REFLECTOR: Molding a P-51 Scoop

[Scott Derrick]

This is a certified turbocharged engine. I'm using the plumbing that came
on the engine.  Oil goes from the bearing to a air/oil seperator, then is
plumbed into the oil pump housing which is designed to act as a scavenger
pump also.

Scott


> Scott-
> How are you getting the oil from your turbo back to the pan?
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Scott Derrick
> Sent: Tuesday, September 06, 2005 1:31 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Molding a P-51 Scoop
>
> I'm really paranoid about having enough cooling.  I have a separate
> under wing ram air scoop for induction air, top NACA's for cylinder,
> alternator, and possibly turbo bearing cooling, and I was going to use
> the P51 scoop for intercooler cooling.
>
> The turbo hangs down below the belly line so I'm either going to have a
> bulge or I can install a scoop/plenum at the firewall for the
> intercooler and that will also contain the turbo for a clean cowl line.
>
> I think I might as well do the scoop.  If I have to much cylinder
> cooling from the NACA's I can always put some kind of door in them and
> restrict the flow during winter and cruise.
>
> Scott
>
>
> Alex Balic wrote:
>
>>Hi Scott-
>>Actually, for my intercooler, I take the air from one of the top NACA
>>scoops- if you can send me your e-mail directly, I will send you a
>>picture of the rather strange duct I had to make for this- the
>>intercooler face is about 8X10 and sits close to the firewall, so it
> had
>>to do some really fast expanding, but it is probably about 5:1 I am
>>guessing- not too concerned, because cooling the intake is not as
>>important as cooling the glycol- will send along some belly scoop pics
>>when I can get them out of the camera......
>>
>>Alex
>>
>>-----Original Message-----
>>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>>Behalf Of Scott Derrick
>>Sent: Tuesday, September 06, 2005 11:29 AM
>>To: Velocity Aircraft Owners and Builders list
>>Subject: Re: REFLECTOR: Molding a P-51 Scoop
>>
>>Alex,
>>
>>I checked and you are correct,  3-1 or 4-1 are recommended.  I don't
>>know where I got a 2-1 ratio?
>>
>>4-1 would be a much better and smaller scoop.
>>
>>Back to the drawing board.
>>
>>Scott
>>
>>Alex Balic wrote:
>>
>>
>>
>>>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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