000CFM at 200Mph with their LB101CEZ.
Shindaiwa advertises that the 3.9Hp in their EB630 will deliver 613CFM at 201Mph, and Tanaka claims 500CFM at 200Mph from their 2.5Hp TBL-4600.
All the airflows are with the tube attached, but they are also marketing numbers, so keep the salt shaker handy. In fact, given Ed's math, I would say that Tanaka's claims are miraculous. Lynn gave me an idea for a test, though. I'll borrow Mark's digital pressure meter and see how much static pressure my electric blower will make. Possibly useless / possibly interesting data point.
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