REFLECTOR: Molding a P-51 Scoop
michalk
michalk at awpi.com
Wed Sep 7 08:33:37 CDT 2005
I don't know about Scott, but I'm using a scavenge pump that came with
my turbo. It fits a standard accessory pad.
One of my concerns is the tubing feeding oil to the turbo. I'm using
steel braided lines now. I don't think that firesleeving them will
necessarily do any good, because I would expect these hoses to be
failure points, and firesleeve would just get filled with oil possibly
making the problem worse.
I've thought about using aluminum lines, but am not comfortable with the
possibility of work hardening and cracking.
What other options are there?
Alex Balic wrote:
> 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
>>>>>
>>>>>_______________________________________________
>>>>>To change your email address, visit
>>>>>http://www.tvbf.org/mailman/listinfo/reflector
>>>>>
>>>>>Visit the gallery! www.tvbf.org/gallery
>>>>>user:pw = tvbf:jamaicangoose
>>>>>Check new archives: www.tvbf.org/pipermail
>>>>>Check old archives:
>>>>>
>>>>>
>>>>>
>>>>>
>>>
>>>http://www.tvbf.org/archives/velocity/maillist.html
>>>
>>>
>>>
>>>
>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>_______________________________________________
>>>>To change your email address, visit
>>>>http://www.tvbf.org/mailman/listinfo/reflector
>>>>
>>>>Visit the gallery! www.tvbf.org/gallery
>>>>user:pw = tvbf:jamaicangoose
>>>>Check new archives: www.tvbf.org/pipermail
>>>>Check old archives:
>>>>
>>>>
>>>>
>>>>
>>>
>>>http://www.tvbf.org/archives/velocity/maillist.html
>>>
>>>
>>>
>>>
>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>_______________________________________________
>>>To change your email address, visit
>>>http://www.tvbf.org/mailman/listinfo/reflector
>>>
>>>Visit the gallery! www.tvbf.org/gallery
>>>user:pw = tvbf:jamaicangoose
>>>Check new archives: www.tvbf.org/pipermail
>>>Check old archives:
>
> http://www.tvbf.org/archives/velocity/maillist.html
>
>>>_______________________________________________
>>>To change your email address, visit
>>>
>>>
>>
>>http://www.tvbf.org/mailman/listinfo/reflector
>>
>>
>>
>>>Visit the gallery! www.tvbf.org/gallery
>>>user:pw = tvbf:jamaicangoose
>>>Check new archives: www.tvbf.org/pipermail
>>>Check old archives:
>
> http://www.tvbf.org/archives/velocity/maillist.html
>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>_______________________________________________
>>To change your email address, visit
>>http://www.tvbf.org/mailman/listinfo/reflector
>>
>>Visit the gallery! www.tvbf.org/gallery
>>user:pw = tvbf:jamaicangoose
>>Check new archives: www.tvbf.org/pipermail
>>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>>
>>_______________________________________________
>>To change your email address, visit
>
> http://www.tvbf.org/mailman/listinfo/reflector
>
>>Visit the gallery! www.tvbf.org/gallery
>>user:pw = tvbf:jamaicangoose
>>Check new archives: www.tvbf.org/pipermail
>>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>>
>>
>>
>>
>>
>
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>
> _______________________________________________
> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
More information about the Reflector
mailing list