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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1209264@logan.com>
Subject: Re: [FlyRotary] Time marches on...parts get made
Date: Tue, 27 Jun 2006 21:59:12 -0400
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Looks like K&W to me.  A much closer representation than my very truncated 
ducts - so should cool even better.

I believe your measured results reflects the known fact that you can not ( 
in practice)  get the theoretical "even" distribution of pressure across 
your core.  There is always going better pressure recovery in the center 
where the air velocity normally stays the highest.  But, the Streamline duct 
gets you about as close as a practical approach can and I again think that 
is reflected in your reading of 0.33 across most of the core.

Good work, Ernest!  Looking forward to the results.

Me - decided to ditch my door design when I found out the cost of shipping 
the metal material would cost as much as the material itself.  So am now 
doing it in wood that is available at the local stores and it appears that 
may actually work out to be less work {:>) not to mention costing less. 
Iteration 24 }:<(

Ed

Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
----- Original Message ----- 
From: "Ernest Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, June 27, 2006 9:37 PM
Subject: [FlyRotary] Time marches on...parts get made


> There hasn't been many building reports lately.  I think everyone is
> flying except me.  Anyway, here is some progress I'm making.
>
> The oil cooler inlet duct is made as close to what K&W prescribes as I
> could get it.  I tested it today with a borrowed static pressure air
> meter and a leaf blower.  I couldn't get a steady reading simply holding
> the probe out in front of the cooler, so I drilled a hole in a spray can
> cap and poked the probe through  it.  This captured the static pressure
> from a representative area and kept the probe tip at a given distance.
> The very tip of the cooler measured around 0.39inH20 and the end closest
> to the tight curve was only 0.25 or so.  But that was only for an inch
> or two.  The center read a fairly steady 0.33 across the length, varying
> ą.02.  I think I'm going to put this one in the plane.
>
> The water cooler is next.  The white tower is the mold I've been making
> for the inlet duct.  I laid out the K&W coordinates, and cut them out of
> doorskin plywood.  Then I slotted them to slip together.  Hot glued a
> cap on each end then filled the interior with foam.  Now I'm covering it
> with lightweight spackling to set the final dimensions.  I should be
> ready to do the lay up as soon as it cools off.
>
> The final picture is the radiator I'll be using.  12.5x8.5x4.25.  A cap
> will cover the factory inlets, and I'll have to mount nipples on both
> sides.  There was a baffle on the inlet side that I had to drill
> through, but other than that this should be an excellent radiator for
> the Delta.  The flow was down the front right, up the back right, over
> and then down the left back, then up the left front.  After drilling the
> baffle and adding my own connectors, the flow will be down the front and
> up the back.  I was able to slide a piece of clothes hanger that measure
> .090 into the passage through the hole I drilled.  There are 23 sections
> with 5 passages in each, for a total area of at least 0.73in2.  My plan
> is for 3/4" hose, which only has an area of .44in2 at best.  Flow
> through the radiator should not be an issue.  An important point for an
> EWP installation.
>
> -- 
> 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)."
>
>


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