Today's Message Index:
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1. 05:41 AM - LOM shut down (Robert Feldtman)
2. 06:24 AM - Re: LOM shut down (Stephen Beaver)
3. 09:19 AM - Re: LOM shut down (jeayers1@aol.com)
Message 1
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I follow "the book" printed by LOM and shut down my LOM on the glastar with
the ignition. I always worry about a P lead problem and stand clear of the
prop when turning it through... I have shut down by cutting gas valve OFF
and letting engine die of fuel starvation. I note it is a little hard to
start later cause the fuel pump has no gasoline in it. this was posted on
the cozy list below.... how do others shut down their LOM?
bobf
Are you trying to get someone killed? You should NEVER shut down the engine
by killing the ignition. All you need is for a P-lead to break and you've
got a hot engine ready to fire up as soon as someone moves the prop. And
P-leads break from something as simple as a bird scouting around for a new
nesting place.
Folks - if I'm out of line, just let me know and I'll graciously back off,
but this sounds like a tragedy waiting to happen.
Phil Kriley
Cozy Mk IV Plans 1460
Message 2
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Subject: | Re: LOM shut down |
Oh please.
Rule number one: Follow the manufacturers instructions. The LOM family of
engines, and the ubiquitous Russian radials M14, ASH11 etc are all
certified engines throughout most of the world, which means that the engines
and the operating handbooks have been certified as being suitable and safe.
They all of them have automatic mixture controls and are all shut down with
the mag switch.
They also all of them use some form of electrical spark enhancement/timing
system (variations on the shower of sparks) to help them start, and have
magnetos that are reluctant to make enough spark when it is not being
employed.
It IS possible to start and engine without these, and it has happened, but
anyone who has tried to start an LOM or M14 with the buzzer out of
commission will know that it is a lot harder to do that on an engine with
impulse mags.
The fact that the engine stops when the mags are turned off indicates that
the P leads are functional. The chance of them failing after that AND of
someone swinging the prop AND of the engine deciding that despite having no
ignition retard or shower of sparks it WILL start is IMHO, minimal.
Yes you could claim that ANY risk is unacceptable in aviation, but the only
way to embrace that philosophy is to lock the hangar and throw away the key.
It is for each of us to decide what the risk threshold is and act
accordingly. Let's not get our panties in a knot because someone else's
threshold is different to our own.
Steve
On 4/3/09 8:41 AM, "Robert Feldtman" <bobf@feldtman.com> wrote:
> I follow "the book" printed by LOM and shut down my LOM on the glastar with
> the ignition. I always worry about a P lead problem and stand clear of the
> prop when turning it through... I have shut down by cutting gas valve OFF and
> letting engine die of fuel starvation. I note it is a little hard to start
> later cause the fuel pump has no gasoline in it. this was posted on the cozy
> list below.... how do others shut down their LOM?
>
> bobf
>
>
> Are you trying to get someone killed? You should NEVER shut down the engine
> by killing the ignition. All you need is for a P-lead to break and you've got
> a hot engine ready to fire up as soon as someone moves the prop. And P-leads
> break from something as simple as a bird scouting around for a new nesting
> place.
>
> Folks - if I'm out of line, just let me know and I'll graciously back off, but
> this sounds like a tragedy waiting to happen.
>
> Phil Kriley
> Cozy Mk IV Plans 1460
>
>
>
>
>
Message 3
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Subject: | Re: LOM shut down |
The LOM book says: shut down by switching off the ignition.
There is no mixture cut off in the LOM engine controls.? In fact, some LOM models
don't have any mixture control in the cockpit.
I have an electric pump between the fuel selector and the mechanical engine pump.?
The only thing it is good for is to pressurize the fuel system before the
engine start,? Kind of a bandaid.
The primer pump system?is still required.
I hope this helps.
Jim Ayers
RV-3 LOM M332A modified with automatic mixture control unit.
-----Original Message-----
From: Robert Feldtman <bobf@feldtman.com>
Sent: Fri, 3 Apr 2009 5:41 am
Subject: Lom-List: LOM shut down
I follow "the book" printed by LOM and shut down my LOM on the glastar with the
ignition. I always worry about a P lead problem and stand clear of the prop when
turning it through... I have shut down by cutting gas valve OFF and letting
engine die of fuel starvation. I note it is a little hard to start later cause
the fuel pump has no gasoline in it. this was posted on the cozy list below....
how do others shut down their LOM?
bobf
Are you trying to get someone killed?? You should NEVER shut down the engine by
killing the ignition.? All you need is for a P-lead to break and you've got a
hot engine ready to fire up as soon as someone moves the prop.? And P-leads break
from something as simple as a bird scouting around for a new nesting place.
Folks - if I'm out of line, just let me know and I'll graciously back off, but
this sounds like a tragedy waiting to happen.
Phil Kriley
Cozy Mk IV Plans 1460
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