Today's Message Index:
----------------------
1. 03:22 AM - Re: Multigrade oils (Richard Goode)
2. 07:50 AM - Re: Multigrade oils (Mark Davis)
3. 10:08 AM - Re: Dumb oil line question (A. Dennis Savarese)
4. 10:15 AM - Re: Dumb oil line question (George Coy)
5. 10:22 AM - Re: testing (doug sapp)
6. 10:43 AM - Re: testing (JON)
7. 11:11 AM - Re: Dumb oil line question (greg.barnhard@gmail.com)
8. 01:37 PM - Re: Dumb oil line question (A. Dennis Savarese)
9. 06:12 PM - Re: [Non-DoD Source] Re: Multigrade oils (Bitterlich, Mark G CIV NAVAIR, WD)
10. 06:30 PM - Re: Multigrade oils (Ernest Martinez)
11. 06:51 PM - Re: [Non-DoD Source] Re: Multigrade oils (Mark Davis)
12. 07:08 PM - Re: [Non-DoD Source] Re: Multigrade oils (Bitterlich, Mark G CIV NAVAIR, WD)
13. 07:09 PM - Re: [Non-DoD Source] Re: Multigrade oils (Bitterlich, Mark G CIV NAVAIR, WD)
Message 1
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Russian say that any start below +5=B0C should have a degree of
pre=97heat.
I understand your concern about the fuel, but my gut feeling is that it
is
not a serious concern. Firstly, I don't think that the fuel is going to
expand significantly, but if you are concerned, it would be easy to put
a
small plastic tube onto the tank overflow and guide any fuel well away
from
the heat.
I understand your issue about the oil cooler, but again if you heat
cooler
and engine and oil tank, and your ambient temperature is at least minus
5C,
then I'm sure you won't have a problem. Anything much below that, then I
think you need to have the aircraft in a hangar to do the job properly.
However, I have seen Russians starting these engines at -25C (and
outside!),
but using big hot air burners, so they clearly are not worried about
fire!
I don't know what Shell themselves recommend, but personally I would go
to
120 at over 30=B0 C ambient.
I have never heard of anyone in Europe using MMO, which is not to say it
doesn't work!
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Davis
Sent: 19 July 2016 21:57
Subject: RE: Yak-List: Multigrade oils
Richard,
My YAK is in an unheated hangar and I do occasionally fly in temps
as
low at 35 degrees. Engine heat is easy at home base, but warming the
oil
cooler excessively concerns me as some of the heat will rise up into the
fuel tank area and potentially cause expansion on a full tank of cold
fuel
which could lead to venting, putting fuel near the electric heat source.
I've been told that straight weight oils can cause issues when the
thermister opens the first time and the engine tries to push the cold
oil to
the engine. Any comments on that? Also, what is your general guideline
temperature on when to switch from 100 to 120 Aeroshell? I really would
prefer to be running the straight weight oils, but have avoided them as
I
occasionally take my YAK to Colorado up in the mountains where overnight
temperatures can drop below freezing in the spring and fall. Less leaks
would be nice.
As to Jill's comment on adding MMO to Phillips XC 25W60, I had
exhaust
valve issues three years in a row, one resulting in replacing a jug
while
running straight XC 25W60. Jill suggested adding MMO to the Phillips
and I
haven't had an issue since beginning that practice five years ago. As
they
say, you mileage may vary.
Mark Davis
N44YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Tuesday, July 19, 2016 9:49 AM
Subject: Yak-List: Multigrade oils
These engines were never designed to use oils that are as thin as the
multigrades, which is why they do leak oil when multigrade are used.
Also,
the advantages are relatively small, unless you are operating in very
cold
temperatures, when, in any case you should pre-heat. But, compared to
automotive use, cold starts are relatively infrequent.
Another issue that is often ignored is that these engines can corrode
badly
(particularly in the cylinders) if left without being run frequently.
Indeed
the official Russian documentation says that the engines should have
short-term conservation if not used every week! From this point of view,
as
someone else has remarked, Aeroshell plus is very good because it has
specific anti-corrosion additives.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
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Thanks Richard. I always appreciate your time to answer questions!
Mark Davis
N44YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Wednesday, July 20, 2016 4:21 AM
Subject: RE: Yak-List: Multigrade oils
Russian say that any start below +5=B0C should have a degree of
pre=97heat.
I understand your concern about the fuel, but my gut feeling is that it
is
not a serious concern. Firstly, I don't think that the fuel is going to
expand significantly, but if you are concerned, it would be easy to put
a
small plastic tube onto the tank overflow and guide any fuel well away
from
the heat.
I understand your issue about the oil cooler, but again if you heat
cooler
and engine and oil tank, and your ambient temperature is at least minus
5C,
then I'm sure you won't have a problem. Anything much below that, then I
think you need to have the aircraft in a hangar to do the job properly.
However, I have seen Russians starting these engines at -25C (and
outside!),
but using big hot air burners, so they clearly are not worried about
fire!
I don't know what Shell themselves recommend, but personally I would go
to
120 at over 30=B0 C ambient.
I have never heard of anyone in Europe using MMO, which is not to say it
doesn't work!
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Davis
Sent: 19 July 2016 21:57
Subject: RE: Yak-List: Multigrade oils
Richard,
My YAK is in an unheated hangar and I do occasionally fly in temps
as
low at 35 degrees. Engine heat is easy at home base, but warming the
oil
cooler excessively concerns me as some of the heat will rise up into the
fuel tank area and potentially cause expansion on a full tank of cold
fuel
which could lead to venting, putting fuel near the electric heat source.
I've been told that straight weight oils can cause issues when the
thermister opens the first time and the engine tries to push the cold
oil to
the engine. Any comments on that? Also, what is your general guideline
temperature on when to switch from 100 to 120 Aeroshell? I really would
prefer to be running the straight weight oils, but have avoided them as
I
occasionally take my YAK to Colorado up in the mountains where overnight
temperatures can drop below freezing in the spring and fall. Less leaks
would be nice.
As to Jill's comment on adding MMO to Phillips XC 25W60, I had
exhaust
valve issues three years in a row, one resulting in replacing a jug
while
running straight XC 25W60. Jill suggested adding MMO to the Phillips
and I
haven't had an issue since beginning that practice five years ago. As
they
say, you mileage may vary.
Mark Davis
N44YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Tuesday, July 19, 2016 9:49 AM
Subject: Yak-List: Multigrade oils
These engines were never designed to use oils that are as thin as the
multigrades, which is why they do leak oil when multigrade are used.
Also,
the advantages are relatively small, unless you are operating in very
cold
temperatures, when, in any case you should pre-heat. But, compared to
automotive use, cold starts are relatively infrequent.
Another issue that is often ignored is that these engines can corrode
badly
(particularly in the cylinders) if left without being run frequently.
Indeed
the official Russian documentation says that the engines should have
short-term conservation if not used every week! From this point of view,
as
someone else has remarked, Aeroshell plus is very good because it has
specific anti-corrosion additives.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
--
This message has been scanned for viruses and
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Message 3
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| Subject: | Re: Dumb oil line question |
If you look closely, the line that appears to go to the bottom of the oil tank
actually attaches to a fitting on the firewall. It's the line for the oil pressure.
Dennis.
Sent from my iPhone
> On Jul 19, 2016, at 10:22 PM, "greg.barnhard@gmail.com" <greg.barnhard@gmail.com>
wrote:
>
>
> Hello everyone,
>
> Sorry if this is a dumb question. I'm a relatively new Yak 52W owner. I've been
going through the maintenance manuals trying to figure it out but I can't seem
to find it. What is the purpose of the smaller line that comes off the bottom
center of the oil tank to the engine. Is that another return line? I know
the line that comes off the aircraft left side about half way up to the screen
down at the bottom aircraft right on the firewall then goes to the pump but for
the life of me I can't figure out what the line out of the bottom center does.
Unfortunately I am not near the plane to look at it and try to figure it out
and was hoping someone much smarter than I OM this list could enlighten me.
>
> Thanks!
> Greg
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=458398#458398
>
>
>
>
>
>
>
>
>
>
Message 4
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| Subject: | Re: Dumb oil line question |
I think Dennis means is the line for the oil dilution
Sent from my iPhone
> On Jul 20, 2016, at 1:07 PM, A. Dennis Savarese <dsavarese0812@bellsouth.net>
wrote:
>
>
> If you look closely, the line that appears to go to the bottom of the oil tank
actually attaches to a fitting on the firewall. It's the line for the oil pressure.
> Dennis.
>
> Sent from my iPhone
>
>> On Jul 19, 2016, at 10:22 PM, "greg.barnhard@gmail.com" <greg.barnhard@gmail.com>
wrote:
>>
>>
>> Hello everyone,
>>
>> Sorry if this is a dumb question. I'm a relatively new Yak 52W owner. I've been
going through the maintenance manuals trying to figure it out but I can't
seem to find it. What is the purpose of the smaller line that comes off the bottom
center of the oil tank to the engine. Is that another return line? I know
the line that comes off the aircraft left side about half way up to the screen
down at the bottom aircraft right on the firewall then goes to the pump but
for the life of me I can't figure out what the line out of the bottom center does.
Unfortunately I am not near the plane to look at it and try to figure it
out and was hoping someone much smarter than I OM this list could enlighten me.
>>
>> Thanks!
>> Greg
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=458398#458398
>
>
>
>
>
>
Message 5
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I am having the same problem. I sent this last week and saw or received
zip.
here it is again.
http://www.avweb.com/advideos/VIDEO-Lest-We-Forget-The-Vow-226519-1.html
Doug
On Tue, Jul 19, 2016 at 11:47 AM, Mike Holoman <mikeholoman@hotmail.com>
wrote:
> Try re sending Pappy
>
>
> ------------------------------
> *From:* owner-yak-list-server@matronics.com <
> owner-yak-list-server@matronics.com> on behalf of Ernest Martinez <
> erniel29@gmail.com>
> *Sent:* Tuesday, July 19, 2016 2:17 PM
> *To:* yak-list
> *Subject:* Re: Yak-List: testing
>
> I also didn't get the one you were going to send tomorrow.
>
> On Tue, Jul 19, 2016 at 10:12 AM, JON <jblake207@comcast.net> wrote:
>
>> Pappy, I didn't get your original post, but I did get this one from
>> Partington. JB
>>
>> ------------------------------
>> *From: *jlpartington@reagan.com
>> *To: *yak-list@matronics.com
>> *Sent: *Tuesday, July 19, 2016 8:51:24 AM
>> *Subject: *RE: Yak-List: testing
>>
>> got this one
>>
>> -----Original Message-----
>> From: cjpilot710@aol.com
>> Sent: Tuesday, 19 July, 2016 7:52am
>> To: yak-list@matronics.com
>> Subject: Yak-List: testing
>>
>> Is anyone getting my post? Usually when I post to the list, I get a
>> email from the list.
>>
>> Jim "Pappy" Goolsby
>>
>>
>>
>>
>>
>>
>
Message 6
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Great read Doug!=C2- Thanks for sharing...
----- Original Message -----
From: "doug sapp" <dougsappllc@gmail.com>
Sent: Wednesday, July 20, 2016 12:21:43 PM
Subject: Re: Yak-List: testing
I am having the same problem.=C2- I sent this last week and saw or receiv
ed zip.
here it is again.
http://www.avweb.com/advideos/VIDEO-Lest-We-Forget-The-Vow-226519-1.html
Doug
On Tue, Jul 19, 2016 at 11:47 AM, Mike Holoman < mikeholoman@hotmail.com >
wrote:
Try re sending Pappy
From: owner-yak-list-server@matronics.com < owner-yak-list-server@matronics
.com > on behalf of Ernest Martinez < erniel29@gmail.com >
Sent: Tuesday, July 19, 2016 2:17 PM
Subject: Re: Yak-List: testing
=C2-
I also didn't get the one you were going to send tomorrow.
On Tue, Jul 19, 2016 at 10:12 AM, JON < jblake207@comcast.net > wrote:
<blockquote>
Pappy, I didn't get your original post, but I did get this one from Parting
ton.=C2- JB
From: jlpartington@reagan.com
Sent: Tuesday, July 19, 2016 8:51:24 AM
Subject: RE: Yak-List: testing
got this one
-----Original Message-----
From: cjpilot710@aol.com
Sent: Tuesday, 19 July, 2016 7:52am
Subject: Yak-List: testing
Is anyone getting my post?=C2- Usually when I post to the list, I get a e
mail from the list.
=C2-
Jim "Pappy" Goolsby
=C2-
</blockquote>
Message 7
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| Subject: | Re: Dumb oil line question |
Thanks gentlemen. I'll have to look more closely at it.
Greg
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=458440#458440
Message 8
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| Subject: | Re: Dumb oil line question |
Not really George.=C2- I don't believe the TW has an oil dilution valve,
does it?=C2- The small flexible line that comes from the oil pump and goe
s under the oil tank and looks like it attaches to the oil tank.=C2- But
when you look closely, it passes the oil tank at fits to a male B-nut fitti
ng on the firewall.=C2- On the other side of the firewall are the two oil
pressure senders.Dennis
From: George Coy <george.coy@gmail.com>
To: yak-list@matronics.com
Sent: Wednesday, July 20, 2016 1:15 PM
Subject: Re: Yak-List: Dumb oil line question
I think Dennis means is the line for the oil dilution
Sent from my iPhone
> On Jul 20, 2016, at 1:07 PM, A. Dennis Savarese <dsavarese0812@bellsouth.
net> wrote:
>
outh.net>
>
> If you look closely, the line that appears to go to the bottom of the oil
tank actually attaches to a fitting on the firewall. It's the line for the
oil pressure.
> Dennis.
>
> Sent from my iPhone
>
>> On Jul 19, 2016, at 10:22 PM, "greg.barnhard@gmail.com" <greg.barnhard@g
mail.com> wrote:
>>
@gmail.com>
>>
>> Hello everyone,
>>
>> Sorry if this is a dumb question. I'm a relatively new Yak 52W owner. I'
ve been going through the maintenance manuals trying to figure it out but I
can't seem to find it. What is the purpose of the smaller line that comes
off the bottom center of the oil tank to the engine. Is that another return
line? I know the line that comes off the aircraft left side about half way
up to the screen down at the bottom aircraft right on the firewall then go
es to the pump but for the life of me I can't figure out what the line out
of the bottom center does. Unfortunately I am not near the plane to look at
it and try to figure it out and was hoping someone much smarter than I OM
this list could enlighten me.
>>
>> Thanks!
>> Greg
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=458398#458398
>
>
>
>
>
>
S -
WIKI -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 9
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Mark, you used the term "thermister" when I think you meant something called a
"veritherm". Are you sure your oil cooler actually has one? It is pretty easy
to tell on a regular day with normal temps. Watch your oil temp. As the engine
runs during your warmup, does the oil temp climb slowly into the green?
Or does it sit there with oil temps all the way to the left, and then ... more
or less... climb quickly into the green, and then DROP back down into the yellow?
If the former, you have no veritherm in the oil cooler. If the latter, you
probably do.
A lot has been said about pre-heating the engine, and NOT pre-heating the oil cooler.
Without a veritherm, the consensus is that when you start the engine,
even with pre-heated oil in the oil tank, and even with a pre-heated sump, there
is the possibility of a big slug of cold oil sitting in the oil cooler and
then being pumped into the engine. Lots of "oh crap" stories ensue. I have no
knowledge of this happen, but several folks swear that it has, so there you
go.
With the veriterm installed in the oil cooler, oil is BY-PASSED past the oil cooler.
No big slug of cold oil. As the oil temp comes up, the veritherm opens...
SLOWLY and that slug of cold oil is more or less "carefully" added to the
warm oil already in the engine. Exactly as your thermostat in your car works.
I mean EXACTLY.
So it is kind of important to know whether your oil cooler has a a veritherm (thermostate)
or not.
Mark
p.s. Most 50's, 52's and 55's, and Sukes, came without one.
________________________________
From: owner-yak-list-server@matronics.com [owner-yak-list-server@matronics.com]
on behalf of Mark Davis [markdavis@wbsnet.org]
Sent: Wednesday, July 20, 2016 10:49 AM
Subject: [Non-DoD Source] RE: Yak-List: Multigrade oils
Thanks Richard. I always appreciate your time to answer questions!
Mark Davis
N44YK
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Wednesday, July 20, 2016 4:21 AM
Subject: RE: Yak-List: Multigrade oils
Russian say that any start below +5C should have a degree of preheat.
I understand your concern about the fuel, but my gut feeling is that it is not
a serious concern. Firstly, I don't think that the fuel is going to expand significantly,
but if you are concerned, it would be easy to put a small plastic
tube onto the tank overflow and guide any fuel well away from the heat.
I understand your issue about the oil cooler, but again if you heat cooler and
engine and oil tank, and your ambient temperature is at least minus 5C, then I'm
sure you won't have a problem. Anything much below that, then I think you need
to have the aircraft in a hangar to do the job properly. However, I have seen
Russians starting these engines at -25C (and outside!), but using big hot
air burners, so they clearly are not worried about fire!
I don't know what Shell themselves recommend, but personally I would go to 120
at over 30 C ambient.
I have never heard of anyone in Europe using MMO, which is not to say it doesn't
work!
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com<http://www.russianaeros.com/>
From: owner-yak-list-server@matronics.com<mailto:owner-yak-list-server@matronics.com> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Davis
Sent: 19 July 2016 21:57
Subject: RE: Yak-List: Multigrade oils
Richard,
My YAK is in an unheated hangar and I do occasionally fly in temps as low
at 35 degrees. Engine heat is easy at home base, but warming the oil cooler
excessively concerns me as some of the heat will rise up into the fuel tank area
and potentially cause expansion on a full tank of cold fuel which could lead
to venting, putting fuel near the electric heat source. I've been told that
straight weight oils can cause issues when the thermister opens the first time
and the engine tries to push the cold oil to the engine. Any comments on that?
Also, what is your general guideline temperature on when to switch from 100
to 120 Aeroshell? I really would prefer to be running the straight weight
oils, but have avoided them as I occasionally take my YAK to Colorado up in the
mountains where overnight temperatures can drop below freezing in the spring
and fall. Less leaks would be nice.
As to Jill's comment on adding MMO to Phillips XC 25W60, I had exhaust valve
issues three years in a row, one resulting in replacing a jug while running
straight XC 25W60. Jill suggested adding MMO to the Phillips and I haven't had
an issue since beginning that practice five years ago. As they say, you mileage
may vary.
Mark Davis
N44YK
From: owner-yak-list-server@matronics.com<mailto:owner-yak-list-server@matronics.com> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Tuesday, July 19, 2016 9:49 AM
Subject: Yak-List: Multigrade oils
These engines were never designed to use oils that are as thin as the multigrades,
which is why they do leak oil when multigrade are used. Also, the advantages
are relatively small, unless you are operating in very cold temperatures, when,
in any case you should pre-heat. But, compared to automotive use, cold starts
are relatively infrequent.
Another issue that is often ignored is that these engines can corrode badly (particularly
in the cylinders) if left without being run frequently. Indeed the
official Russian documentation says that the engines should have short-term conservation
if not used every week! From this point of view, as someone else has
remarked, Aeroshell plus is very good because it has specific anti-corrosion
additives.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com<http://www.russianaeros.com/>
--
This message has been scanned for viruses and
dangerous content by MailScanner<http://www.mailscanner.info/>, and is
believed to be clean.
Message 10
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| Subject: | Re: Multigrade oils |
I think you mean a vernatherm.
On Wednesday, July 20, 2016, Bitterlich, Mark G CIV NAVAIR, WD <
mark.bitterlich@navy.mil> wrote:
> mark.bitterlich@navy.mil <javascript:;>>
>
> Mark, you used the term "thermister" when I think you meant something
> called a "veritherm". Are you sure your oil cooler actually has one? It
is
> pretty easy to tell on a regular day with normal temps. Watch your oil
> temp. As the engine runs during your warmup, does the oil temp climb
> slowly into the green?
>
>
> Or does it sit there with oil temps all the way to the left, and then ...
> more or less... climb quickly into the green, and then DROP back down int
o
> the yellow? If the former, you have no veritherm in the oil cooler. If
> the latter, you probably do.
>
>
> A lot has been said about pre-heating the engine, and NOT pre-heating the
> oil cooler. Without a veritherm, the consensus is that when you start th
e
> engine, even with pre-heated oil in the oil tank, and even with a
> pre-heated sump, there is the possibility of a big slug of cold oil sitti
ng
> in the oil cooler and then being pumped into the engine. Lots of "oh cra
p"
> stories ensue. I have no knowledge of this happen, but several folks swe
ar
> that it has, so there you go.
>
>
> With the veriterm installed in the oil cooler, oil is BY-PASSED past the
> oil cooler. No big slug of cold oil. As the oil temp comes up, the
> veritherm opens... SLOWLY and that slug of cold oil is more or less
> "carefully" added to the warm oil already in the engine. Exactly as your
> thermostat in your car works. I mean EXACTLY.
>
>
> So it is kind of important to know whether your oil cooler has a a
> veritherm (thermostate) or not.
>
>
> Mark
>
>
> p.s. Most 50's, 52's and 55's, and Sukes, came without one.
>
>
> ________________________________
> From: owner-yak-list-server@matronics.com <javascript:;> [
> owner-yak-list-server@matronics.com <javascript:;>] on behalf of Mark
> Davis [markdavis@wbsnet.org <javascript:;>]
> Sent: Wednesday, July 20, 2016 10:49 AM
> To: yak-list@matronics.com <javascript:;>
> Subject: [Non-DoD Source] RE: Yak-List: Multigrade oils
>
> Thanks Richard. I always appreciate your time to answer questions!
>
> Mark Davis
> N44YK
>
> From: owner-yak-list-server@matronics.com <javascript:;> [mailto:
> owner-yak-list-server@matronics.com <javascript:;>] On Behalf Of Richard
> Goode
> Sent: Wednesday, July 20, 2016 4:21 AM
> To: yak-list@matronics.com <javascript:;>
> Subject: RE: Yak-List: Multigrade oils
>
> Russian say that any start below +5=C2=B0C should have a degree of pre
=94heat.
>
> I understand your concern about the fuel, but my gut feeling is that it i
s
> not a serious concern. Firstly, I don't think that the fuel is going to
> expand significantly, but if you are concerned, it would be easy to put a
> small plastic tube onto the tank overflow and guide any fuel well away fr
om
> the heat.
>
> I understand your issue about the oil cooler, but again if you heat coole
r
> and engine and oil tank, and your ambient temperature is at least minus 5
C,
> then I'm sure you won't have a problem. Anything much below that, then I
> think you need to have the aircraft in a hangar to do the job properly.
> However, I have seen Russians starting these engines at -25C (and
> outside!), but using big hot air burners, so they clearly are not worrie
d
> about fire!
>
> I don't know what Shell themselves recommend, but personally I would go t
o
> 120 at over 30=C2=B0 C ambient.
>
> I have never heard of anyone in Europe using MMO, which is not to say it
> doesn't work!
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com<http://www.russianaeros.com/>
>
> From: owner-yak-list-server@matronics.com <javascript:;><mailto:
> owner-yak-list-server@matronics.com <javascript:;>> [mailto:
> owner-yak-list-server@matronics.com <javascript:;>] On Behalf Of Mark
> Davis
> Sent: 19 July 2016 21:57
> To: yak-list@matronics.com <javascript:;><mailto:yak-list@matronics.com
> <javascript:;>>
> Subject: RE: Yak-List: Multigrade oils
>
> Richard,
> My YAK is in an unheated hangar and I do occasionally fly in temps
> as low at 35 degrees. Engine heat is easy at home base, but warming the
> oil cooler excessively concerns me as some of the heat will rise up into
> the fuel tank area and potentially cause expansion on a full tank of cold
> fuel which could lead to venting, putting fuel near the electric heat
> source. I've been told that straight weight oils can cause issues when t
he
> thermister opens the first time and the engine tries to push the cold oil
> to the engine. Any comments on that? Also, what is your general guideli
ne
> temperature on when to switch from 100 to 120 Aeroshell? I really would
> prefer to be running the straight weight oils, but have avoided them as I
> occasionally take my YAK to Colorado up in the mountains where overnight
> temperatures can drop below freezing in the spring and fall. Less leaks
> would be nice.
>
> As to Jill's comment on adding MMO to Phillips XC 25W60, I had exhaus
t
> valve issues three years in a row, one resulting in replacing a jug while
> running straight XC 25W60. Jill suggested adding MMO to the Phillips an
d
> I haven't had an issue since beginning that practice five years ago. As
> they say, you mileage may vary.
>
> Mark Davis
> N44YK
>
>
> From: owner-yak-list-server@matronics.com <javascript:;><mailto:
> owner-yak-list-server@matronics.com <javascript:;>> [mailto:
> owner-yak-list-server@matronics.com <javascript:;>] On Behalf Of Richard
> Goode
> Sent: Tuesday, July 19, 2016 9:49 AM
> To: yak-list@matronics.com <javascript:;><mailto:yak-list@matronics.com
> <javascript:;>>
> Subject: Yak-List: Multigrade oils
>
> These engines were never designed to use oils that are as thin as the
> multigrades, which is why they do leak oil when multigrade are used. Also
,
> the advantages are relatively small, unless you are operating in very col
d
> temperatures, when, in any case you should pre-heat. But, compared to
> automotive use, cold starts are relatively infrequent.
>
> Another issue that is often ignored is that these engines can corrode
> badly (particularly in the cylinders) if left without being run frequentl
y.
> Indeed the official Russian documentation says that the engines should ha
ve
> short-term conservation if not used every week! From this point of view,
as
> someone else has remarked, Aeroshell plus is very good because it has
> specific anti-corrosion additives.
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com<http://www.russianaeros.com/>
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner<http://www.mailscanner.info/>, and is
> believed to be clean.
>
>
===========
===========
===========
===========
===========
>
>
Message 11
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|
| Subject: | Re: Multigrade oils |
Mark, maybe I used the wrong term, but the oil temp comes up into band and then
drops out of band low the first time it opens. It doesn't appear to be gradual
at all. It typically happens during engine run up. It's noticeable and I wait
for it to open and warm back up before I add takeoff power. I use a restrictor
plate on the oil cooler inlet for cold weather. Once the initial slug of
cold oil is circulated the oil temp stays stable as regulated by air flow over
the cylinders and through the oil cooler.
Mark Davis
N44YK
Sent from my iPhone
> On Jul 20, 2016, at 7:11 PM, Bitterlich, Mark G CIV NAVAIR, WD <mark.bitterlich@navy.mil>
wrote:
>
>
> Mark, you used the term "thermister" when I think you meant something called
a "veritherm". Are you sure your oil cooler actually has one? It is pretty easy
to tell on a regular day with normal temps. Watch your oil temp. As the engine
runs during your warmup, does the oil temp climb slowly into the green?
>
>
>
> Or does it sit there with oil temps all the way to the left, and then ... more
or less... climb quickly into the green, and then DROP back down into the yellow?
If the former, you have no veritherm in the oil cooler. If the latter,
you probably do.
>
>
>
> A lot has been said about pre-heating the engine, and NOT pre-heating the oil
cooler. Without a veritherm, the consensus is that when you start the engine,
even with pre-heated oil in the oil tank, and even with a pre-heated sump, there
is the possibility of a big slug of cold oil sitting in the oil cooler and
then being pumped into the engine. Lots of "oh crap" stories ensue. I have
no knowledge of this happen, but several folks swear that it has, so there you
go.
>
>
>
> With the veriterm installed in the oil cooler, oil is BY-PASSED past the oil
cooler. No big slug of cold oil. As the oil temp comes up, the veritherm opens...
SLOWLY and that slug of cold oil is more or less "carefully" added to the
warm oil already in the engine. Exactly as your thermostat in your car works.
I mean EXACTLY.
>
>
>
> So it is kind of important to know whether your oil cooler has a a veritherm
(thermostate) or not.
>
>
>
> Mark
>
>
>
> p.s. Most 50's, 52's and 55's, and Sukes, came without one.
>
>
>
> ________________________________
> From: owner-yak-list-server@matronics.com [owner-yak-list-server@matronics.com]
on behalf of Mark Davis [markdavis@wbsnet.org]
> Sent: Wednesday, July 20, 2016 10:49 AM
> To: yak-list@matronics.com
> Subject: [Non-DoD Source] RE: Yak-List: Multigrade oils
>
> Thanks Richard. I always appreciate your time to answer questions!
>
> Mark Davis
> N44YK
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
> Sent: Wednesday, July 20, 2016 4:21 AM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: Multigrade oils
>
> Russian say that any start below +5C should have a degree of preheat.
>
> I understand your concern about the fuel, but my gut feeling is that it is not
a serious concern. Firstly, I don't think that the fuel is going to expand significantly,
but if you are concerned, it would be easy to put a small plastic
tube onto the tank overflow and guide any fuel well away from the heat.
>
> I understand your issue about the oil cooler, but again if you heat cooler and
engine and oil tank, and your ambient temperature is at least minus 5C, then
I'm sure you won't have a problem. Anything much below that, then I think you
need to have the aircraft in a hangar to do the job properly. However, I have
seen Russians starting these engines at -25C (and outside!), but using big hot
air burners, so they clearly are not worried about fire!
>
> I don't know what Shell themselves recommend, but personally I would go to 120
at over 30 C ambient.
>
> I have never heard of anyone in Europe using MMO, which is not to say it doesn't
work!
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com<http://www.russianaeros.com/>
>
> From: owner-yak-list-server@matronics.com<mailto:owner-yak-list-server@matronics.com> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Davis
> Sent: 19 July 2016 21:57
> To: yak-list@matronics.com<mailto:yak-list@matronics.com>
> Subject: RE: Yak-List: Multigrade oils
>
> Richard,
> My YAK is in an unheated hangar and I do occasionally fly in temps as low
at 35 degrees. Engine heat is easy at home base, but warming the oil cooler
excessively concerns me as some of the heat will rise up into the fuel tank area
and potentially cause expansion on a full tank of cold fuel which could lead
to venting, putting fuel near the electric heat source. I've been told that
straight weight oils can cause issues when the thermister opens the first time
and the engine tries to push the cold oil to the engine. Any comments on that?
Also, what is your general guideline temperature on when to switch from
100 to 120 Aeroshell? I really would prefer to be running the straight weight
oils, but have avoided them as I occasionally take my YAK to Colorado up in the
mountains where overnight temperatures can drop below freezing in the spring
and fall. Less leaks would be nice.
>
> As to Jill's comment on adding MMO to Phillips XC 25W60, I had exhaust valve
issues three years in a row, one resulting in replacing a jug while running
straight XC 25W60. Jill suggested adding MMO to the Phillips and I haven't
had an issue since beginning that practice five years ago. As they say, you mileage
may vary.
>
> Mark Davis
> N44YK
>
>
> From: owner-yak-list-server@matronics.com<mailto:owner-yak-list-server@matronics.com> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
> Sent: Tuesday, July 19, 2016 9:49 AM
> To: yak-list@matronics.com<mailto:yak-list@matronics.com>
> Subject: Yak-List: Multigrade oils
>
> These engines were never designed to use oils that are as thin as the multigrades,
which is why they do leak oil when multigrade are used. Also, the advantages
are relatively small, unless you are operating in very cold temperatures,
when, in any case you should pre-heat. But, compared to automotive use, cold
starts are relatively infrequent.
>
> Another issue that is often ignored is that these engines can corrode badly (particularly
in the cylinders) if left without being run frequently. Indeed the
official Russian documentation says that the engines should have short-term
conservation if not used every week! From this point of view, as someone else
has remarked, Aeroshell plus is very good because it has specific anti-corrosion
additives.
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com<http://www.russianaeros.com/>
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner<http://www.mailscanner.info/>, and is
> believed to be clean.
>
>
>
>
>
Message 12
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|
| Subject: | Re: Multigrade oils |
A temperature controlled device that regulates the flow of oil through an oil cooler
mounted on an aircraft engine. When cold, the oil cooler is by-passed completely
allowing the oil to come up to temperature more quickly than when not
installed. Better known as a "thermostat" as the oil temperature increases,
the valve opens allowing a slow flow of oil through the oil cooler. This initially
allows cold oil to mix with the warmer oil. This will in turn cause the
oil temperature gage to decrease, as will be observed by cockpit indications.
As the engine continues to warm, indicated oil temperature will slowly increase
back to normal indications, usually in the green, depending on cold temperature
extremes.
The impact of this device will reduce temperature excursions, and reduce the necessity
of continual operation of the oil cooler outlet air dampener, as controlled
by the cockpit oil cooler door control. Oil temperature will be much better
regulated and the effect will off-set quick overheating of oil temps during
continued full power operation.
However, eventually said regulation can be overcome, and eventually oil temps can
climb into the red. Personal experience has shown that the time to overtemp
is increased with this device.
The downside is that it can be a failure item with obvious consequences.
However it is spelled.
________________________________
From: owner-yak-list-server@matronics.com [owner-yak-list-server@matronics.com]
on behalf of Ernest Martinez [erniel29@gmail.com]
Sent: Wednesday, July 20, 2016 9:30 PM
Subject: [Non-DoD Source] Re: Yak-List: Multigrade oils
I think you mean a vernatherm.
On Wednesday, July 20, 2016, Bitterlich, Mark G CIV NAVAIR, WD <mark.bitterlich@navy.mil<mailto:mark.bitterlich@navy.mil>> wrote:
Mark, you used the term "thermister" when I think you meant something called a
"veritherm". Are you sure your oil cooler actually has one? It is pretty easy
to tell on a regular day with normal temps. Watch your oil temp. As the engine
runs during your warmup, does the oil temp climb slowly into the green?
Or does it sit there with oil temps all the way to the left, and then ... more
or less... climb quickly into the green, and then DROP back down into the yellow?
If the former, you have no veritherm in the oil cooler. If the latter, you
probably do.
A lot has been said about pre-heating the engine, and NOT pre-heating the oil cooler.
Without a veritherm, the consensus is that when you start the engine,
even with pre-heated oil in the oil tank, and even with a pre-heated sump, there
is the possibility of a big slug of cold oil sitting in the oil cooler and
then being pumped into the engine. Lots of "oh crap" stories ensue. I have no
knowledge of this happen, but several folks swear that it has, so there you
go.
With the veriterm installed in the oil cooler, oil is BY-PASSED past the oil cooler.
No big slug of cold oil. As the oil temp comes up, the veritherm opens...
SLOWLY and that slug of cold oil is more or less "carefully" added to the
warm oil already in the engine. Exactly as your thermostat in your car works.
I mean EXACTLY.
So it is kind of important to know whether your oil cooler has a a veritherm (thermostate)
or not.
Mark
p.s. Most 50's, 52's and 55's, and Sukes, came without one.
________________________________
From: owner-yak-list-server@matronics.com<thismessage:/> [owner-yak-list-server@matronics.com<thismessage:/>]
on behalf of Mark Davis [markdavis@wbsnet.org<thismessage:/>]
Sent: Wednesday, July 20, 2016 10:49 AM
Subject: [Non-DoD Source] RE: Yak-List: Multigrade oils
Thanks Richard. I always appreciate your time to answer questions!
Mark Davis
N44YK
From: owner-yak-list-server@matronics.com<thismessage:/> [mailto:owner-yak-list-server@matronics.com<thismessage:/>] On Behalf Of Richard Goode
Sent: Wednesday, July 20, 2016 4:21 AM
Subject: RE: Yak-List: Multigrade oils
Russian say that any start below +5C should have a degree of preheat.
I understand your concern about the fuel, but my gut feeling is that it is not
a serious concern. Firstly, I don't think that the fuel is going to expand significantly,
but if you are concerned, it would be easy to put a small plastic
tube onto the tank overflow and guide any fuel well away from the heat.
I understand your issue about the oil cooler, but again if you heat cooler and
engine and oil tank, and your ambient temperature is at least minus 5C, then I'm
sure you won't have a problem. Anything much below that, then I think you need
to have the aircraft in a hangar to do the job properly. However, I have seen
Russians starting these engines at -25C (and outside!), but using big hot
air burners, so they clearly are not worried about fire!
I don't know what Shell themselves recommend, but personally I would go to 120
at over 30 C ambient.
I have never heard of anyone in Europe using MMO, which is not to say it doesn't
work!
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com<http://www.russianaeros.com/><http://www.russianaeros.com/>
From: owner-yak-list-server@matronics.com<thismessage:/><mailto:owner-yak-list-server@matronics.com<thismessage:/>> [mailto:owner-yak-list-server@matronics.com<thismessage:/>] On Behalf Of Mark Davis
Sent: 19 July 2016 21:57
Subject: RE: Yak-List: Multigrade oils
Richard,
My YAK is in an unheated hangar and I do occasionally fly in temps as low
at 35 degrees. Engine heat is easy at home base, but warming the oil cooler
excessively concerns me as some of the heat will rise up into the fuel tank area
and potentially cause expansion on a full tank of cold fuel which could lead
to venting, putting fuel near the electric heat source. I've been told that
straight weight oils can cause issues when the thermister opens the first time
and the engine tries to push the cold oil to the engine. Any comments on that?
Also, what is your general guideline temperature on when to switch from 100
to 120 Aeroshell? I really would prefer to be running the straight weight
oils, but have avoided them as I occasionally take my YAK to Colorado up in the
mountains where overnight temperatures can drop below freezing in the spring
and fall. Less leaks would be nice.
As to Jill's comment on adding MMO to Phillips XC 25W60, I had exhaust valve
issues three years in a row, one resulting in replacing a jug while running
straight XC 25W60. Jill suggested adding MMO to the Phillips and I haven't had
an issue since beginning that practice five years ago. As they say, you mileage
may vary.
Mark Davis
N44YK
From: owner-yak-list-server@matronics.com<thismessage:/><mailto:owner-yak-list-server@matronics.com<thismessage:/>> [mailto:owner-yak-list-server@matronics.com<thismessage:/>] On Behalf Of Richard Goode
Sent: Tuesday, July 19, 2016 9:49 AM
Subject: Yak-List: Multigrade oils
These engines were never designed to use oils that are as thin as the multigrades,
which is why they do leak oil when multigrade are used. Also, the advantages
are relatively small, unless you are operating in very cold temperatures, when,
in any case you should pre-heat. But, compared to automotive use, cold starts
are relatively infrequent.
Another issue that is often ignored is that these engines can corrode badly (particularly
in the cylinders) if left without being run frequently. Indeed the
official Russian documentation says that the engines should have short-term conservation
if not used every week! From this point of view, as someone else has
remarked, Aeroshell plus is very good because it has specific anti-corrosion
additives.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com<http://www.russianaeros.com/><http://www.russianaeros.com/>
--
This message has been scanned for viruses and
dangerous content by MailScanner<http://www.mailscanner.info/>, and is
believed to be clean.
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List" target="_blank">http://www.matronics.com/Navigator?Yak-List
==========
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_blank">http://forums.matronics.com
==========
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Message 13
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Then it is likely that you have this device in your oil cooler. :-)
Mark
p.s. Screw the term, I got your meaning.
________________________________
From: owner-yak-list-server@matronics.com [owner-yak-list-server@matronics.com]
on behalf of Mark Davis [markdavis@wbsnet.org]
Sent: Wednesday, July 20, 2016 9:50 PM
Subject: Re: [Non-DoD Source] RE: Yak-List: Multigrade oils
Mark, maybe I used the wrong term, but the oil temp comes up into band and then
drops out of band low the first time it opens. It doesn't appear to be gradual
at all. It typically happens during engine run up. It's noticeable and I wait
for it to open and warm back up before I add takeoff power. I use a restrictor
plate on the oil cooler inlet for cold weather. Once the initial slug of
cold oil is circulated the oil temp stays stable as regulated by air flow over
the cylinders and through the oil cooler.
Mark Davis
N44YK
Sent from my iPhone
> On Jul 20, 2016, at 7:11 PM, Bitterlich, Mark G CIV NAVAIR, WD <mark.bitterlich@navy.mil>
wrote:
>
>
> Mark, you used the term "thermister" when I think you meant something called
a "veritherm". Are you sure your oil cooler actually has one? It is pretty easy
to tell on a regular day with normal temps. Watch your oil temp. As the engine
runs during your warmup, does the oil temp climb slowly into the green?
>
>
> Or does it sit there with oil temps all the way to the left, and then ... more
or less... climb quickly into the green, and then DROP back down into the yellow?
If the former, you have no veritherm in the oil cooler. If the latter,
you probably do.
>
>
> A lot has been said about pre-heating the engine, and NOT pre-heating the oil
cooler. Without a veritherm, the consensus is that when you start the engine,
even with pre-heated oil in the oil tank, and even with a pre-heated sump, there
is the possibility of a big slug of cold oil sitting in the oil cooler and
then being pumped into the engine. Lots of "oh crap" stories ensue. I have
no knowledge of this happen, but several folks swear that it has, so there you
go.
>
>
> With the veriterm installed in the oil cooler, oil is BY-PASSED past the oil
cooler. No big slug of cold oil. As the oil temp comes up, the veritherm opens...
SLOWLY and that slug of cold oil is more or less "carefully" added to the
warm oil already in the engine. Exactly as your thermostat in your car works.
I mean EXACTLY.
>
>
> So it is kind of important to know whether your oil cooler has a a veritherm
(thermostate) or not.
>
>
> Mark
>
>
> p.s. Most 50's, 52's and 55's, and Sukes, came without one.
>
>
> ________________________________
> From: owner-yak-list-server@matronics.com [owner-yak-list-server@matronics.com]
on behalf of Mark Davis [markdavis@wbsnet.org]
> Sent: Wednesday, July 20, 2016 10:49 AM
> To: yak-list@matronics.com
> Subject: [Non-DoD Source] RE: Yak-List: Multigrade oils
>
> Thanks Richard. I always appreciate your time to answer questions!
>
> Mark Davis
> N44YK
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
> Sent: Wednesday, July 20, 2016 4:21 AM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: Multigrade oils
>
> Russian say that any start below +5C should have a degree of preheat.
>
> I understand your concern about the fuel, but my gut feeling is that it is not
a serious concern. Firstly, I don't think that the fuel is going to expand significantly,
but if you are concerned, it would be easy to put a small plastic
tube onto the tank overflow and guide any fuel well away from the heat.
>
> I understand your issue about the oil cooler, but again if you heat cooler and
engine and oil tank, and your ambient temperature is at least minus 5C, then
I'm sure you won't have a problem. Anything much below that, then I think you
need to have the aircraft in a hangar to do the job properly. However, I have
seen Russians starting these engines at -25C (and outside!), but using big hot
air burners, so they clearly are not worried about fire!
>
> I don't know what Shell themselves recommend, but personally I would go to 120
at over 30 C ambient.
>
> I have never heard of anyone in Europe using MMO, which is not to say it doesn't
work!
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com<http://www.russianaeros.com/<http://www.russianaeros.com%3chttp//www.russianaeros.com/>>
>
> From: owner-yak-list-server@matronics.com<mailto:owner-yak-list-server@matronics.com> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Davis
> Sent: 19 July 2016 21:57
> To: yak-list@matronics.com<mailto:yak-list@matronics.com>
> Subject: RE: Yak-List: Multigrade oils
>
> Richard,
> My YAK is in an unheated hangar and I do occasionally fly in temps as low
at 35 degrees. Engine heat is easy at home base, but warming the oil cooler
excessively concerns me as some of the heat will rise up into the fuel tank area
and potentially cause expansion on a full tank of cold fuel which could lead
to venting, putting fuel near the electric heat source. I've been told that
straight weight oils can cause issues when the thermister opens the first time
and the engine tries to push the cold oil to the engine. Any comments on that?
Also, what is your general guideline temperature on when to switch from
100 to 120 Aeroshell? I really would prefer to be running the straight weight
oils, but have avoided them as I occasionally take my YAK to Colorado up in the
mountains where overnight temperatures can drop below freezing in the spring
and fall. Less leaks would be nice.
>
> As to Jill's comment on adding MMO to Phillips XC 25W60, I had exhaust valve
issues three years in a row, one resulting in replacing a jug while running
straight XC 25W60. Jill suggested adding MMO to the Phillips and I haven't
had an issue since beginning that practice five years ago. As they say, you mileage
may vary.
>
> Mark Davis
> N44YK
>
>
> From: owner-yak-list-server@matronics.com<mailto:owner-yak-list-server@matronics.com> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
> Sent: Tuesday, July 19, 2016 9:49 AM
> To: yak-list@matronics.com<mailto:yak-list@matronics.com>
> Subject: Yak-List: Multigrade oils
>
> These engines were never designed to use oils that are as thin as the multigrades,
which is why they do leak oil when multigrade are used. Also, the advantages
are relatively small, unless you are operating in very cold temperatures,
when, in any case you should pre-heat. But, compared to automotive use, cold
starts are relatively infrequent.
>
> Another issue that is often ignored is that these engines can corrode badly (particularly
in the cylinders) if left without being run frequently. Indeed the
official Russian documentation says that the engines should have short-term
conservation if not used every week! From this point of view, as someone else
has remarked, Aeroshell plus is very good because it has specific anti-corrosion
additives.
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com<http://www.russianaeros.com/<http://www.russianaeros.com%3chttp//www.russianaeros.com/>>
>
>
> --
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>
>
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