colin.scott.hudson(at)gma
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 Posted: Sat May 04, 2013 3:26 pm Post subject: JabiruEngine-List Digest: 2 Msgs - 05/03/13 |
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Thanks Barry that's too simple. It's about what I have now only I never thought of the PCV valve. I was a little nervous about using ram air as I didn't want to over-pressure the crankcase. I'll try it.
Colin
N424AL
Kolb Mark III X-tra
Belton TX
Retired Army Pilot
Sent from my iPhone
On May 4, 2013, at 2:01 AM, JabiruEngine-List Digest Server <jabiruengine-list(at)matronics.com> wrote:
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JabiruEngine-List Digest Archive
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Total Messages Posted Fri 05/03/13: 2
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Today's Message Index:
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1. 04:46 PM - Crankcase vent (Colin Hudson)
2. 06:41 PM - Re: Crankcase vent (FLYaDIVE)
________________________________ Message 1 _____________________________________
Time: 04:46:18 PM PST US
Subject: Crankcase vent
From: Colin Hudson <colin.scott.hudson(at)gmail.com>
> I'm running a jabiru 2200, pusher configuration, engine exposed in a Kolb Mark
3x-tra. The engine doesn't burn any oil but I get a lot of blow by on each
flight from the crankcase breather tube. I'm sure with the engine exposed the
airflow over the vent is causing a vacuum and sucks it out. The vent reservoir
doesn't trap the oil. Any one have a way to allow the crankcase to breath
with out loosing a lot of oil? Sure get tired of cleaning oil off the tail feathers
each time I fly
Colin Hudson
________________________________ Message 2 _____________________________________
Time: 06:41:16 PM PST US
Subject: Re: Crankcase vent
From: FLYaDIVE <flyadive(at)gmail.com>
Colin:
I have a few tricks you can try - They are dependent on how your breather
tube is configured and how the engine is mounted:
1. Coming off the engine use a flexible rubber hose and put a "pigtail"
in the run. A 360 Deg circle.
2. Again with the flexible hose install a PCV
(Positive Crankcase Ventilation) Valve as HIGH as possible in the tube
above the height of the engine and make sure the check valve points down in
the closed position.
3. If you have say a 5/8" hose for the breather tube - Reduce it near
the end tio half the size. You can use a step type fitting.
4. Face the Breather Hose INTO the oncoming wind.
5. And of course you can use any combination of this ideas.
*Barry*
On Fri, May 3, 2013 at 7:45 PM, Colin Hudson
<colin.scott.hudson(at)gmail.com>wrote:
> colin.scott.hudson(at)gmail.com>
>
>
>> I'm running a jabiru 2200, pusher configuration, engine exposed in a
> Kolb Mark 3x-tra. The engine doesn't burn any oil but I get a lot of blow
> by on each flight from the crankcase breather tube. I'm sure with the
> engine exposed the airflow over the vent is causing a vacuum and sucks it
> out. The vent reservoir doesn't trap the oil. Any one have a way to allow
> the crankcase to breath with out loosing a lot of oil? Sure get tired of
> cleaning oil off the tail feathers each time I fly
>
> Colin Hudson
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