RE: Need Advice from BMW GURUS

["Gilbert, Clark" <Clark_Gilbert@xxxxxxx>]

John - 

You are right about the power thing. 300 cfm, at 2 psig, will take about
3 hp of fan. That would be a big model airplane.

Clark  

> Date: Wed, 23 Sep 1998 21:47:44 -0700 (PDT)
> From: bolhuijo@domain.elided
> Subject: Re: Need Advice from BMW GURUS
> 
> On Wed, 23 Sep 1998, Franklin Joseph wrote:
> 
> > We are either gonna use my car (E30 M3) or his car (civic vtec).
> > We are gonna use a 3" ducted blade fan with a high output motor. the
> fan and 
> > the motor is off a model plane. we are planning to put is behind the
> air flow 
> > meter.
> > We estimated that the fan will produce about 2-3 pounds of boost. 
> > I would like to know if this will work. 
> 
> by my calcs, a 2.5l motor @6000RPM sucks up 125l/s of air, which is
> 265cfm.  If you want to raise the pressure by 1/7atm (2psi), that ups
> the airflow to 300cfm.  Can your high output fan motor pump 300cfm at
> 2psi?  That's a lot of air.  Seems to me like you'd need more power
> than a model plane could provide.  Try a gasoline powered leaf blower!
> (I'm just dying to know if that'll work)
> 
> (You turbo guys feel free to tear apart my math - I'd like to learn a
> few things too)
> 
> - --
>   John Bolhuis    | These are no ordinary monkeys --
>  bolhuijo         | these are mean, spiteful, butt-biting
>   @domain.elided   | monkeys with an obvious mission: conquest.
>                                         -tabloid.net
> 

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