REFLECTOR: Crankcase Breather

[Scott Baker]

Bruce,
Pls keep in mind the angle of the crankcase vent tube into the exhaust.  The orientation of the "Y" could create a high or low pressure situation - acting as an extractor - or blocker of the crankcase ventilation.
SB

  ----- Original Message ----- 
  From: Bruce Topp 
  To: 'Velocity Aircraft Owners and Builders list' 
  Sent: Wednesday, December 12, 2007 6:10 PM
  Subject: REFLECTOR: Crankcase Breather


  I was thinking about ideas for the crankcase breather that would not get oil on the cowl and would not freeze over but did not use a air-oil separator (not a fan of those things).  I have seen airplanes that had a tube welded to the exhaust and the breather hose hooked up to that.  The breather exits inside the exhaust pipe.  The Piper Malibu I believe does this.

   

  I was thinking about drilling a hole in the exhaust approximately 2 inches up the exhaust from the inside of the cowl. 1/2 inch hole to match the breather tube I currently have exiting the bottom the of aircraft. Then weld a stainless tube to this hole and connect the breather tube to it.  I attached a crude picture of what I am attempting to explain.

   

  Can anybody think of an idea of why this might not be a good idea?  It seems like the perfect solution to keep oil off the cowl and would never freeze. 

   

  Bruce Topp

  XL-FG

   



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