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Ben,
It papers to me it's not so much what Tracy used buy
why he used it He has stated a couple of times, it was to tighten the back edge,
to restrict flow/ create more pressure, in the back of the duct to allow air to
flow more evenly through the rest of the Radiator. Although the material is
porous, I doubt very much if the air there( behind) is doing anything other than
creating pressure with perhaps some measure of evening out the overall
pressure.
Although Tracy used the bell shaped calculations and shape
majorly flattened out, it more resembles a wedge shaped duct to me, especially
with that later modification. Or we might call it a heavily flattened
bell shaped/ wedge back, hybrid duct.
George ( down under)
I
should have googled it first to provide a link. Soory guys.
http://www.tamko.com/ProductDisplayPage/tabid/53/ControlType/productDisplay/itemid/172/Default.aspx
Ben Haas
www.haaspowerair.com
To: flyrotary@lancaironline.net
From:
stol83001@live.com
Date: Mon, 1 Mar
2010 13:04:31 -0700
Subject: [FlyRotary] Re: Ridge vent material
The product Tracy is talking about is used in venting ridges.. it is called
Roll venting and comes in 40 foot rolls.
Ben
Haas
www.haaspowerair.com
To: flyrotary@lancaironline.net
Date: Mon, 1 Mar 2010 06:33:11
-0800
From: tracy@rotaryaviation.com
Subject: [FlyRotary] Re: Ridge vent
material
Hi Scott,
I replied to Kevin's comment on the ridge vent
material. It is very different from what you or Kevin are talking
about. See comments on reply to Kevin.
Tracy
On Sun, Feb 28, 2010 at 7:43 PM, <shipchief@aol.com> wrote:
Just quiet I guess.
For filler, I can offer that I've been in the shop working on my oil
cooler diffuser, sanding, smoothing in microlight, sanding,
painting. You all know the drill. It's hard to spread filler smoothly on the
inside of the duct where there isn't really any room for my hand, let alone
a spreader, or later a sanding block!
I've had good test runs since I bit the bullet and committed my time to
making quality scoop and diffuser assemblies. I just hope they work as well
when I continue to test @ higher power setting, and eventually fly it!
Tracy; when you refered to 'roof ridge material' as applied to the
inside of the cooler diffuser? did you mean the aluminum sheet with
small louvers? When I blow sanding dust out thru the cooler and duct in
assembly, using compressed air, most of the dust seems to pass out the aft
end of the cooler. I know microlite filler dust is heavier than air, but I
think it would be a fair representation of airflow when propelled with
the air nozzle. So I'm taking what I understand you to have said, and
may try to slow down the air at the back so the air flow will be more evenly
distributed thru the oil cooler.
I made a more pronounced ramp in the radiator duct after reading about
it in this forum, but I had already made the oil cooler diffuser. I might
yet carve out the back and build in that ramp!! but for now I would like to
know what that material is???
Scott E
-----Original
Message----- From: Thomas Mann < tmann@n200lz.com> To: Rotary motors
in aircraft < flyrotary@lancaironline.net> Sent:
Sun, Feb 21, 2010 4:03 pm Subject: [FlyRotary] Re: Test; no connectivity
for two days
One
word: Olympics
When
I go to the newsgroup list it hasn't updated in two days now; so don't know
if the server died or if the list is just really quiet...
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