REFLECTOR: Breather tube

[Lou Stedman]

Thanks Mike. I am interested how you have the tube secured.

From: Michael Watson 
Sent: Friday, March 02, 2012 1:59 PM
To: Velocity Aircraft Owners and Builders list 
Subject: Re: REFLECTOR: Breather tube

Hi Lou,

I could not find a picture of the installation in my picture file, sooooo,
the next time I have the lower cowl off, I'll take one and send it to you.




On Fri, Mar 2, 2012 at 1:34 PM, Lou Stedman <stedmanlou at roadrunner.com> wrote:

  Mike do you have any pictures of your installation?

  From: Michael Watson 
  Sent: Friday, March 02, 2012 1:15 PM
  To: Velocity Aircraft Owners and Builders list 
  Subject: Re: REFLECTOR: Breather tube

  Ruben,

  this is how your breather tube should be installed.
  Make sure you cut and notch the tube inside the cowl. This is standard practice
  in case the opening at the exit gets iced over. 


      I        I
      I        I
      I        I
      I        I 
      \        I           
        \      I Cut angle inside cowl 
      I        I      I firewall
  ---I        I-----I------------------  --->  to front of aircraft
      I        I   Bottom of fuselage 
      I        I 
       \       I 
         \     I  
           \   I
             \ I






  On Fri, Mar 2, 2012 at 11:55 AM, Ruben Creus <ruben at vainneg.com> wrote:

    I had to temporarily remove the breather tube the other day to work on some wiring stuff. When I place the tube back in place and looking at it,  I thought that as the tip of the breather tube that exits the cowling is cut in a 45 degree angle, then I assumed that if I place it facing the nose I guess it would have air pressure pushing into the tube. If I place it facing the tail, then the air around the tube it might create low pressure and therefore pushing the air out of the tube creating suction. If I place it facing the wing, the air would just travel passing the tube with no effect. 



    I guess all this rational also depends on the air pressure inside the breather tube coming from the engine, so I did several tests, facing the tube in this three positions and flying a bit. My tests concluded that when the tube is facing the tail It seems I have more oil coming from it as the cowling seems more oily , but is was hard to conclude as the oil leaving the tube could end up how knows where. And where the tube is facing can also impact where the oil will eventually go. Showing all my test were kind of inconclusive. 



    So, guess the main question is that if you know what is the proper positioning of the 45 degree opening, nose, side, or tail, or if it really matters?





    Ruben G. Creus

    Ë +1.571.215.0025

    * ruben at vainneg.com
















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  -- 
  Mike W.
  1997 Velocity Elite RG
  Franklin /IVO Electric CS
  Dual GRT EFIS HX Synthetic Vision

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-- 
Mike W.
1997 Velocity Elite RG
Franklin /IVO Electric CS
Dual GRT EFIS HX Synthetic Vision



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