REFLECTOR: Molding a P-51 Scoop

[Alex Balic]

My intercooler opening is about 1/4 the size of the intercooler face-
when you check the book- see  if it has design pressure at the airspeed
in our range- most automotive books do not.

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Monday, September 05, 2005 8:34 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Molding a P-51 Scoop

Jim,

The intercooler face is 6x22, I thought I read some formula that a 
1-to-2 expansion area in front of the intercooler was a good thing.

I will reread my turbo book and verify what I need.  I agree, it seems 
like a whole lot of area. I would think 1/4 of that would do.

Scott

Jim Sower wrote:

> Isn't 66 sqin nearly the size of the engine cooling inlet?  Sounds 
> like a lot.  I would have thought maybe 30% of that would do.  Anyway,

> Urethane foam is cheap and carves easiest, Styrofoam will melt away 
> with gas.  I use duct tape or plastic/shrink wrap as a release agent.
> I'd revisit my sizing formula ... Jim S.
>
> Scott Derrick wrote:
>
>> I need to make a P-51 style scoop for my intercooler.
>>
>> It needs to have a 3 inch x 22 inch opening.
>>
>> Roughly rectangular, this would be mounted on the belly right at the 
>> firewall.
>>
>> What would be the best way to go about this?   Carve one out of foam?
>>
>> Any ideas are appreciated.
>>
>> Scott
>>
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