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From: "rijakits" <rijakits@cwpanama.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1032220@logan.com>
Subject: Re: [FlyRotary] Re: finding a radiator
Date: Mon, 13 Mar 2006 20:43:19 -0500
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If I got the idea right, to use the Streamline you would want to sketch the
"perfect" streamline for your radiator and then measure FROM the radiator
towards the intake - whatever length you can do, and cut it there.
That will be your intake area.....

 Wedge should be simple: Whatever your opening is - constant cross-area to
the radiator - as big a radius at the bottom near end as you can justify -
same point top surface, start a tapper to the end of the radiator to end
about 1/2" above the far end and radius it down.

Which one is better? No idea!
Generally I would guess streamline, but in your case it will not be perfect,
so you might want to do some mockup from plywood/cardboard/etc. and try some
watermanometer tests/kitchenscale on the rooftop on top of your car -
tests.....

Thomas J.

PS: PL over at the "other" site was lofting both systems together, looks
good but results are anyones guess....

----- Original Message ----- 
From: "the mallorys" <candtmallory@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, March 13, 2006 10:25 AM
Subject: [FlyRotary] Re: finding a radiator


> Dennis,
>
> You seem to be at the same point in installation as I.  I'm putting the
> Renesis in an RV-8 using the James cowl.  I'm trying to fit the radiator
> verticaly under the engine mount.  That gives me space of about 8 1/2 by
19
> 1/2.  Make the radiator 3.75 to 4 inches thick, and I should have enough
> cooling.  Since I don't have about 50 inches in front of the radiator for
> the perfect streamlined diffuser, the question for me is which will be
less
> drag, a shorter (about 20 inches) streamline, or tipping the radiator at
an
> angle and using a wedge shape diffuser?  In any case, I plan on having an
> exit duct also with a controllable exit.
>
> Does anyone know the answer?
>
> Chris
> ----- Original Message ----- 
> From: "Ernest Christley" <echristley@nc.rr.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Sunday, March 12, 2006 10:37 PM
> Subject: [FlyRotary] Re: finding a radiator
>
>
> > Dennis Haverlah wrote:
> >
> >> My question is - will the air make the 75 degree turn and flow through
> >> the fins?  If not - would turning vanes below the radiator make this
> >> configuration possible?
> >
> > Dennis, a section in K&W book discusses this very issue.  The short
answer
> > is "Yes".  The long answer is that you have to be very careful how you
> > design the duct face in front of the radiator.  If you have their book,
> > it's figure 12-12 on page 277.
> >
> > -- 
> > This is by far the hardest lesson about freedom. It goes against
> > instinct, and morality, to just sit back and watch people make
> > mistakes. We want to help them, which means control them and their
> > decisions, but in doing so we actually hurt them (and ourselves)."
> >
> >
> > --
> > Homepage:  http://www.flyrotary.com/
> > Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/