Today's Message Index:
----------------------
1. 12:38 AM - Re: Over- priming (Richard Goode)
2. 06:11 AM - Re: Over- priming (Roger Kemp M.D.)
3. 07:26 AM - Re: Over- priming (Jan Mevis)
4. 08:34 AM - Spray paint (CJcanuck)
5. 08:48 AM - Re: Spray paint (doug sapp)
6. 12:41 PM - Re: Over- priming (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
7. 12:53 PM - Re: Over- priming (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
8. 08:22 PM - Re: Over- priming (Roger Kemp M.D.)
9. 08:24 PM - Re: Over- priming (Roger Kemp M.D.)
Message 1
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| Subject: | Re: Over- priming |
I don't think that it would affect priming but it does increase the
susceptiblity of the tail-wheel planes to hydraulic-lock,since the oil
can pool more easily in the intake tubes.
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
----- Original Message -----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
To: yak-list@matronics.com
Sent: Tuesday, September 29, 2009 11:17 PM
Subject: RE: Yak-List: Over- priming
Point, MALS-14 64E" <mark.bitterlich@navy.mil>
This may be a ridiculous statement, but it dawns on me that not all of
these engines sit at the same angle when mounted in the aircraft. For
example, the YAK-50 obviously sits canted back, while on the 52 it is
fairly level. Would this result in less fuel going down into the top
cylinder or not? Just wondering.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug sapp
Sent: Tuesday, September 29, 2009 10:14
To: yak-list@matronics.com
Subject: Re: Yak-List: Over- priming
All,
During a conversation with the folks in China who are in the know with
respect to what is done to their engines at overhaul stated that it is
the top clys which are always in the poorest condition when they
receive
the engines for overhaul. They confirmed that this was due to
overpriming. All food for thought.
Doug
On Tue, Sep 29, 2009 at 2:17 AM, Richard Goode
<richard.goode@russianaeros.com> wrote:
In my view ten blades are not enough - I would suggest at least
fifteen.
The point of my method is that it prevents the need of getting
in and out of the aircraft, which one really does not want to do at
the
best of times particularly if it is cold/raining.
So if the engine is in reasonable condition; the carburettor
primed; 3/5 pumps to the cylinder, the engine should start within a
revolution of the prop on every occasion.
The big mistake is to treat the air start as a form of
starter-motor.
The engine will either start, which is fine; kick-back, which
means it is over-primed; or not fire which means that it is under
primed.
IF it does kick-back then switch everything off; and now you do
need to get out, and wind the prop through (say) six revolutions, and
then start again.
If it is under primed, then give it some more prime.
The essence of it is that everything can be done from inside the
cockpit.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340 120
Fax: +44 (0) 1544 340 129
www.russianaeros.com
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
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For the 50's, I jack my tail up about 2 feet with a standard hydraulic floor
jack if she is going to sit for a few days. Doing that does increase the oil
drainage out of the intake drains . I have found I have less oil draining
out of the intakes during pull through doing this.
The next item on the agenda is to install a sump drain line to plug into a
"clean container" for drainage when she is going to sit for period of time.
Viperdoc
YAK 50 N78YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Wednesday, September 30, 2009 2:29 AM
Subject: Re: Yak-List: Over- priming
I don't think that it would affect priming but it does increase the
susceptiblity of the tail-wheel planes to hydraulic-lock,since the oil can
pool more easily in the intake tubes.
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
----- Original Message -----
From: Bitterlich, Mark G CIV Det Cherry Point,
<mailto:mark.bitterlich@navy.mil> MALS-14 64E
Sent: Tuesday, September 29, 2009 11:17 PM
Subject: RE: Yak-List: Over- priming
MALS-14 64E" <mark.bitterlich@navy.mil>
This may be a ridiculous statement, but it dawns on me that not all of
these engines sit at the same angle when mounted in the aircraft. For
example, the YAK-50 obviously sits canted back, while on the 52 it is
fairly level. Would this result in less fuel going down into the top
cylinder or not? Just wondering.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug sapp
Sent: Tuesday, September 29, 2009 10:14
Subject: Re: Yak-List: Over- priming
All,
During a conversation with the folks in China who are in the know with
respect to what is done to their engines at overhaul stated that it is
the top clys which are always in the poorest condition when they receive
the engines for overhaul. They confirmed that this was due to
overpriming. All food for thought.
Doug
On Tue, Sep 29, 2009 at 2:17 AM, Richard Goode
<richard.goode@russianaeros.com> wrote:
In my view ten blades are not enough - I would suggest at least
fifteen.
The point of my method is that it prevents the need of getting
in and out of the aircraft, which one really does not want to do at the
best of times particularly if it is cold/raining.
So if the engine is in reasonable condition; the carburettor
primed; 3/5 pumps to the cylinder, the engine should start within a
revolution of the prop on every occasion.
The big mistake is to treat the air start as a form of
starter-motor.
The engine will either start, which is fine; kick-back, which
means it is over-primed; or not fire which means that it is under
primed.
IF it does kick-back then switch everything off; and now you do
need to get out, and wind the prop through (say) six revolutions, and
then start again.
If it is under primed, then give it some more prime.
The essence of it is that everything can be done from inside the
cockpit.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340 120
Fax: +44 (0) 1544 340 129
www.russianaeros.com
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax p; Navigator Photoshare, and
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics====
===================<; via the Web
href="http://forums.matronics.com">http://forums.matronics.com
_p; generous bsp;
href="http://www.matronics.com/contribution">http://www.matronics.com/c====
===========
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Very good idea, I'll try that too.
Jan
YK50 RA2005K
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp M.D.
Sent: woensdag 30 september 2009 15:09
Subject: RE: Yak-List: Over- priming
For the 50's, I jack my tail up about 2 feet with a standard hydraulic floor
jack if she is going to sit for a few days. Doing that does increase the oil
drainage out of the intake drains . I have found I have less oil draining
out of the intakes during pull through doing this.
The next item on the agenda is to install a sump drain line to plug into a
"clean container" for drainage when she is going to sit for period of time.
Viperdoc
YAK 50 N78YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Wednesday, September 30, 2009 2:29 AM
Subject: Re: Yak-List: Over- priming
I don't think that it would affect priming but it does increase the
susceptiblity of the tail-wheel planes to hydraulic-lock,since the oil can
pool more easily in the intake tubes.
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
----- Original Message -----
From: Bitterlich, <mailto:mark.bitterlich@navy.mil> Mark G CIV Det Cherry
Point, MALS-14 64E
Sent: Tuesday, September 29, 2009 11:17 PM
Subject: RE: Yak-List: Over- priming
MALS-14 64E" <mark.bitterlich@navy.mil>
This may be a ridiculous statement, but it dawns on me that not all of
these engines sit at the same angle when mounted in the aircraft. For
example, the YAK-50 obviously sits canted back, while on the 52 it is
fairly level. Would this result in less fuel going down into the top
cylinder or not? Just wondering.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug sapp
Sent: Tuesday, September 29, 2009 10:14
Subject: Re: Yak-List: Over- priming
All,
During a conversation with the folks in China who are in the know with
respect to what is done to their engines at overhaul stated that it is
the top clys which are always in the poorest condition when they receive
the engines for overhaul. They confirmed that this was due to
overpriming. All food for thought.
Doug
On Tue, Sep 29, 2009 at 2:17 AM, Richard Goode
<richard.goode@russianaeros.com> wrote:
In my view ten blades are not enough - I would suggest at least
fifteen.
The point of my method is that it prevents the need of getting
in and out of the aircraft, which one really does not want to do at the
best of times particularly if it is cold/raining.
So if the engine is in reasonable condition; the carburettor
primed; 3/5 pumps to the cylinder, the engine should start within a
revolution of the prop on every occasion.
The big mistake is to treat the air start as a form of
starter-motor.
The engine will either start, which is fine; kick-back, which
means it is over-primed; or not fire which means that it is under
primed.
IF it does kick-back then switch everything off; and now you do
need to get out, and wind the prop through (say) six revolutions, and
then start again.
If it is under primed, then give it some more prime.
The essence of it is that everything can be done from inside the
cockpit.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340 120
Fax: +44 (0) 1544 340 129
www.russianaeros.com
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax p; Navigator Photoshare, and
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics====
===================<; via the Web
href="http://forums.matronics.com">http://forums.matronics.com
_p; generous bsp;
href="http://www.matronics.com/contribution">http://www.matronics.com/c====
===========
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http://www.matronics.com/contribution
Message 4
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Hey all,
Anyone know where I can get a small can (preferably spray) of the grass green chinese
paint, or equivalent?
Thanks!
Mike
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=265721#265721
Message 5
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Most good automotive paint stores have the capacity to mix paints and put
them in a pressurized spray can for you. Our local Omak Car Quest parts
store offers this service.
Doug
On Wed, Sep 30, 2009 at 8:34 AM, CJcanuck <m_kirk69@hotmail.com> wrote:
>
> Hey all,
>
> Anyone know where I can get a small can (preferably spray) of the grass
> green chinese paint, or equivalent?
>
> Thanks!
>
> Mike
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=265721#265721
>
>
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
Message 6
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Some folks run a line from the sump drain to an electric pump and then
pump the oil directly back to the main tank. Works pretty good. But,
the way they attach this to the sump point scares me a little. It's
FRAGILE. If that were to break, all your engine oil would run right out
of it, and you would never know it was happening in flight.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
M.D.
Sent: Wednesday, September 30, 2009 6:09
Subject: RE: Yak-List: Over- priming
For the 50's, I jack my tail up about 2 feet with a standard hydraulic
floor jack if she is going to sit for a few days. Doing that does
increase the oil drainage out of the intake drains . I have found I have
less oil draining out of the intakes during pull through doing this.
The next item on the agenda is to install a sump drain line to plug into
a "clean container" for drainage when she is going to sit for period of
time.
Viperdoc
YAK 50 N78YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Wednesday, September 30, 2009 2:29 AM
Subject: Re: Yak-List: Over- priming
I don't think that it would affect priming but it does increase the
susceptiblity of the tail-wheel planes to hydraulic-lock,since the oil
can pool more easily in the intake tubes.
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
----- Original Message -----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
<mailto:mark.bitterlich@navy.mil>
To: yak-list@matronics.com
Sent: Tuesday, September 29, 2009 11:17 PM
Subject: RE: Yak-List: Over- priming
Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil>
This may be a ridiculous statement, but it dawns on me that not
all of
these engines sit at the same angle when mounted in the
aircraft. For
example, the YAK-50 obviously sits canted back, while on the 52
it is
fairly level. Would this result in less fuel going down into
the top
cylinder or not? Just wondering.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug
sapp
Sent: Tuesday, September 29, 2009 10:14
To: yak-list@matronics.com
Subject: Re: Yak-List: Over- priming
All,
During a conversation with the folks in China who are in the
know with
respect to what is done to their engines at overhaul stated that
it is
the top clys which are always in the poorest condition when they
receive
the engines for overhaul. They confirmed that this was due to
overpriming. All food for thought.
Doug
On Tue, Sep 29, 2009 at 2:17 AM, Richard Goode
<richard.goode@russianaeros.com> wrote:
In my view ten blades are not enough - I would suggest at least
fifteen.
The point of my method is that it prevents the need of getting
in and out of the aircraft, which one really does not want to do
at the
best of times particularly if it is cold/raining.
So if the engine is in reasonable condition; the carburettor
primed; 3/5 pumps to the cylinder, the engine should start
within a
revolution of the prop on every occasion.
The big mistake is to treat the air start as a form of
starter-motor.
The engine will either start, which is fine; kick-back, which
means it is over-primed; or not fire which means that it is
under
primed.
IF it does kick-back then switch everything off; and now you do
need to get out, and wind the prop through (say) six
revolutions, and
then start again.
If it is under primed, then give it some more prime.
The essence of it is that everything can be done from inside the
cockpit.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340 120
Fax: +44 (0) 1544 340 129
www.russianaeros.com
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax p; Navigator Photoshare, and
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
=======================<; via the Web
href="http://forums.matronics.com">http://forums.matronics.com
_p; generous bsp;
href="http://www.matronics.com/contribution">http://www.matronics.com/c
===============
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http://www.matronics.com/contribution
Message 7
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If you have intake drains, is it not better to let the oil flow out of
the cylinders, into the intakes and then out the drain? Is it better to
try and contain the oil in the cylinder....?? I don't quite get why
keeping the engine level would INCREASE the oil out of the intake
drains. What is the logic behind that? No M-14 equipped tail wheel
airplane that I know of EVER jacks their plane up to keep it level that
I know of Doc. Where did you come up with that?
On the other hand, if you keep the engine level, more of the oil will
stay in the cylinder, decreasing the oil coming out of the intake drain
(as you said) when you pull it through, but INCREASING the amount of oil
coming out the exhaust, and increasing the chance of hydraulic lock.
I must be missing something here. Not disagreeing, I just don't get it.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, September 30, 2009 7:21
Subject: RE: Yak-List: Over- priming
Very good idea, I'll try that too.
Jan
YK50 RA2005K
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
M.D.
Sent: woensdag 30 september 2009 15:09
Subject: RE: Yak-List: Over- priming
For the 50's, I jack my tail up about 2 feet with a standard hydraulic
floor jack if she is going to sit for a few days. Doing that does
increase the oil drainage out of the intake drains . I have found I have
less oil draining out of the intakes during pull through doing this.
The next item on the agenda is to install a sump drain line to plug into
a "clean container" for drainage when she is going to sit for period of
time.
Viperdoc
YAK 50 N78YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Wednesday, September 30, 2009 2:29 AM
Subject: Re: Yak-List: Over- priming
I don't think that it would affect priming but it does increase the
susceptiblity of the tail-wheel planes to hydraulic-lock,since the oil
can pool more easily in the intake tubes.
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
----- Original Message -----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
<mailto:mark.bitterlich@navy.mil>
To: yak-list@matronics.com
Sent: Tuesday, September 29, 2009 11:17 PM
Subject: RE: Yak-List: Over- priming
Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil>
This may be a ridiculous statement, but it dawns on me that not
all of
these engines sit at the same angle when mounted in the
aircraft. For
example, the YAK-50 obviously sits canted back, while on the 52
it is
fairly level. Would this result in less fuel going down into
the top
cylinder or not? Just wondering.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug
sapp
Sent: Tuesday, September 29, 2009 10:14
To: yak-list@matronics.com
Subject: Re: Yak-List: Over- priming
All,
During a conversation with the folks in China who are in the
know with
respect to what is done to their engines at overhaul stated that
it is
the top clys which are always in the poorest condition when they
receive
the engines for overhaul. They confirmed that this was due to
overpriming. All food for thought.
Doug
On Tue, Sep 29, 2009 at 2:17 AM, Richard Goode
<richard.goode@russianaeros.com> wrote:
In my view ten blades are not enough - I would suggest at least
fifteen.
The point of my method is that it prevents the need of getting
in and out of the aircraft, which one really does not want to do
at the
best of times particularly if it is cold/raining.
So if the engine is in reasonable condition; the carburettor
primed; 3/5 pumps to the cylinder, the engine should start
within a
revolution of the prop on every occasion.
The big mistake is to treat the air start as a form of
starter-motor.
The engine will either start, which is fine; kick-back, which
means it is over-primed; or not fire which means that it is
under
primed.
IF it does kick-back then switch everything off; and now you do
need to get out, and wind the prop through (say) six
revolutions, and
then start again.
If it is under primed, then give it some more prime.
The essence of it is that everything can be done from inside the
cockpit.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340 120
Fax: +44 (0) 1544 340 129
www.russianaeros.com
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax p; Navigator Photoshare, and
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
=======================<; via the Web
href="http://forums.matronics.com">http://forums.matronics.com
_p; generous bsp;
href="http://www.matronics.com/contribution">http://www.matronics.com/c
===============
-----------------------------------------------
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dangerous content by the Invictawiz MailScanner
and is believed to be clean.
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http://forums.matronics.com
http://www.matronics.com/contribution
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Mark,
Instead of the nose sitting at 13.4 deg, the angle is decreased to
approximately 8-9 degrees with the jack under the tail. The plane is not
level with this system. I came up with the idea when I pulled blades on
morning after the palne had been sitting for a couple of weeks. When I
pulled 14 blades, I got a fair amount oil out then just as I ready to close
the drain, another few globules of oil began to floe.
Since I have been doing this, I seldom have a problem with the continued
drainage of oil since that time.
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: Wednesday, September 30, 2009 2:51 PM
Subject: RE: Yak-List: Over- priming
MALS-14 64E" <mark.bitterlich@navy.mil>
If you have intake drains, is it not better to let the oil flow out of
the cylinders, into the intakes and then out the drain? Is it better to
try and contain the oil in the cylinder....?? I don't quite get why
keeping the engine level would INCREASE the oil out of the intake
drains. What is the logic behind that? No M-14 equipped tail wheel
airplane that I know of EVER jacks their plane up to keep it level that
I know of Doc. Where did you come up with that?
On the other hand, if you keep the engine level, more of the oil will
stay in the cylinder, decreasing the oil coming out of the intake drain
(as you said) when you pull it through, but INCREASING the amount of oil
coming out the exhaust, and increasing the chance of hydraulic lock.
I must be missing something here. Not disagreeing, I just don't get it.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, September 30, 2009 7:21
Subject: RE: Yak-List: Over- priming
Very good idea, I'll try that too.
Jan
YK50 RA2005K
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
M.D.
Sent: woensdag 30 september 2009 15:09
Subject: RE: Yak-List: Over- priming
For the 50's, I jack my tail up about 2 feet with a standard hydraulic
floor jack if she is going to sit for a few days. Doing that does
increase the oil drainage out of the intake drains . I have found I have
less oil draining out of the intakes during pull through doing this.
The next item on the agenda is to install a sump drain line to plug into
a "clean container" for drainage when she is going to sit for period of
time.
Viperdoc
YAK 50 N78YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Wednesday, September 30, 2009 2:29 AM
Subject: Re: Yak-List: Over- priming
I don't think that it would affect priming but it does increase the
susceptiblity of the tail-wheel planes to hydraulic-lock,since the oil
can pool more easily in the intake tubes.
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
----- Original Message -----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
<mailto:mark.bitterlich@navy.mil>
To: yak-list@matronics.com
Sent: Tuesday, September 29, 2009 11:17 PM
Subject: RE: Yak-List: Over- priming
Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil>
This may be a ridiculous statement, but it dawns on me that not
all of
these engines sit at the same angle when mounted in the
aircraft. For
example, the YAK-50 obviously sits canted back, while on the 52
it is
fairly level. Would this result in less fuel going down into
the top
cylinder or not? Just wondering.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug
sapp
Sent: Tuesday, September 29, 2009 10:14
To: yak-list@matronics.com
Subject: Re: Yak-List: Over- priming
All,
During a conversation with the folks in China who are in the
know with
respect to what is done to their engines at overhaul stated that
it is
the top clys which are always in the poorest condition when they
receive
the engines for overhaul. They confirmed that this was due to
overpriming. All food for thought.
Doug
On Tue, Sep 29, 2009 at 2:17 AM, Richard Goode
<richard.goode@russianaeros.com> wrote:
In my view ten blades are not enough - I would suggest at least
fifteen.
The point of my method is that it prevents the need of getting
in and out of the aircraft, which one really does not want to do
at the
best of times particularly if it is cold/raining.
So if the engine is in reasonable condition; the carburettor
primed; 3/5 pumps to the cylinder, the engine should start
within a
revolution of the prop on every occasion.
The big mistake is to treat the air start as a form of
starter-motor.
The engine will either start, which is fine; kick-back, which
means it is over-primed; or not fire which means that it is
under
primed.
IF it does kick-back then switch everything off; and now you do
need to get out, and wind the prop through (say) six
revolutions, and
then start again.
If it is under primed, then give it some more prime.
The essence of it is that everything can be done from inside the
cockpit.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340 120
Fax: +44 (0) 1544 340 129
www.russianaeros.com
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax p; Navigator Photoshare, and
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
=======================<; via the Web
href="http://forums.matronics.com">http://forums.matronics.com
_p; generous bsp;
href="http://www.matronics.com/contribution">http://www.matronics.com/c
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Message 9
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This system would require the closure of the sump drain prior to T.O.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: Wednesday, September 30, 2009 2:40 PM
Subject: RE: Yak-List: Over- priming
MALS-14 64E" <mark.bitterlich@navy.mil>
Some folks run a line from the sump drain to an electric pump and then
pump the oil directly back to the main tank. Works pretty good. But,
the way they attach this to the sump point scares me a little. It's
FRAGILE. If that were to break, all your engine oil would run right out
of it, and you would never know it was happening in flight.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
M.D.
Sent: Wednesday, September 30, 2009 6:09
Subject: RE: Yak-List: Over- priming
For the 50's, I jack my tail up about 2 feet with a standard hydraulic
floor jack if she is going to sit for a few days. Doing that does
increase the oil drainage out of the intake drains . I have found I have
less oil draining out of the intakes during pull through doing this.
The next item on the agenda is to install a sump drain line to plug into
a "clean container" for drainage when she is going to sit for period of
time.
Viperdoc
YAK 50 N78YK
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Wednesday, September 30, 2009 2:29 AM
Subject: Re: Yak-List: Over- priming
I don't think that it would affect priming but it does increase the
susceptiblity of the tail-wheel planes to hydraulic-lock,since the oil
can pool more easily in the intake tubes.
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
----- Original Message -----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
<mailto:mark.bitterlich@navy.mil>
To: yak-list@matronics.com
Sent: Tuesday, September 29, 2009 11:17 PM
Subject: RE: Yak-List: Over- priming
Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil>
This may be a ridiculous statement, but it dawns on me that not
all of
these engines sit at the same angle when mounted in the
aircraft. For
example, the YAK-50 obviously sits canted back, while on the 52
it is
fairly level. Would this result in less fuel going down into
the top
cylinder or not? Just wondering.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug
sapp
Sent: Tuesday, September 29, 2009 10:14
To: yak-list@matronics.com
Subject: Re: Yak-List: Over- priming
All,
During a conversation with the folks in China who are in the
know with
respect to what is done to their engines at overhaul stated that
it is
the top clys which are always in the poorest condition when they
receive
the engines for overhaul. They confirmed that this was due to
overpriming. All food for thought.
Doug
On Tue, Sep 29, 2009 at 2:17 AM, Richard Goode
<richard.goode@russianaeros.com> wrote:
In my view ten blades are not enough - I would suggest at least
fifteen.
The point of my method is that it prevents the need of getting
in and out of the aircraft, which one really does not want to do
at the
best of times particularly if it is cold/raining.
So if the engine is in reasonable condition; the carburettor
primed; 3/5 pumps to the cylinder, the engine should start
within a
revolution of the prop on every occasion.
The big mistake is to treat the air start as a form of
starter-motor.
The engine will either start, which is fine; kick-back, which
means it is over-primed; or not fire which means that it is
under
primed.
IF it does kick-back then switch everything off; and now you do
need to get out, and wind the prop through (say) six
revolutions, and
then start again.
If it is under primed, then give it some more prime.
The essence of it is that everything can be done from inside the
cockpit.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340 120
Fax: +44 (0) 1544 340 129
www.russianaeros.com
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax p; Navigator Photoshare, and
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
=======================<; via the Web
href="http://forums.matronics.com">http://forums.matronics.com
_p; generous bsp;
href="http://www.matronics.com/contribution">http://www.matronics.com/c
===============
-----------------------------------------------
This message has been scanned for viruses and
dangerous content by the Invictawiz MailScanner
and is believed to be clean.
http://www.invictawiz.com
-----------------------------------------------
http://www.matronics.com/Navigator?Yak-List
http://forums.matronics.com
http://www.matronics.com/contribution
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