Today's Message Index:
----------------------
1. 06:32 AM - Re: CJ6 Housai (airmanv2)
2. 07:41 AM - Re: Throttle Open on Shutdown ? (Dr. Herbert Coussons)
3. 02:48 PM - Re: Throttle Open on Shutdown ? (Roger Kemp)
4. 03:21 PM - Re: Throttle Open on Shutdown ? (Bitterlich, Mark G CIV NAVAIR, WD)
5. 03:46 PM - Re: Throttle Open on Shutdown ? (Phillip Salter)
6. 04:18 PM - Re: Throttle Open on Shutdown ? (Jon Blake)
Message 1
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hello ,
read this from my engine manual (Huosai HS6A)
4. Operation of the altitude governor for carburetor :
Carburetor attitude governor is used for adjusting the mixture ratio at altitude,
usually for climbing or level flight higher than 500 m. altitude.
The method of operation as follows:
a. Set the pitch changing control lever in the lower pitch position.
b. First fix the throttle in the required- operating speed position,
then slowly move altitude control lever to the "full close, direction,
un til the rotating speed reaches max. value (i.e. the sped. will drop
for further advancing the lever)..
c. Pull back the altitude control lever to "full open" direction, fix it
until the rotating speed drops slightly.
d. Adjust the engine to wanted rating with the throttle and the pitch changing
control lever.
Best Regards
Bruno
--------
Fly safe
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=443275#443275
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| Subject: | Re: Throttle Open on Shutdown ? |
I believe the reason is to drive the oil scavenge pump to return as much oil out
of the case as possible to the tank. This reduces the risk of hydraulic lock
on the next start up.
Herb Coussons
drc@wscare.com
> On Jun 8, 2015, at 10:10 PM, Ttail <ttail@internode.on.net> wrote:
>
>
> What is the reasoning behind Opening the Throttle to Full Open on engine Shut
Down ?
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=443258#443258
>
>
>
>
>
>
>
>
>
>
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| Subject: | Re: Throttle Open on Shutdown ? |
That is the reason for savaging the engine @ 70% X 15-20 sec. Opening the throttle
at idle/mag shutoff is to prevent post detonation kick backs. Does it cloud
the cylinders and cause washout of oil on the cylinder walls I don't know.
It does cut down on kick backs for me. Yes I shutdown with cylinder temps at 160.
That as measured on #3. Who knows what the other cylinders are at short of
jumping out and measuring the CHT with the laser.
Doc
Sent from my iPad
> On Jun 9, 2015, at 9:41 AM, Dr. Herbert Coussons <drc@wscare.com> wrote:
>
>
> I believe the reason is to drive the oil scavenge pump to return as much oil
out of the case as possible to the tank. This reduces the risk of hydraulic lock
on the next start up.
>
>
> Herb Coussons
> drc@wscare.com
>
>
>
>> On Jun 8, 2015, at 10:10 PM, Ttail <ttail@internode.on.net> wrote:
>>
>>
>> What is the reasoning behind Opening the Throttle to Full Open on engine Shut
Down ?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=443258#443258
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
Message 4
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| Subject: | Throttle Open on Shutdown ? |
Concur on scavenging which is a common procedure for various dry sump engines,
including a Lycoming GSO-480.
Opening the throttle on shutdown is something I would love to see an explanation
in writing on. Interpreted from the original Russian I mean! There is a ton
of urban legend on this one. The explanation I was given is that it helps
to seal the rings to reduce oil creeping past. Which was also accompanied by
the statement that once the prop stopped moving, you should not touch it or it
will "unseal" the rings.
Another piece of advice was to turn the prop BACKWARDS directly after shutdown
to help seal the ball check valve in the oil pump to help prevent leakage. I
tried that one and it actually seemed to make a difference, but that was purely
subjective.
Bottom line, lots of explanations... and I am not sure which one is actually correct...
but I do it anyway. :-)
Mark
________________________________
From: owner-yak-list-server@matronics.com [owner-yak-list-server@matronics.com]
on behalf of Roger Kemp [f16viperdoc@me.com]
Sent: Tuesday, June 09, 2015 5:47 PM
Subject: Re: Yak-List: Throttle Open on Shutdown ?
That is the reason for savaging the engine @ 70% X 15-20 sec. Opening the throttle
at idle/mag shutoff is to prevent post detonation kick backs. Does it cloud
the cylinders and cause washout of oil on the cylinder walls I don't know.
It does cut down on kick backs for me. Yes I shutdown with cylinder temps at 160.
That as measured on #3. Who knows what the other cylinders are at short of
jumping out and measuring the CHT with the laser.
Doc
Sent from my iPad
> On Jun 9, 2015, at 9:41 AM, Dr. Herbert Coussons <drc@wscare.com> wrote:
>
>
> I believe the reason is to drive the oil scavenge pump to return as much oil
out of the case as possible to the tank. This reduces the risk of hydraulic lock
on the next start up.
>
>
> Herb Coussons
> drc@wscare.com
>
>
>> On Jun 8, 2015, at 10:10 PM, Ttail <ttail@internode.on.net> wrote:
>>
>>
>> What is the reasoning behind Opening the Throttle to Full Open on engine Shut
Down ?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=443258#443258
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 5
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| Subject: | Re: Throttle Open on Shutdown ? |
Mark,
By moving your prop backwards slightly, it reverses or releives the pressure on
the check valve at the oil pump. I had good results.
Phil
-----Original Message-----
From: Bitterlich, Mark G CIV NAVAIR, WD, WD <mark.bitterlich@navy.mil>
Sent: Tue, Jun 9, 2015 5:23 pm
Subject: RE: Yak-List: Throttle Open on Shutdown ?
<mark.bitterlich@navy.mil>
Concur on scavenging which is a common procedure
for various dry sump engines, including a Lycoming GSO-480.
Opening the
throttle on shutdown is something I would love to see an explanation in writing
on. Interpreted from the original Russian I mean! There is a ton of urban
legend on this one. The explanation I was given is that it helps to seal the
rings to reduce oil creeping past. Which was also accompanied by the statement
that once the prop stopped moving, you should not touch it or it will "unseal"
the rings.
Another piece of advice was to turn the prop BACKWARDS
directly after shutdown to help seal the ball check valve in the oil pump to
help prevent leakage. I tried that one and it actually seemed to make a
difference, but that was purely subjective.
Bottom line, lots of
explanations... and I am not sure which one is actually correct... but I do it
anyway. :-)
Mark
________________________________
From:
owner-yak-list-server@matronics.com [owner-yak-list-server@matronics.com] on
behalf of Roger Kemp [f16viperdoc@me.com]
Sent: Tuesday, June 09, 2015 5:47
PM
Subject: Re: Yak-List: Throttle Open on Shutdown
?
That is
the reason for savaging the engine @ 70% X 15-20 sec. Opening the throttle at
idle/mag shutoff is to prevent post detonation kick backs. Does it cloud the
cylinders and cause washout of oil on the cylinder walls I don't know.
It does
cut down on kick backs for me. Yes I shutdown with cylinder temps at 160. That
as measured on #3. Who knows what the other cylinders are at short of jumping
out and measuring the CHT with the laser.
Doc
Sent from my iPad
> On Jun
9, 2015, at 9:41 AM, Dr. Herbert Coussons <drc@wscare.com> wrote:
>
> -->
Yak-List message posted by: "Dr. Herbert Coussons" <drc@wscare.com>
>
> I
believe the reason is to drive the oil scavenge pump to return as much oil out
of the case as possible to the tank. This reduces the risk of hydraulic lock on
the next start up.
>
>
> Herb Coussons
> drc@wscare.com
>
>
>> On Jun
8, 2015, at 10:10 PM, Ttail <ttail@internode.on.net> wrote:
>>
>> --> Yak-List
message posted by: "Ttail" <ttail@internode.on.net>
>>
>> What is the
reasoning behind Opening the Throttle to Full Open on engine Shut Down
?
>>
>>
>>
>>
>> Read this topic online here:
>>
>>
http://forums.matronics.com/viewtopic.php?p=443258#443258
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
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| Subject: | Re: Throttle Open on Shutdown ? |
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