Mailing List flyrotary@lancaironline.net Message #13911
From: Al Gietzen <ALVentures@cox.net>
Subject: Intake heat shield
Date: Wed, 15 Dec 2004 08:34:06 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

 

Thanks for the pictures, Al....it looks amazingly similar to the one I made two weeks ago. (I guess it's true that great minds think alike)?  (kidding).  I am glad to hear it works well for you.  I think I'll go ahead and hook it up and give it a try.  I can always reverse the procedure if I am not happy with it.  Thanks for the pic and input.  Paul Conner

 

BTW; Paul.  In my installation the TB is at a slight upward incline, so if there are any fuel droplets in the TB at shutdown, they would move toward the intake.  There is the question of why you would have any fuel in there to drip after shutdown.  My shutdown mode is always to turn off the fuel pump and/or injector power first, then the ECU and other power.  Might be a factor.

 

Also, on the heat baffle issue; I was amazed at how cool the baffle would stay even when the exhaust was glowing, as long as it had some air blowing on it.  During the dyno runs we kept a fan blowing up from underneath, and I could touch the baffle without getting burned.  Any drops of fuel on that surface would just evaporate and be gone.  I have a NACA scoop on the lower cowl and a diffuser to blow air up from underneath.

 

FWIW,

Al

----- Original Message -----

From: Al Gietzen

Sent: Wednesday, December 15, 2004 12:41 AM

Subject: [FlyRotary] Re: Atkins

 

Paul;

 

To comment on just one of your questions; I think it is advisable to have a heat barrier between the fuel rails and intake manifold, and the hot exhaust manifold.  I made one out of .020 SS.  Photo attached.  It has brackets to the lower intake manifold bolts, and some light weight SS brackets to the TB.

 

Al

 

 

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