Today's Message Index:
----------------------
1. 02:04 PM - Re: The Hydraulic lock (Chris Wise)
2. 03:05 PM - Re: Re: The Hydraulic lock (Roger Kemp M.D.)
3. 04:45 PM - Re: Re: The Hydraulic lock (Keith Pickford)
4. 06:50 PM - Re: Re: The Hydraulic lock (Roger Kemp M.D.)
5. 06:56 PM - Aircraft Parts For Sale (Nanchang CJ6)
6. 07:04 PM - S&F (cjpilot710@aol.com)
7. 11:09 PM - Re: The Hydraulic lock (Francois Davel)
Message 1
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| Subject: | Re: The Hydraulic lock |
G'Day Francois,
You are spot on.
A friend of mine has a 52. He went to fly it after standing for 2 1/2
weeks and found 2 litres of oil in the tank.
We have had similar problems and have refaced the oil non return valve.
In spite of that, we then also had a locked up engine 3 weeks ago after
not flying for 3 weeks.
There are others in Australia that sing the same tune.
To solve the problem, my mate with the 52 and I have already bought the
oil shut off valve and scavenge pump set up from Jim Kimball and as we
speak are busy installing these items to our aircraft.
I think that the shut off valve on its own should suffice, but we both
decided to fit the oil scavenge pump as well as an extra safeguard.
You may think that US$300 plus $300 for the pump = US$700 is too
expensive, but it is a small price to pay to prevent that dreaded bang
of hydraulic lock and an engine strip and rebuild.
Good luck with it all Francois.
Cheers, Chris.
----- Original Message -----
From: Francois Davel
To: annie@flygal.co.za ; adamsfamily@telkomsa.net ; lushd@mweb.co.za ;
gpw678@aol.com ; greg@rwa.co.za ; skywrite@iafrica.com ;
ecapea@telkomsa.net ; roger@spikeapparel.co.za ; williamo@iafrica.com ;
mcarstens@mweb.co.za
Cc: tmo34003@bigpond.net.au ; Chris Wise ; Golfcartpro ;
lushd@mweb.co.za
Sent: Thursday, February 25, 2010 6:52 AM
Subject: The Hydraulic lock
Hi there Fellow aviators, Friends and Yak owners
As the subjects of the e mail shows, this is something serious..
The one thing we all fear is the Hydraulic lock......
I must say that when it happens it is really frightful.....so we
should all fear it!!!
So we do many things to save ourselves from this most horrible
experience:
We pull blades
We have manifold drains
We run the engine at 65% for 20 seconds at shutdown...
All in an attempt to stop this from happening to us.
Well while all this helps it does not solve the problem...I am now
speaking from experience so I would like to share what has happened to
me and offer you another solution.
I did what we all know what we should do, pulling blades through and
making sure there is no oil in the cylinders, and when I find or feel a
"lock" I do the right thing and removed the cowls remove the plugs and
allow the oil to drain, we even pull the blades through with the plugs
out, so making sure there is no oil hidden anywhere. Well this was what
I did AND I got a hydraulic lock and am living with the results of
that.. However can you spot the mistake?
While I had the plugs out and was pulling the blades the cylinders 5 +
6 were getting air from the open plug hole. While had a let the oil
drain out, and replaced the plugs and then pulled the blades I would
have sucked air through the inlet valve and so also sucked the oil in
that was in the inlet manifold..while I do have a manifold drain and it
was open, there must have been oil there. Since this what I did:
The plugs are replaced, since I thought all was fine since no extra
oil came out. Bearing in mind that I had not replaced the plugs while
pulling the blades.
So no oil meant I could get in and prime and start the engine, the
engine fired a couple of times and comes to sudden halt.
This is when you know all is not as it should be.
Now the question why? I did the right things, everything I have been
taught to do.
Simple I did not get the oil out...and oil causes the "Lock".
So to stop the Lock we need to exclude the reason for the Lock,
OIL!!!!
I do not take any credit for this since the guys on the forum (follow
this link -
http://forums.matronics.com/viewforum.php?f=60&sid-17d1dd056024aec1
842940271d50fa ) have done the thinking.
We need to install an oil shut off valve. See the picture below:
This is a cable operated valve that is manually closed after shut down
and in the closed position it cut the start circuit by means of a micro
switch (not shown) so if it closed the engine cannot start..
I am in the process of looking into having this made here in SA (this
one is from the USA and costs $300), so if you are interested, I will
put you in contact with the right people since I am sure we could make
it cheaper.
However, the purpose of the e mail is to tell you guys that we are all
living dangerously..we are all allowing oil to get into the engine, and
we all doing what we have been taught to do, but this is not good
enough..get rid of the oil!!!
I must just add that I can say we are a tight band of brothers and
sister, in this time I have been offered help with parts, advice, and
contacts, for all of which I am eternally grateful. Thank you friends.
I am also in the process of working on a system by which you can
remove the bent rod from the engine and replace it without removing the
engine from the plane. This has not been completed yet, so once we (the
AMO and I) have done this I will send out the method to those that are
interested. This has been done before but it seems the method has been
very closely guarded.
Keep safe keep oil free, and please be careful of the Lock...
Cheers
Francois
Regards,
Francois Davel
================
Regional Manager
Senninger Irrigation, Inc.
fdavel@senninger.com
+27 82 414 3762 (Cell)
+27 86 600 7583 (Fax)
www.senninger.com
================
NOTICE: This Senninger Irrigation Inc. e-mail message (including any
file attachment) is intended only for the use of the individual or
entity to which it is addressed, and may contain information that is
privileged and/or confidential. If you are not the intended recipient,
any dissemination, distribution or copying of this communication is
strictly prohibited. If you have received this communication in error,
please notify the sender immediately by reply e-mail or a collect
telephone call and delete or destroy all copies of this message and any
file attachment. Thank you!
-------------------------------------------------------------------------
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Checked by AVG - www.avg.com
02/06/10 19:35:00
Message 2
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| Subject: | Re: The Hydraulic lock |
Another way is to simply drain the sump into a sealed 5 gal fuel can
(plastic of course). The oil can then be poured back into the main tank
before the next flight. Dennis Savarese can provide the details for making
this simple but effective modification. One of my hanger mates has made this
simple mod. He leaves his plane un-flown for 2-3 months using this sealed
system. He does not have a drop of oil in the intake drain over flow catch
bucket nor the exhaust stack drain buckets at 2 months currently. It was
cheaper than the $700 oil cut-off kit.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Chris Wise
Sent: Wednesday, February 24, 2010 4:03 PM
Subject: Yak-List: Re: The Hydraulic lock
G'Day Francois,
You are spot on.
A friend of mine has a 52. He went to fly it after standing for 2 1/2 weeks
and found 2 litres of oil in the tank.
We have had similar problems and have refaced the oil non return valve.
In spite of that, we then also had a locked up engine 3 weeks ago after not
flying for 3 weeks.
There are others in Australia that sing the same tune.
To solve the problem, my mate with the 52 and I have already bought the oil
shut off valve and scavenge pump set up from Jim Kimball and as we speak are
busy installing these items to our aircraft.
I think that the shut off valve on its own should suffice, but we both
decided to fit the oil scavenge pump as well as an extra safeguard.
You may think that US$300 plus $300 for the pump = US$700 is too expensive,
but it is a small price to pay to prevent that dreaded bang of hydraulic
lock and an engine strip and rebuild.
Good luck with it all Francois.
Cheers, Chris.
----- Original Message -----
From: Francois Davel <mailto:fdavel@senninger.biz>
gpw678@aol.com ; greg@rwa.co.za ; skywrite@iafrica.com ; ecapea@telkomsa.net
; roger@spikeapparel.co.za ; williamo@iafrica.com ; mcarstens@mweb.co.za
Cc: tmo34003@bigpond.net.au ; Chris Wise <mailto:wise@txc.net.au> ;
Golfcartpro <mailto:info@golfcartpro.co.za> ; lushd@mweb.co.za
Sent: Thursday, February 25, 2010 6:52 AM
Subject: The Hydraulic lock
Hi there Fellow aviators, Friends and Yak owners
As the subjects of the e mail shows, this is something serious..
The one thing we all fear is the Hydraulic lock......
I must say that when it happens it is really frightful.....so we should all
fear it!!!
So we do many things to save ourselves from this most horrible experience:
We pull blades
We have manifold drains
We run the engine at 65% for 20 seconds at shutdown...
All in an attempt to stop this from happening to us.
Well while all this helps it does not solve the problem...I am now speaking
from experience so I would like to share what has happened to me and offer
you another solution.
I did what we all know what we should do, pulling blades through and making
sure there is no oil in the cylinders, and when I find or feel a "lock" I do
the right thing and removed the cowls remove the plugs and allow the oil to
drain, we even pull the blades through with the plugs out, so making sure
there is no oil hidden anywhere. Well this was what I did AND I got a
hydraulic lock and am living with the results of that.. However can you spot
the mistake?
While I had the plugs out and was pulling the blades the cylinders 5 + 6
were getting air from the open plug hole. While had a let the oil drain out,
and replaced the plugs and then pulled the blades I would have sucked air
through the inlet valve and so also sucked the oil in that was in the inlet
manifold..while I do have a manifold drain and it was open, there must have
been oil there. Since this what I did:
The plugs are replaced, since I thought all was fine since no extra oil
came out. Bearing in mind that I had not replaced the plugs while pulling
the blades.
So no oil meant I could get in and prime and start the engine, the engine
fired a couple of times and comes to sudden halt.
This is when you know all is not as it should be.
Now the question why? I did the right things, everything I have been taught
to do.
Simple I did not get the oil out...and oil causes the "Lock".
So to stop the Lock we need to exclude the reason for the Lock, OIL!!!!
I do not take any credit for this since the guys on the forum (follow this
link - http://forums.matronics.com/viewforum.php?f=60
<http://forums.matronics.com/viewforum.php?f=60&sid-17d1dd056024aec1842940
271d50fa> &sid-17d1dd056024aec1842940271d50fa ) have done the thinking.
We need to install an oil shut off valve. See the picture below:
Oil shutoff valve.jpg
This is a cable operated valve that is manually closed after shut down and
in the closed position it cut the start circuit by means of a micro switch
(not shown) so if it closed the engine cannot start..
I am in the process of looking into having this made here in SA (this one is
from the USA and costs $300), so if you are interested, I will put you in
contact with the right people since I am sure we could make it cheaper.
However, the purpose of the e mail is to tell you guys that we are all
living dangerously..we are all allowing oil to get into the engine, and we
all doing what we have been taught to do, but this is not good enough..get
rid of the oil!!!
I must just add that I can say we are a tight band of brothers and sister,
in this time I have been offered help with parts, advice, and contacts, for
all of which I am eternally grateful. Thank you friends.
I am also in the process of working on a system by which you can remove the
bent rod from the engine and replace it without removing the engine from the
plane. This has not been completed yet, so once we (the AMO and I) have done
this I will send out the method to those that are interested. This has been
done before but it seems the method has been very closely guarded.
Keep safe keep oil free, and please be careful of the Lock...
Cheers
Francois
Regards,
Francois Davel
================
Regional Manager
Senninger Irrigation, Inc.
fdavel@senninger.com
+27 82 414 3762 (Cell)
+27 86 600 7583 (Fax)
www.senninger.com <http://www.senninger.com/>
================
NOTICE: This Senninger Irrigation Inc. e-mail message (including any file
attachment) is intended only for the use of the individual or entity to
which it is addressed, and may contain information that is privileged and/or
confidential. If you are not the intended recipient, any dissemination,
distribution or copying of this communication is strictly prohibited. If you
have received this communication in error, please notify the sender
immediately by reply e-mail or a collect telephone call and delete or
destroy all copies of this message and any file attachment. Thank you!
_____
Release Date: 02/06/10 19:35:00
Message 3
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| Subject: | Re: The Hydraulic lock |
The easiest fix is to fly at least every 2 weeks !!!
--- On Thu, 25/2/10, Roger Kemp M.D. <viperdoc@mindspring.com> wrote:
From: Roger Kemp M.D. <viperdoc@mindspring.com>
Subject: RE: Yak-List: Re: The Hydraulic lock
Another way is to simply drain the sump into a sealed 5 gal fuel can (plast
ic of course). The oil can then be poured back into the main tank before th
e next flight. Dennis Savarese can provide the details for making this simp
le but effective modification. One of my hanger mates has made this simple
mod. He leaves his plane un-flown for 2-3 months using this sealed system.
He does not have a drop of oil in the intake drain over flow catch bucket n
or the exhaust stack drain buckets at 2 months currently. It was cheaper th
an the $700 oil cut-off kit.
Doc
-
-
Message 4
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| Subject: | Re: The Hydraulic lock |
Shack.better to fly it weekly.the RU manual calls for pulling a min. of 8
blades every couple of weeks if the aircraft is going to sit. It calls for
pulling the plugs if it is going to sit longer than a month.
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Keith Pickford
Sent: Wednesday, February 24, 2010 6:02 PM
Subject: RE: Yak-List: Re: The Hydraulic lock
The easiest fix is to fly at least every 2 weeks !!!
--- On Thu, 25/2/10, Roger Kemp M.D. <viperdoc@mindspring.com> wrote:
From: Roger Kemp M.D. <viperdoc@mindspring.com>
Subject: RE: Yak-List: Re: The Hydraulic lock
Another way is to simply drain the sump into a sealed 5 gal fuel can
(plastic of course). The oil can then be poured back into the main tank
before the next flight. Dennis Savarese can provide the details for making
this simple but effective modification. One of my hanger mates has made this
simple mod. He leaves his plane un-flown for 2-3 months using this sealed
system. He does not have a drop of oil in the intake drain over flow catch
bucket nor the exhaust stack drain buckets at 2 months currently. It was
cheaper than the $700 oil cut-off kit.
Doc
http://www.matronics.com/Navigator?Yak-List
http://www.matronics.com/contribution
Message 5
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| Subject: | Aircraft Parts For Sale |
We can supply the aircraft parts as below.If there have anything you need, pls
contact with us.
1.Russian aircraft and relevant parts:
IL-76,Mi-17,Mig-29,Yak-18,An-2,Tu-154...
2.Chinese aircraft and relevant parts:
CJ6/PT6,Y-5,Y-7,Y-8,Y-12,Z- 9,MA60, K-8...
3.Europe aircraft and relevant parts:
B737-200/300/500, MD82, MD90,AIRBUS-A310/320...
4.Avionic device:
Aviation electronics, Navigation facility, Aviation parts, Cabin instruments,
Engine and its accessories...
Regards/Sarah
E-mail:lcdzkj@live.cn
Web:http://www.difane.cn/
--------
Sarah:86-13468610692
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=288080#288080
Message 6
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Guys & gals,
I need to get a number on who is going to come to S&F this year. Mostly
to get a discount on a hotel just 3.5 miles from the airport. I need a
minium of 10 to get a discount to $90/nite. The hotel is a good one and
a lot closer to the field than where the EAAWB stays.
The T-birds will be at the show this year.
I need to hear from those who are planning to need that hotel. Contact me
off list.
JIm "Pappy" Goolsby
Message 7
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| Subject: | Re: The Hydraulic lock |
I can take 3 days for a Hydraulic lock to form......That translates into a lot
fun flying, but a huge fuel bill.... :-(
--------
Round Engines RULE!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=288105#288105
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