[EFI] Re: Building a Flow bench

[Stephen Andersen]

Greg,

EIther you messed up a work in your writing, or we will
have to agree to disagree here.

I have a bunch of fan/blower catalogs in front of me for 
a project I am working on.  I will agree that getting more
than 5-6" H2O from an AXIAL fan, is not very easy.  

However I have beaucoup fan catalogs that indicate that getting
anywhere from 20" up to even 100+" H2O from a CENTRIFUGAL
fan is not a stretch, in flow ranges from 200-100000+ CFM.

I am not saying anything about efficiency here, just simply
the ability to create a given desired static pressure...

Another very efficient option to consider in the pressure range
you are looking at for a flow bench might be a mixed flow fan,
which combines some of the features of axial and centrifugal
fans.

Also, a used roots type blower would work very well (although
perhaps not very efficiently).  DEpending on flow rate required,
you can probably pick one up for a few $100, and as long as 
you kept the pressure ratio low, would be able to drive it 
with a reasonable (10-15hp) motor for "small" engine type of 
flow rates...

Am I smoking crack here, or did you miss something?

Steve

> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Greg Hermann
> Sent: Tuesday, February 05, 2002 11:03 AM
> To: diy_efi at diy-efi.org
> Subject: Re: [EFI] Re: Building a Flow bench
> 
>
> Most centrifigal fans can only make about 5 or 6 in H2O 
> static pressure
> before you "stall" the fan blades !! As I said before, TRY 
> looking at some
> commercial fan curves before you run your mouth !!!
> 
> Greg
> 

----- End of forwarded message from owner-diy_efi at diy-efi.org -----
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