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From: "Paul" <sqpilot@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-742237@logan.com>
Subject: Re: [FlyRotary] Re: I found the power
Date: Wed, 16 Feb 2005 21:41:45 -0600
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Hi, Bernie...My Atkins short intake manifold would need between 10 and 12 
inches of hose to go from where I am considering installing the NACA ducts 
to the intakes of the throttlebody. The hoses would come straight away from 
the engine for maybe 3 inches, then straight forward to the NACA ducts. 
They would be installed under the cowling extension, which is basically just 
an extension of the wing, so it should be a high pressure area.  The large 
NACA duct feeding my radiator and oil cooler is located about 3 feet in 
front of this proposed location, but centered on the fuselage. (versus under 
one wing where I propose putting these new ducts).
      Good luck with the DAR inspection on Tuesday.  Paul Conner

----- Original Message ----- 
From: <jbker@juno.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, February 16, 2005 8:14 PM
Subject: [FlyRotary] Re: I found the power


>
> Paul C wrote:
>
> I was thinking of installing two small NACA ducts on the bottom of my 
> cowling with two hoses coming up to feed air to my TWM throttlebody.  The 
> NACA ducts I purchased from Van's RV (made for cowling ventilation) 
> already have a male outlet already molded in the assembly, so you just 
> slide a hose over it and secure with a clamp
>
> ---------------------------------------------
>
> Paul, you will have to make sure the NACA ducts are mounted on a pressure 
> surface and not a suction surface or you may be very disappointed in their 
> recovery. How far do you have to route the air to the T/B plenum. Tracy 
> picked up a lot of heat when he used SCAT tube for intake ducts and lost 
> power. He was not sure whether it was pressure loss of heat rise causing 
> the problem. What do you say Tracy?
>
> I would be very tempted to copy Tracy's periscope and put hard smooth pipe 
> to the plenum to extract all the power possible.
>
> Bernie, DAR coming next Tuesday, still waiting my new injector
>
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>
>
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