[Land-speed] Sorta On Topic...Leaf Blower...

[neil at dbelltech.com]

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 at autox.team.net
[mailto:land-speed-bounces+neil=dbelltech.com at 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
>
>----- Original Message ----- 
>From: "drmayf" <drmayf at mayfco.com>
>To: "LSR" <land-speed at autox.team.net>
>Sent: Thursday, January 17, 2008 8:49 AM
>Subject: [Land-speed] Sorta On Topic...Leaf Blower...
>
>
>  
>
>>The chit chat about aero using leaf blowers etc has reminded me that I
>>need to get a leaf blower to do some testing with. Not aero but mass air
>>flow sensor testing. I want to stack up 2 vane air flow meters and one
>>old fors mass air flow meter and a throttle body in one long string and
>>then draw through them with a leaf blower or similar. More flow is
>>better so a big leaf blowere would work really well. What I am having
>>trouble with is getting ratings in cfm...every mfg has mph but since I
>>don't know the duct size cannot determine the cfm from that. How about
>>some of you hguys with leaf blowers, take a look at teh speed rating and
>>then measure the outlet size diameter and shoot me a note that way I can
>>determine the cfm and maybe start looking for a particular model. This
>>is all in support of adding a larger vane air flow meter to the
>>screaming 61 cubic inches of turbo terror that my wife will ultimately
>>drive on the salt. No rush, anythime this morning befpore 9 am pst will
>>do, lol...nah I'd be happy to get data from you at anytime.
>>
>>mayf