Today's Message Index:
----------------------
1. 04:06 AM - Cleaning oil tank and cooler (JL2A)
2. 04:26 AM - Re: Cleaning oil tank and cooler (Richard Goode)
3. 06:34 AM - Re: Cleaning oil tank and cooler (cjpilot710@aol.com)
4. 07:03 AM - Re: Aileron Rigging Question (Larry Pine)
5. 07:33 AM - Emergency Air Bottle (AcroGimp)
6. 08:50 AM - (Larry Pine)
7. 02:07 PM - Re: (Dave Jester)
8. 06:49 PM - Re: Cleaning oil tank and cooler (JL2A)
9. 07:52 PM - Re: Re: Cleaning oil tank and cooler (cjpilot710@aol.com)
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| Subject: | Cleaning oil tank and cooler |
Any particular methods people use for this?
Our R985 powered aircraft recommends draining old oil, removing oil cooler thermostat
and filling with KEROSENE ONLY, leaving over night and draining in the
morning to get rid of sludge and sediment.
Any reason this could be harmful to CJ oil system? Kind of like that you don't
have to remove the tank & cooler with this method!
Thanks
Anatole
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447182#447182
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| Subject: | Cleaning oil tank and cooler |
I can say that, with the Russian oil cooler, cleaning with solvents will
never do a proper job which has to be done with ultrasonic cleansing. I
suspect the same holds for the Chinese one.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of JL2A
Sent: 18 September 2015 12:03
Subject: Yak-List: Cleaning oil tank and cooler
Any particular methods people use for this?
Our R985 powered aircraft recommends draining old oil, removing oil cooler
thermostat and filling with KEROSENE ONLY, leaving over night and draining
in the morning to get rid of sludge and sediment.
Any reason this could be harmful to CJ oil system? Kind of like that you
don't have to remove the tank & cooler with this method!
Thanks
Anatole
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447182#447182
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| Subject: | Re: Cleaning oil tank and cooler |
I think a oil cooler can be kept efficient by doing number of things.
One. A good filter the in line on the way TO the cooler. Mine is a 10
micro filter and it is surprising how long the oil looks clean after a change.
Two. Changing the oil at regular intervals. Radials use a lot of oil,
and most operators (particularly the one with large P&W or Wrights) don't
find it economically advantages to dump 30 (sometime 50 gals) of oil all at
once. However our engine don't have those quantities and if you DON'T have a
fine filter it needs to be changed. I recommend every 30 hours (I forget
what the book calls) and quite frankly I change mine between 35 and 40
hours because of how clean my oil looks with the filter. The filter get
changed at the same time, is than cut opened and inspected.
Three. Because I have a filter, I usually clean my oil cooler every 2
years. That's about 200 to 250 hours of flying for me. Now if the cooler has
never been clean before or you're doing it for the first time, I recommend
what Richard says - an ultrasonic cleaning to the only to make sure the in
side is free and clear and clean. However what I do (because of having
the 10 micro filter) is remove the cooler from the airplane and put it in my
parts washer, turn on the pump, and walk away for a couple of hours.
Four. Use detergent Oil. This is pretty important. The crap that builds
up from internal combustion stays suspended in detergent oil and is thus
taken out by the filter. However this is something to remember DON"T put
detergent oil into an engine that has never used it. The reason is the
detergent oil will brake up the sludge which may end up blocking a oil passage.
Of course this will effect an oil cooler too.
A good number of years ago, I was told that any particulate in an engine
oil system that was over 25 micros in size, would cause ware of the internal
engines parts. Of course the normal engine oil screen allows much larger
stuff to pass (something like - only stopping stuff with part numbers). In
the initial design of these engines for a government, it wasn't considered
necessary. But I've seen large engines (1820s & 1830s) with 25 micro
filter go well over 1,000 hours before being changed and still running well and
good compressions. In WW2 they were changed around 400 hours.
So once you get that oil cooler cleaned, putting on a good filter, will
keep it and the rest of the engine clean much longer.
Jim "Pappy" Goolsby
In a message dated 9/18/2015 7:26:55 A.M. Eastern Daylight Time,
richard.goode@russianaeros.com writes:
--> Yak-List message posted by: "Richard Goode"
<richard.goode@russianaeros.com>
I can say that, with the Russian oil cooler, cleaning with solvents will
never do a proper job which has to be done with ultrasonic cleansing. I
suspect the same holds for the Chinese one.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of JL2A
Sent: 18 September 2015 12:03
Subject: Yak-List: Cleaning oil tank and cooler
Any particular methods people use for this?
Our R985 powered aircraft recommends draining old oil, removing oil cooler
thermostat and filling with KEROSENE ONLY, leaving over night and draining
in the morning to get rid of sludge and sediment.
Any reason this could be harmful to CJ oil system? Kind of like that you
don't have to remove the tank & cooler with this method!
Thanks
Anatole
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447182#447182
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Message 4
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| Subject: | Re: Aileron Rigging Question |
=0A=0ASent from Yahoo Mail on Android=0A=0AFrom:"Larry Pine" <threein60@yah
oo.com>=0ADate:Thu, Sep 17, 2015 at 9:01=0ASubject:Aileron Rigging Question
=0A=0ALooking for a little help with the fine details of aileron rigging.
- I searched the archives and maintenance manuals, but no joy.- In orde
r to confirm my aileron system was reconstructed properly, I wanted to ensu
re I have the correct CJ process.- Below is what I believe the correct pr
ocess is:=0A1.--- Level aircraft or use nose offset in the math to ca
lculate aircraft level during calculations (level set off rails)=0A2.--
- Center stick and lock in place.=0A3.--- Place the aileron rocker
arms in neutral position and lock in place (is there a locking or alignment
whole to verify neutral?) =0A4.--- Rig aileron trailing edge to matc
h camber of wing.=0A5.--- Adjust limit bolts at bottom of aft stick t
o achieve max up aileron deflection (book value) (measure along #8 wing rib
) and lower deflection is a matter of mechanical design=0A=0ADoes this soun
d correct?- Am I missing something or some tricks that were learned by ot
hers?=0A=0AThanks in advance=0ALarry Pine=0A=0A=0A=0A=0A
Message 5
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| Subject: | Emergency Air Bottle |
Anybody know if the CJ emergency air bottle is interchangeable for a Yak-52?
Thanks
'Gimp
--------
Owner/Pilot N6209F 1987 Yak-52
COMM/ASEL/IFR/HP-Complex/TW
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447192#447192
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Test
Sent from Yahoo Mail on Android
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B- at best...
Sent from my iPad
> On Sep 18, 2015, at 10:46 AM, Larry Pine <threein60@yahoo.com> wrote:
>
>
> Test
>
> Sent from Yahoo Mail on Android
>
>
>
>
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| Subject: | Re: Cleaning oil tank and cooler |
well - Jim you've hit the nail on the head here - my oil has always been straight
mineral oil (Aeroshell 100) and I've got a barrel of Phillips 25W-60 I wanna
use!
I was told the same thing - never switch to AD oil if you've been on straight -
however on further investigation I'm told it can be done, first by cleaning tank
and cooler, then by slowly introducing the AD oil, 1 quart at a time, and
checking & cleaning oil screens regularly as it is introduced.
After all, weren't all our CJs run on straight oil in China, and lots of folks
are running AD oils which means they must have changed over at some point?
I've had an oil pump fail on the delivery flight - less than 2 hours since 'overhaul'
and we got a HEAP of sludge in the screen. A lot must've gone through and
ground the oil pump housing out a bit, causing it to slowly fail.
So I'm thinking ultrasonic cleaning and slow introduction with lots of checking
may be ok?
I spoke to a very well known aircraft engine oil tech and he said AD is something
that locks on to the unburnt fuel molecules in the oil, which are some of the
nastier stuff to have as they form corrosive molecules with moisture very quickly.
I thought it was an old wives tail that they were a 'detergent'
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447211#447211
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| Subject: | Re: Cleaning oil tank and cooler |
Well right now know that I am NOT a chemist in any stretch of the
imagination. "AD" oils have always been "detergent" oil to me. I learn this
on
the knee best engine mechanic that EAL had, my Dad. I have NO idea what kind
of oil they used in China. Doug Sapp could elucidate us there. And there
are guys on this list who really really know oil. Please step in.
Anyway cleaning the oil tank, and cooler, will get the sludge out there for
sure, but it can still be stuck in places in the engine. Can it be done?
- - - I guess so, but I'd be personally on pins and needles for several oil
changes and I'd do them more often. And I don't think I'd do it on an
engine that had a lot time on it using mineral oil. That stuff builds up
over operating time.
I do not use 25w-60. I know of a number people who swear by it. Every
time I use it my M-14p I get oil leaks. I do NOT know why, but I get oil
every where. I use 100 and in the summer I go to 120.
I know that 'back when' the procedure for a new overhaul engine was to
'break-in with straight mineral oil, that done switch to AD oils. One could
STAY on mineral oil if one wanted to, but most mechanics considered AD
better. I know you can see the difference on a tear down on an engine if it had
used mineral oil or AD. An AD engine was much cleaner on the inside. But
I believe there are even some engine that are required to use mineral oil.
JIm "Pappy" Goolsby
In a message dated 9/18/2015 9:50:24 P.M. Eastern Daylight Time,
info@flyingwarbirds.com.au writes:
--> Yak-List message posted by: "JL2A" <info@flyingwarbirds.com.au>
well - Jim you've hit the nail on the head here - my oil has always been
straight mineral oil (Aeroshell 100) and I've got a barrel of Phillips
25W-60 I wanna use!
I was told the same thing - never switch to AD oil if you've been on
straight - however on further investigation I'm told it can be done, first by
cleaning tank and cooler, then by slowly introducing the AD oil, 1 quart at a
time, and checking & cleaning oil screens regularly as it is introduced.
After all, weren't all our CJs run on straight oil in China, and lots of
folks are running AD oils which means they must have changed over at some
point?
I've had an oil pump fail on the delivery flight - less than 2 hours since
'overhaul' and we got a HEAP of sludge in the screen. A lot must've gone
through and ground the oil pump housing out a bit, causing it to slowly fail.
So I'm thinking ultrasonic cleaning and slow introduction with lots of
checking may be ok?
I spoke to a very well known aircraft engine oil tech and he said AD is
something that locks on to the unburnt fuel molecules in the oil, which are
some of the nastier stuff to have as they form corrosive molecules with
moisture very quickly. I thought it was an old wives tail that they were a
'detergent'
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447211#447211
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