REFLECTOR: Roof NACA's

[Pat Shea]

Hi Rene,

I directed cooling air to my mags and the mechanical
fuel pump. No great reasoning other than the spam cans
I owned had blast tubes to these items. My alternator
is on the prop side of the engine so it's in the path
of the exiting air - it sounds like yours is on the
accessory case side. My electric pump is on the cabin
side of the firewall.  Is that 174KIAS?   

Pat 

--- Rene Dugas <dugasd at bellsouth.net> wrote:
> John,
> Probably not.  I'm blowing cool air on my electric
> fuel pump, gascolator
> from the right NACA 1.5" SCAT.  I have never
> measured this area for temp
> but it made me feel better.  I also take cool air
> off the rear plenum to
> my alternator housing and blow air on my vacuum pump
> between the
> runners.  My engine still cools great.  I think my
> larger NACA's work
> great.  23x23 cruise at 7500 ft is usually about 174
> knots at 13.1 gal,
> CHT 210 EGT hottest 1450 degrees ROP (runs too rough
> LOP.  Performed
> GAMI test and mine are within their acceptable
> range)  
> Rene'
> 
> -----Original Message-----
> From: reflector-bounces at tvbf.org
> [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Jack Sheehan
> Sent: Friday, May 06, 2005 12:01 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: RE: REFLECTOR: Roof NACA's
> 
> Rene
> I am flying the same engine 260hp. i have not
> considered any cooling 
> for the electric fuel pump. Mine is located at the
> bottom of the 
> firewall and as far as I know heat has not been a
> problem am I 
> missing something
> 
> -- 
> Jack Sheehan

> 


		
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