Today's Message Index:
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1. 02:36 AM - Re: Shut 'em down ... start 'em up? (Howard Windham)
2. 08:13 AM - Re: Shut 'em down ... start 'em up? (Brock Lorber - VegasFC)
3. 09:25 AM - Pre-oiler pumps for unfeathering? (CloudCraft@aol.com)
Message 1
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| Subject: | Shut 'em down ... start 'em up? |
--> Commander-List message posted by: "Howard Windham" <bw_cycon@yahoo.com>
On my 560e I put the pre-oilers on the 480's from these guys several
years back. They work great.
-----Original Message-----
From: owner-commander-list-server@matronics.com
[mailto:owner-commander-list-server@matronics.com] On Behalf Of Tylor
Hall
Subject: RE: Commander-List: Shut 'em down ... start 'em up?
--> Commander-List message posted by: "Tylor Hall"
<tylor@winddancer.aero>
Oilmatic makes a preoiler system that you turn on manually prior to
start of
the engine.
At engine shut down, you would then turn on the system to keep oil
flowing
to things like turbos to cool them.
http://www.oilamatic.com/
I spoke with them to day and it would not be a big deal to add the Twin
Commander to his existing STC's.
Regards,
Tylor Hall
Wind Dancer Aviation Services, Inc.
2V1, Pagosa Springs, CO
970-731-2127
Subject: Re: Commander-List: Shut 'em down ... start 'em up?
--> Commander-List message posted by: CloudCraft@aol.com
In a message dated 10/28/03 13:44:56 Pacific Standard Time,
nico@cybersuperstore.com writes:
> About the pre-oilers: is that a continuous pressure pump or does it
empty
a
> reservoir once only into the oil lines?
Continuous, as far as I know.
Brock? Can you verify? If not, I'll contact the fellow who had them
installed.
Wing Commander Gordon
==
==
==
==
Message 2
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| Subject: | Re: Shut 'em down ... start 'em up? |
--> Commander-List message posted by: "Brock Lorber - VegasFC" <blorber@vegasfc.com>
As I understand it from the IA that cares for her, (I haven't pulled the
case apart to verify) it is a continuous pump to a spray bar high in the
case to lube the crank and cam shafts. It must also force oil through the
journals (at least to the tap-off of the pressure line) because it builds
pressure on the oil pressure guages and is placarded against use with the
engine running.
Brock Lorber
> --> Commander-List message posted by: CloudCraft@aol.com
>
> In a message dated 10/28/03 13:44:56 Pacific Standard Time,
> nico@cybersuperstore.com writes:
>
> > About the pre-oilers: is that a continuous pressure pump or does it
empty a
> > reservoir once only into the oil lines?
>
> Continuous, as far as I know.
>
> Brock? Can you verify? If not, I'll contact the fellow who had them
> installed.
>
> Wing Commander Gordon
>
>
>
>
>
>
>
Message 3
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| Subject: | Pre-oiler pumps for unfeathering? |
--> Commander-List message posted by: CloudCraft@aol.com
Did some asking and am forwarding this to the net.
Wing Commander Gordon
Keith:
This question has been raised many times and is a worthy one. However, I'm
sad to say that without additional control valves and lines, it is impossible to
direct the Preoiler pressure to the needed port on the prop governor. The
governor has a gear pump in it, and the pressure must be applied down stream from
those gears to apply pressure to the prop hub to un-feather. During normal
preoiling, those gears prevent oil flow through the governor just as the gears
in the main oil pump prevent oil from flowing back into the oil sump.
If the governor has a port that could be used (all governors do not), then a
line could be connected to it and fed through some type of diverter valve so
that full Preoiler pressure could be provided. Big problem with this
arrangement is that the engines pressure relief valve - set to around 65 to=2080
psi -
would be cut out of the system and pressure would then be limited by the
governor's relief valve which is set at a high pressure in the 250 to 350 psi range.
I
test each pump to 250 psi as part of=A0 assembly process. Even so, the volume
required to un-feather is small and limited so that if the preoiler were run
more than momentary, the pressure would leap to the high pressure and perhaps
create enough load to stall the pump and either blow its fuse or burn the motor.
I guess this is what you wanted to know.
Let us know how we can help.
George McCrillis, Pres., etc.
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