yup, screwed up. I had square inches and then divided that by cubic
inches instead of sq inches per sq ft
should have been 18920 (ft/min) * 2.41 (sq inches) / 144 (sq
inches/sq ft) only a factor of 12 off. Heck that was good enough for
the space station, lol...
so the real cfm is about 316 cfm much better. And I could use 2 of
them in parallel to get > than 500 cfm.
good catch...
mayf
neil@dbelltech.com wrote:
>Mayf;
>
>Weren't your units in feet one place and inches in another? Maybe I missed
>the ft/in conversion?
>
>Regards, Neil Tucson, AZ
>
>-----Original Message-----
>From: land-speed-bounces+neil=dbelltech.com@autox.team.net
>[mailto:land-speed-bounces+neil=dbelltech.com@autox.team.net] On Behalf Of
>drmayf
>Sent: Thursday, January 17, 2008 6:08 PM
>To: Ed Weldon
>Cc: LSR
>Subject: Re: [Land-speed] Sorta On Topic...Leaf Blower...
>
>Ed, as I mentioned before, thanks for th einfo. It looks like a leaf
>blower wont hack it...but lemme check the numbers here...
>
>215 mph = 215 * 88 /60 * 60 ft/min = 18.920 ft/min. If I multiply
>the cross section in sq ft that would give me cfm...
>
>18920 * 2.41 / 1728) = 26.38 cfm...
>
>bummer. Somehow or another I had my head up my anal orifice and was
>thinking it would be much larger than that. So now I gotta look for a
>bigger "sucker". Maybe that idea about vacuum cleaner motors wasn't
>such a bad idea after all! Or an old 471 rootes blower hooked to an
>electric motor... this is getting too complicated, lol..
>
>mayf
>Ed Weldon wrote:
>
>
>
>>Mayf--
>>Toro Super Blower model 51591 (2 speed) "215mph" on the label.
>>Outlet area 2.41 square inches measured as follows: Measures length and
>>width of approx. oval nozzle 1.11" x 2.68"
>>Flattened a lump of modeling clay after warming same in a woodworker's
>>
>>
>bench
>
>
>>vise to .34" thickness.
>>Pressed nozzle into clay to get crisp impression. Put clay on platen of
>>flatbed copier and printed b/w image. Verified image against two
>>measurements previously taken. Measured area of image with a K&E 4236
>>planimeter. Result read from the vernier with magnification.
>>Ed Weldon Jan. 17, 2008, 10:00 AM PST
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