REFLECTOR:Crankcase breather hose pop off

Ronnie Brown reflector@tvbf.org
Thu, 12 Jun 2003 19:52:38 -0400


My hole is larger.  I have a half inch ID aluminum tube with about 3/8 hole
drilled then bent down to a "whistle" opening.  That's what my Cessna has.
It works.


----- Original Message -----
From: "Scott Derrick" <scott@tnstaafl.net>
To: <reflector@tvbf.org>
Sent: Thursday, June 12, 2003 1:14 PM
Subject: Re: REFLECTOR:Crankcase breather hose pop off


> Paul,
>
> The hole is about an 1/8" in diameter.
> It is about an inch above the cowling inside the engine compartment.
> It is drilled slightly(apx 20 degrees) at an angle, pointing down as you
> look into the hole.
> The amount of oil vapor that comes out is negligible.
>
> Scott
>
> Paul Calhoun wrote:
> > Good point Scott. I have a way of straining gnats and swallowing camels.
> > Wisdom in the building process is choosing which battles you're going to
> > fight.
> >
> > Question: Where is the hole you drilled, how big was it and doesn't it
> > blow out oil vapor into your compartment?
> >
> > Paul
> >
> > -----Original Message-----
> > From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org] On
> > Behalf Of Scott Derrick
> > Sent: Wednesday, June 11, 2003 4:52 PM
> > To: reflector@tvbf.org
> > Subject: Re: REFLECTOR:Crankcase breather hose pop off
> >
> >
> > You guys are way to high tech for me.  I just drilled a simple circular
> > hole in mine!
> >
> > Scott
> >
> > Ronnie Brown wrote:
> >
> >>That's correct.  The whistle cut should be inside the engine
> >>compartment.  Mine is about 6 inches from the bottom of the cowling.
> >
> > I
> >
> >>don't think there would be an icing problem there.  And if there is,
> >
> > I'm
> >
> >>landing, right now!!!  cause it is WAY too cold outside. (;<)))
> >>
> >>The angle cut at the bottom of the cowl/fuselage (mine is 1/2"
> >>aluminum
> >>tube) sticks out about an inch or a bit more.
> >>
> >>
> >>----- Original Message -----
> >>From: Paul Calhoun <mailto:paul@med-amb.org>
> >>To: reflector@tvbf.org <mailto:reflector@tvbf.org>
> >>Sent: Wednesday, June 11, 2003 6:03 PM
> >>Subject: RE: REFLECTOR:Crankcase breather hose pop off
> >>
> >>Ronnie,
> >>Thanks for your response. <cut on the piece that sticks out the
> >>bottom>  - Bottom of the cowling? Shouldn't the whistle slot be near
> >>the opening of the crankcase so the potential ice blockage would be
> >
> > down
> >
> >>line?
> >>
> >>The angle cut is a good idea. Some have wrapped a spring around the
> >>middle of the slot also.
> >>Paul
> >>
> >>    -----Original Message-----
> >>    From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]
> >
> > On
> >
> >>    Behalf Of Ronnie Brown
> >>    Sent: Tuesday, June 10, 2003 7:00 PM
> >>    To: reflector@tvbf.org
> >>    Subject: Re: REFLECTOR:Crankcase breather hose pop off
> >>
> >>    I used the whistle slot and it works fine, IF you have a good
> >>    rearward cut on the piece that sticks out the bottom.  I tried
> >>    cutting it more in line with the fuselage bottom, and that caused
> >>    oil to blow onto the firewall through the whistle slot.  I recut
> >
> > it
> >
> >>    with more angle and it is working fine without getting oil on the
> >>    firewall.
> >>
> >>    Ronnie
> >>
> >>    ----- Original Message -----
> >>    From: Paul Calhoun <mailto:Paul@med-amb.org>
> >>    To: reflector@tvbf.org <mailto:reflector@tvbf.org>
> >>    Sent: Tuesday, June 10, 2003 8:07 PM
> >>    Subject: REFLECTOR:Crankcase breather hose pop off
> >>
> >>    Because of the possibility of the crankcase breather hose freezing
> >>    up, reflectorites have suggested slitting the top side of the hose
> >>    near the crankcase outlet for pressure relief in such an event.
> >
> > This
> >
> >>    avoids blowing out the crankcase seal with a blocked hose.
> >>
> >>    Has anyone considered/used a pop off valve in the hose instead of
> >
> > a
> >
> >>    slit? Seems like this would give a more reliable, controlled
> >
> > escape.
> >
> >>    If so,where would one get such a valve?
> >>
> >>    Paul Calhoun
> >>
> >>    Medical Ambassadors International
> >>    Transforming nations through the seamless combination of disease
> >>    prevention, evangelism, and community development.
> >>
> >>
> >
> >
> >
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