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Hi Dave,
I tried several methods of saving the molds - none of which worked for me. So I end up just ripping out the foam molds - I first cover them with duct tape so the fiberglass does not actually stick to the foam, but the contours did not permit them to slip out.
Ed
----- Original Message ----- From: "david mccandless" <daval@iprimus.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, February 27, 2007 11:15 PM
Subject: [FlyRotary] Re: cowl openings for water radiators
Hi Ed,
did you slit the cowls on the mould to remove them? If not, how did you
get the cured cowls off the mould?
BR, Dave McC
On 27, Feb , at 5:39 AM, Ed Anderson wrote:
John, don't know if these photos will help. But, like you I only have between 3 and 6" of duct distance on the radiators. You should do Ok with 20 sq inch on each opening with a good diffuser/duct. Attached are some photos of my current ducts. The openings are 18 sq inches each. I have had one opening down to as little as 10 square inches - but that was a bit marginal - so opened it back up. I have a generous exit area for the hot air including a larger 4" x 12" bottom opening as well as louvers on each side of the cowl. So you mileage could vary - but Tracy has essentially the same size opening as well as several others.
Ed\
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