Today's Message Index:
----------------------
1. 05:15 AM - Re: Sniffle valve (Gary Casey)
2. 05:29 AM - Re: Re: Sniffle valve (Kelly McMullen)
3. 08:23 AM - Re: Sniffle valve (Monty Barrett Sr)
4. 01:22 PM - IO-360 Engine, Instruments, Ignition (Doug Dodson)
5. 11:54 PM - Re: Sniffle valve (Fiveonepw@aol.com)
Message 1
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| Subject: | Re: Sniffle valve |
I assume most Lycoming installations (at least the 3 that I have
owned) just use a simple drain, so there is a "leak" the size of the
tube when the engine is running. The idle speed and mixture
adjustments compensate, so no one seems to worry. A sniffle valve
would presumably reduce that leak, but apparently isn't necessary.
Gary Casey
>
> I am installing a Lycoming sniffle valve (included in Vans FWF kit)
> to an
> Aerosport IO-360 and would like to confirm its inteded operation.
> I "think" it
>
> is basically a check valve that should open when manifold pressure
> is equal to
>
> atmospheric (engine not running) to drain any fuel pooled in the
> sump. Engine
>
> running, it should close when manifold pressure drops. The valve I
> have
> flows freely when blowing into the sump side, but still passes a
> bit of air when
>
> blown into from the tube side, which I surmise would constitute a
> small vacuum
>
> leak and possible leaner than normal operation.
>
> Is this normal?
>
> Thanks-
> Mark
Message 2
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| Subject: | Re: Sniffle valve |
The engines I'm familiar with all call for a sniffle valve, that looks
like a standard AN 90 degree fitting. I don't know how well it is
supposed to seal after fuel and gunk have drained through it for a few
years.
On 5/22/07, Gary Casey <glcasey@adelphia.net> wrote:
>
> I assume most Lycoming installations (at least the 3 that I have
> owned) just use a simple drain, so there is a "leak" the size of the
> tube when the engine is running. The idle speed and mixture
> adjustments compensate, so no one seems to worry. A sniffle valve
> would presumably reduce that leak, but apparently isn't necessary.
> Gary Casey
>
> >
> > I am installing a Lycoming sniffle valve (included in Vans FWF kit)
> > to an
> > Aerosport IO-360 and would like to confirm its inteded operation.
> > I "think" it
> >
> > is basically a check valve that should open when manifold pressure
> > is equal to
> >
> > atmospheric (engine not running) to drain any fuel pooled in the
> > sump. Engine
> >
> > running, it should close when manifold pressure drops. The valve I
> > have
> > flows freely when blowing into the sump side, but still passes a
> > bit of air when
> >
> > blown into from the tube side, which I surmise would constitute a
> > small vacuum
> >
> > leak and possible leaner than normal operation.
> >
> > Is this normal?
> >
> > Thanks-
> > Mark
>
>
Message 3
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If you have a small leak at the " sniffle " valve it will only effect
you at idle and can be compensated with idle mixture adjustment. At WOT
the engine doesn't care as long as the leak is small. A big hole is
another story.
Monty Barrett
BPE, Inc.
-----Original Message-----
From: owner-engines-list-server@matronics.com
[mailto:owner-engines-list-server@matronics.com] On Behalf Of
Fiveonepw@aol.com
Sent: Monday, May 21, 2007 4:56 PM
Subject: Engines-List: Sniffle valve
I am installing a Lycoming sniffle valve (included in Vans FWF kit) to
an Aerosport IO-360 and would like to confirm its inteded operation. I
"think" it is basically a check valve that should open when manifold
pressure is equal to atmospheric (engine not running) to drain any fuel
pooled in the sump. Engine running, it should close when manifold
pressure drops. The valve I have flows freely when blowing into the
sump side, but still passes a bit of air when blown into from the tube
side, which I surmise would constitute a small vacuum leak and possible
leaner than normal operation.
Is this normal?
Thanks-
Mark
________________________________
See what's free at AOL.com
<http://www.aol.com?ncid=AOLAOF00020000000503> .
Message 4
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| Subject: | IO-360 Engine, Instruments, Ignition |
My Glasair has reached a new stage of construction, I have dis-assembled it
for final work in the interior of the fuselage and painting.
I have taken so long to build this thing, I can now afford different choices
for certain components I could not afford when I started. What that means
to all of you is the opportunity to get some bargains on components I will
not use when I do the final assembly on my airplane. E-mail me at
douglas.dodson@pobox.com for more information or photos of any of the
equipment.
IO-360-B1E: assembled engine, overhauled several years ago but never run,
most but not all accessories included (most would suffice for core value)
Lycoming core value on this engine is $10,500. I'm asking $12,000.
Elector-Air electronic ignition system w/ hall effect pickup. Included is
the full system and instruction manual. Never used. $400 Buy the engine
and you can have this.
VM 1000 system for an IO-360. This is brand new, most of the components have
not been removed from the original packaging. A few of the senders were
installed but never used. It sells new for about $3000. I'm asking $1900.
Included is the DPU, display, all senders including fuel flow, wiring, and
the manual.
I also have the fuel level system which is a separate display capable of
indicating for 3 tanks, and one 8' probe. This can be yours for $350 (probe
retail new is $500 all by itself).
I also have an ACK A-30 altitude encoder and a Rapco vacuum pump cooling
kit. Buy something else and you can have these for a beer and the cost of
shipping.
Douglas L. Dodson, Jr.
Glasair II-S FT
Flight Test Engineer, CFI-A,G
Message 5
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| Subject: | Re: Sniffle valve |
In a message dated 5/22/2007 10:25:10 AM Central Daylight Time,
MONTY@bpaengines.com writes:
If you have a small leak at the =9C sniffle =9C valve it will on
ly effect you at
idle and can be compensated with idle mixture adjustment. At WOT the engine
doesn=99t care as long as the leak is small. A big hole is another st
ory.
>>>>
Thanks to all respondents- good discussion. Primary concern was a defective
part, but it don't sound like a biggie- I'm puttin' the sucker in since it's
paid for and shouldn't make the plane fall out of the sky! 8-)
Mark do not archive
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