----- Original Message -----
Sent: Monday, February 09, 2009 6:50
PM
Subject: [FlyRotary] Re: My RV10
Cowl
No exit ducts. It just dumps into the cowl. I don't think
the ducts are in a boundary layer. They are partially submerged but
pretty much in straight in the air flow. Here's a pic of the
plug during construction that shows the ice cream scoop cut in.
Interesting Bobby,
Seems to be working. Is there another set of
ducts the turns the air the rest of the way round? Or does the air exit the
rads to flow into the cowl and then exit rearward like the opening in a
conventional air cooled engine? I can't really tell from the pictures, but I
wondered if you bothered with any kind of boundry layer control? Good
luck and I hope for your continued success.
Bill Jepson
-----Original
Message-----
From: Bobby J. Hughes <bhughes@qnsi.net>
To: Rotary
motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, 9 Feb
2009 3:46 pm
Subject: [FlyRotary] Re: My RV10 Cowl
Bill,
Here is the rest of the picture. The cowl is actually three pieces. The bottom
fairing slides into place to feed the radiator ducts. The air makes a
360. Not my first plan but it seems to be working. The ducts
are in high pressure at any attitude and it would appear they are
getting good air from the prop. With the cowl off and an OAT of 65 I had a hard
time warming up the oil. Stuffing carpet in ducts solved that problem.
Bobby
Looking good Bobby,
Interesting inlet solution. Any ducting or a
straight inlet to a plenum? Good numbers.
Bill Jepson
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