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Duct reducer

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naumuk(at)windstream.net
Guest

Posted: Tue Sep 08, 2009 2:34 pm Post subject: Duct reducer

All-

     NACA air inlet scoop is 2" OD,  eyeball vent is 1-1/2". Any leads for a reducer other than the aviation  department at Home Depot?

 Bill Naumuk

Townville, Pa.

HDS N601MG/Corvair  95%

   [quote][b]

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tigerrick(at)mindspring.c
Guest

Posted: Tue Sep 08, 2009 2:53 pm Post subject: Duct reducer

Hi, Bill.



The best solution I've found is to stick an AveoAir ball vent directly in the NACA duct outlet.  The 1.75" OD (also available in 1.5 and 2.0) nests quite nicely, and only needs a bead of RTV or a layer of  gaffer's tape to be snug and airtight.



Or, you can get the vent with the 2.0" sleeve, and some SCAT, and be done with it!



Rick Lindstrom

N42KP



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jaybannist(at)cs.com
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Posted: Tue Sep 08, 2009 4:53 pm Post subject: Duct reducer

Bill,

 

 No need for duct at all.  Just fab a few pieces and fasten the eyeball directly to the NACA outlet.  I think I used .062" for the face bracket and .025" for the transition piece.

 

 Jay Bannister

 

   

 

 

                All-

       NACA air inlet scoop is 2" OD,  eyeball vent is 1-1/2". Any leads for a reducer other than the aviation  department at Home Depot?

   Bill Naumuk

 Townville, Pa.

 HDS N601MG/Corvair  95%

     	  Quote:

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naumuk(at)windstream.net
Guest

Posted: Wed Sep 09, 2009 7:19 am Post subject: Duct reducer

Jay,Rick and Gerry-

     I installed my eyeball vents in  my panel so at this point, I can't direct couple the vents and NACA scoop. Also,  I mounted the NACA vents higher up, in the space between the upper longeron  and upper L angle brace. My reasoning was to (1) keep the length of vent tubing  to a minimum, (2) provide easy access when the top front skin was removed, and  (3) leave as little as possible hanging in the "Foot tunnel" to be kicked off by  an excited passenger. (Or pilot, for that matter)!

     With only 1/4" difference  between the NACA scoop and eyeball vent ODs to compensate for, I can either  remove some of the wire as suggested by Gerry or build up the OD of the eyeball  vent  using 1/16" rubber or foam. I'll make up my mind after the vent  tubing comes in from ACS. Thanks for your input.

                                                                                               Bill

      

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