REFLECTOR: Breather tube

[Michael Watson]

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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