Today's Message Index:
----------------------
1. 07:22 AM - Re: Over-priming (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
2. 07:49 AM - Re: Over-priming (Richard Goode)
3. 08:54 AM - Re: Over-priming (pilko2)
4. 10:39 AM - Re: Over-priming (Roger Kemp M.D.)
5. 07:19 PM - Frosty's Yak 50 for sale????? (Mark Schrick)
Message 1
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Strange as it may seem... On the YAK-52 you turn it to the right to
prime the engine, on my YAK-50, you turn it to the LEFT to prime the
engine. It all gets very confusing. I've always kind of wondered if it
is just MY 50 that is backwards from everyone else!
Doc? Tom?
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
Savarese
Sent: Friday, September 18, 2009 20:21
Subject: Re: Yak-List: Over-priming
Yes, that is correct Terry. The Yak uses the primer pump for both
functions: pressurize the fuel system by rotating the primer pump to the
left and pumping until adequate fuel pressure can be seen on the fuel
pressure gauge. Turning the primer pump to the right and pumping primes
the engine.
On the CJ, the wobble pump performs the same function as turning the
Yak's primer pump to the left and pumping - pressurizing the fuel
system. The CJ's primer pump on the right console is identical to the
Yak primer pump turned to the right. On the CJ, this primer pump can be
turned to the left or right to prime the engine. Whereas on the Yak it
must be turned to the right to prime the engine.
Dennis
----- Original Message -----
From: Terry Calloway <mailto:terrycalloway@mac.com>
To: yak-list@matronics.com
Sent: Friday, September 18, 2009 10:21 AM
Subject: Re: Yak-List: Over-priming
There is a difference in the Yak and CJ primers. Can someone
offer additional discussion on priming an M-14 installed on the CJ? I
believe the Yak primer is also the wobble pump which is the difference
in Cylinder and Line which you mention. Is this correct?
Thanks;
tc
On Sep 18, 2009, at 9:19 AM, Richard Goode wrote:
There seem to be a lot of methods for priming - by
definition, they cannot all be correct. It does help to understand how
the system works:
There are two positions on the priming pump:
* Cylinder, and line (sometimes also written as
system).
* Excessive priming into the cylinder will
over-prime, and that can have serious effects!
* Priming into line / system is simply priming the
carburettor and building up fuel pressure. You can do this all day,
and excess fuel simply returns back from the carburettor.
* The Russian manuals are misleading in that they
are all geared to having an external engineer to turn the propeller.
Of course this is fine if you have such a person, but most of us do not,
and it really is most inconvenient to keep hoping in and out of the
cockpit, and quite simply, it is not necessary.
So the correct procedure is:
* Turn the prop at least 10 complete revolutions
to avoid hydraulic-lock.
* In the aeroplane, select line/system, and pump a
good number of times. I say a number of times, simply because in hot
weather etc you can get air in the system, and given that it does not
matter if you over-prime on line/system, you want to make sure that each
pump is totally fuel and not air before priming onto cylinder.
* Prime onto cylinder - between 3 and 5 primes is
all you need. More than 5 and you are almost certainly over- priming.
* Check that you still have good fuel pressure
from the priming to line/system; if not, a couple more pumps on the
line/system to build it up.
* Set throttle.
* Start with magnetos off, and then on when it
fires.
* Having left the primer out, but on the cylinder
side, as soon as if fires give it one pump - possibly more in cold
weather, but again no more than that.
* Keep the engine running on the throttle.
* Lock primer.
Of course if you have someone outside to turn the prop
through 2/3 revolutions while the cylinders are being primed, this is
helpful, but not necessary.
IF however air is low, then it is worth while sucking in
while priming, or if by your self (having checked everything is off)
having primed on cylinder then do the priming.
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
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronhref
="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/co
ntribution
Message 2
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| Subject: | Re: Over-priming |
I believe that ALL Yak 50s have the primer positions reversed!!No idea
why,since there is no technical reason I can think of that would make
them want to change.
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: Monday, September 21, 2009 3:20 PM
Subject: RE: Yak-List: Over-priming
Point, MALS-14 64E" <mark.bitterlich@navy.mil>
Strange as it may seem... On the YAK-52 you turn it to the right to
prime the engine, on my YAK-50, you turn it to the LEFT to prime the
engine. It all gets very confusing. I've always kind of wondered if
it
is just MY 50 that is backwards from everyone else!
Doc? Tom?
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
Savarese
Sent: Friday, September 18, 2009 20:21
To: yak-list@matronics.com
Subject: Re: Yak-List: Over-priming
Yes, that is correct Terry. The Yak uses the primer pump for both
functions: pressurize the fuel system by rotating the primer pump to
the
left and pumping until adequate fuel pressure can be seen on the fuel
pressure gauge. Turning the primer pump to the right and pumping
primes
the engine.
On the CJ, the wobble pump performs the same function as turning the
Yak's primer pump to the left and pumping - pressurizing the fuel
system. The CJ's primer pump on the right console is identical to the
Yak primer pump turned to the right. On the CJ, this primer pump can
be
turned to the left or right to prime the engine. Whereas on the Yak
it
must be turned to the right to prime the engine.
Dennis
----- Original Message -----
From: Terry Calloway <mailto:terrycalloway@mac.com>
To: yak-list@matronics.com
Sent: Friday, September 18, 2009 10:21 AM
Subject: Re: Yak-List: Over-priming
There is a difference in the Yak and CJ primers. Can someone
offer additional discussion on priming an M-14 installed on the CJ? I
believe the Yak primer is also the wobble pump which is the difference
in Cylinder and Line which you mention. Is this correct?
Thanks;
tc
On Sep 18, 2009, at 9:19 AM, Richard Goode wrote:
There seem to be a lot of methods for priming - by
definition, they cannot all be correct. It does help to understand
how
the system works:
There are two positions on the priming pump:
* Cylinder, and line (sometimes also written as
system).
* Excessive priming into the cylinder will
over-prime, and that can have serious effects!
* Priming into line / system is simply priming the
carburettor and building up fuel pressure. You can do this all day,
and excess fuel simply returns back from the carburettor.
* The Russian manuals are misleading in that they
are all geared to having an external engineer to turn the propeller.
Of course this is fine if you have such a person, but most of us do
not,
and it really is most inconvenient to keep hoping in and out of the
cockpit, and quite simply, it is not necessary.
So the correct procedure is:
* Turn the prop at least 10 complete revolutions
to avoid hydraulic-lock.
* In the aeroplane, select line/system, and pump a
good number of times. I say a number of times, simply because in hot
weather etc you can get air in the system, and given that it does not
matter if you over-prime on line/system, you want to make sure that
each
pump is totally fuel and not air before priming onto cylinder.
* Prime onto cylinder - between 3 and 5 primes is
all you need. More than 5 and you are almost certainly over-
priming.
* Check that you still have good fuel pressure
from the priming to line/system; if not, a couple more pumps on the
line/system to build it up.
* Set throttle.
* Start with magnetos off, and then on when it
fires.
* Having left the primer out, but on the cylinder
side, as soon as if fires give it one pump - possibly more in cold
weather, but again no more than that.
* Keep the engine running on the throttle.
* Lock primer.
Of course if you have someone outside to turn the prop
through 2/3 revolutions while the cylinders are being primed, this is
helpful, but not necessary.
IF however air is low, then it is worth while sucking in
while priming, or if by your self (having checked everything is off)
having primed on cylinder then do the priming.
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
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronhre
f
="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
o
ntribution
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Message 3
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Nope, that's the way they are !
kp
-----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: 21 September 2009 15:21
Subject: RE: Yak-List: Over-priming
--> Point, MALS-14 64E" <mark.bitterlich@navy.mil>
Strange as it may seem... On the YAK-52 you turn it to the right to prime
the engine, on my YAK-50, you turn it to the LEFT to prime the engine. It
all gets very confusing. I've always kind of wondered if it is just MY 50
that is backwards from everyone else!
Doc? Tom?
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese
Sent: Friday, September 18, 2009 20:21
Subject: Re: Yak-List: Over-priming
Yes, that is correct Terry. The Yak uses the primer pump for both
functions: pressurize the fuel system by rotating the primer pump to the
left and pumping until adequate fuel pressure can be seen on the fuel
pressure gauge. Turning the primer pump to the right and pumping primes the
engine.
On the CJ, the wobble pump performs the same function as turning the Yak's
primer pump to the left and pumping - pressurizing the fuel system. The
CJ's primer pump on the right console is identical to the Yak primer pump
turned to the right. On the CJ, this primer pump can be turned to the left
or right to prime the engine. Whereas on the Yak it must be turned to the
right to prime the engine.
Dennis
----- Original Message -----
From: Terry Calloway <mailto:terrycalloway@mac.com>
To: yak-list@matronics.com
Sent: Friday, September 18, 2009 10:21 AM
Subject: Re: Yak-List: Over-priming
There is a difference in the Yak and CJ primers. Can someone offer
additional discussion on priming an M-14 installed on the CJ? I believe the
Yak primer is also the wobble pump which is the difference in Cylinder and
Line which you mention. Is this correct?
Thanks;
tc
On Sep 18, 2009, at 9:19 AM, Richard Goode wrote:
There seem to be a lot of methods for priming - by
definition, they cannot all be correct. It does help to understand how
the system works:
There are two positions on the priming pump:
* Cylinder, and line (sometimes also written as
system).
* Excessive priming into the cylinder will
over-prime, and that can have serious effects!
* Priming into line / system is simply priming the
carburettor and building up fuel pressure. You can do this all day,
and excess fuel simply returns back from the carburettor.
* The Russian manuals are misleading in that they
are all geared to having an external engineer to turn the propeller.
Of course this is fine if you have such a person, but most of us do not, and
it really is most inconvenient to keep hoping in and out of the cockpit, and
quite simply, it is not necessary.
So the correct procedure is:
* Turn the prop at least 10 complete revolutions
to avoid hydraulic-lock.
* In the aeroplane, select line/system, and pump a
good number of times. I say a number of times, simply because in hot
weather etc you can get air in the system, and given that it does not matter
if you over-prime on line/system, you want to make sure that each pump is
totally fuel and not air before priming onto cylinder.
* Prime onto cylinder - between 3 and 5 primes is
all you need. More than 5 and you are almost certainly over- priming.
* Check that you still have good fuel pressure
from the priming to line/system; if not, a couple more pumps on the
line/system to build it up.
* Set throttle.
* Start with magnetos off, and then on when it
fires.
* Having left the primer out, but on the cylinder
side, as soon as if fires give it one pump - possibly more in cold weather,
but again no more than that.
* Keep the engine running on the throttle.
* Lock primer.
Of course if you have someone outside to turn the prop
through 2/3 revolutions while the cylinders are being primed, this is
helpful, but not necessary.
IF however air is low, then it is worth while sucking in
while priming, or if by your self (having checked everything is off) having
primed on cylinder then do the priming.
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
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronhref
="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/co
ntribution
Message 4
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Same for my 50 as yours, prime the main to the left.
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: Monday, September 21, 2009 9:21 AM
Subject: RE: Yak-List: Over-priming
MALS-14 64E" <mark.bitterlich@navy.mil>
Strange as it may seem... On the YAK-52 you turn it to the right to
prime the engine, on my YAK-50, you turn it to the LEFT to prime the
engine. It all gets very confusing. I've always kind of wondered if it
is just MY 50 that is backwards from everyone else!
Doc? Tom?
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
Savarese
Sent: Friday, September 18, 2009 20:21
Subject: Re: Yak-List: Over-priming
Yes, that is correct Terry. The Yak uses the primer pump for both
functions: pressurize the fuel system by rotating the primer pump to the
left and pumping until adequate fuel pressure can be seen on the fuel
pressure gauge. Turning the primer pump to the right and pumping primes
the engine.
On the CJ, the wobble pump performs the same function as turning the
Yak's primer pump to the left and pumping - pressurizing the fuel
system. The CJ's primer pump on the right console is identical to the
Yak primer pump turned to the right. On the CJ, this primer pump can be
turned to the left or right to prime the engine. Whereas on the Yak it
must be turned to the right to prime the engine.
Dennis
----- Original Message -----
From: Terry Calloway <mailto:terrycalloway@mac.com>
To: yak-list@matronics.com
Sent: Friday, September 18, 2009 10:21 AM
Subject: Re: Yak-List: Over-priming
There is a difference in the Yak and CJ primers. Can someone
offer additional discussion on priming an M-14 installed on the CJ? I
believe the Yak primer is also the wobble pump which is the difference
in Cylinder and Line which you mention. Is this correct?
Thanks;
tc
On Sep 18, 2009, at 9:19 AM, Richard Goode wrote:
There seem to be a lot of methods for priming - by
definition, they cannot all be correct. It does help to understand how
the system works:
There are two positions on the priming pump:
* Cylinder, and line (sometimes also written as
system).
* Excessive priming into the cylinder will
over-prime, and that can have serious effects!
* Priming into line / system is simply priming the
carburettor and building up fuel pressure. You can do this all day,
and excess fuel simply returns back from the carburettor.
* The Russian manuals are misleading in that they
are all geared to having an external engineer to turn the propeller.
Of course this is fine if you have such a person, but most of us do not,
and it really is most inconvenient to keep hoping in and out of the
cockpit, and quite simply, it is not necessary.
So the correct procedure is:
* Turn the prop at least 10 complete revolutions
to avoid hydraulic-lock.
* In the aeroplane, select line/system, and pump a
good number of times. I say a number of times, simply because in hot
weather etc you can get air in the system, and given that it does not
matter if you over-prime on line/system, you want to make sure that each
pump is totally fuel and not air before priming onto cylinder.
* Prime onto cylinder - between 3 and 5 primes is
all you need. More than 5 and you are almost certainly over- priming.
* Check that you still have good fuel pressure
from the priming to line/system; if not, a couple more pumps on the
line/system to build it up.
* Set throttle.
* Start with magnetos off, and then on when it
fires.
* Having left the primer out, but on the cylinder
side, as soon as if fires give it one pump - possibly more in cold
weather, but again no more than that.
* Keep the engine running on the throttle.
* Lock primer.
Of course if you have someone outside to turn the prop
through 2/3 revolutions while the cylinders are being primed, this is
helpful, but not necessary.
IF however air is low, then it is worth while sucking in
while priming, or if by your self (having checked everything is off)
having primed on cylinder then do the priming.
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
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronhref
="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/co
ntribution
Message 5
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| Subject: | Frosty's Yak 50 for sale????? |
Saw Keith Frost's Yak 50 for sale today on Barnstormers. Wants to trade for
another airplane. =0A=0AWOW just because he is turning 50 years old-this
weekend?=0A=0AI don't understand.=0A
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