Below are two emails from a discussion on another list referencing the
accelerator jets on the M14 carburetor.
I ended up ordering the .9mm jet and will try that. I know Ted liked the
results of doing the mod that completely plugged the jet, figured I would
try this first and go from there. I wrote emails to the local M14 importers
to see if they had these jets and got no reply. Rob Kent from
www.wlacrussianeng.co.uk <http://www.wlacrussianeng.co.uk/> was very
helpful and called the same day I placed the internet order to discuss
shipping ( I suspect his phone call from England to the US cost more than
the shipping).
Anyway, good guys and they have a lot of the smaller parts for the M14 in
stock.
Scott
Moose 174
From:
"Richard Goode" <richard.goode@russianaeros.com>
Subject:
Accelerator Jet
<http://www.matronics.com/searching/getm ... 83?KEYS=ri
chard_goode?LISTNAME=Yak?HITNUMBER=17?SERIAL=16514612918?SHOWBUTTONS=NO>
Date:
Sep 27, 2004
Accelerator Jet
I have seen with interest correspondence on this.
In my humble opinion blocking the jet is a rather crude solution.
The AK14 carburetor is very sophisticated, and unfortunately, few people
understand
either its workings, or how to set it up.
The accelerator jet has the specific purpose of momentarily increasing the
richness
of the mixture to avoid hesitation on opening the throttle. Clearly too
much fuel at this stage can also cause a hesitation through a "rich cut."
The manufacturers get round this by having six different jets, which are
interchangeable
(ranging from 0.9mm to 1.4mm).
I can see that an engine with a very large jet and therefore noticeable rich
hesitation
will improve by having the jet blanked off completely, but generally
it has got to be a far better solution to install the correct jet!
A well set up M14P will generally run like a sewing machine - sadly very few
are!
Richard Goode
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
Match:
#1
Message:
#16280
From:
"Rob Kent" <spares@russianaeros.com>
Subject:
carb jets
<http://www.matronics.com/searching/getm ... 68?KEYS=ca
rb_jets?LISTNAME=Yak?HITNUMBER=1?SERIAL=16501012580?SHOWBUTTONS=NO>
Date:
Sep 29, 2004
The carburetor uses a number of different jets. In his email Richard
mentions the acceleration pump fuel jet. These jets are the same as the
suction jets. The only difference between the two is the diameter of the
hole in the jet.
The suction jets range in interchangeable sizes from 1.3mm to 2.0mm
inclusive. Increasing the jet diameter will lean out the mixture. Decreasing
the jet diameter enriches the mixture and helps keep the engine cool at high
power settings. A change in jet diameter of 0.1mm changes the specific fuel
consumption at take-off rating for 10 to 15 grams per horse power per hour.
It is normal practice, after changing this jet to adjust the engine in
cruise
rating II via the metering needle adjustment screw.
The acceleration pump fuel jets range in interchangeable sizes from 0.9mm to
1.4mm inclusive. When increasing the acceleration jet diameter, the
acceleration pump delivery increases and vice versa.
These jets are available from stock as a set ranging from 0.9mm to 1.9mm
inclusive (one of each size per set) or as individual sizes (2.0mm not
available). More information can be obtained by contacting me by phone, fax
or email or, alternatively by visiting our website.
Regards
Rob Kent
Stores Manager
WLAC - Russian Engineering
www.wlacrussianeng.co.uk
Tel:- +44 1628 829165
Fax:- +44 1628 828961
-----------------------------------------------------------------
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Moose - M14 carburator jets
-
Ted Waltman
Moose - M14 carburator jets
Scott,
It will be interesting to compare notes after you try the 9mm jet.
Question: In the link to Richard Goode's note, he mentions a wide
variety of available jet sizes. How did you decide on the 9mm one?
Won't density altitude play a large role in determining how efficient
the new jet works?
I certainly agree that plugging the jet isn't pretty, but, I still
wonder about how different density altitudes will play in the overall
effectiveness of engine response at that critical "I need power now"
time...
Ted
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Scott Aldrich
Sent: Monday, November 01, 2004 8:54 PM
To: rebel-builders@dcsol.com
Subject: Moose - M14 carburator jets
Below are two emails from a discussion on another list referencing the
accelerator jets on the M14 carburetor.
I ended up ordering the .9mm jet and will try that. I know Ted liked
the results of doing the mod that completely plugged the jet, figured I
would try this first and go from there. I wrote emails to the local M14
importers to see if they had these jets and got no reply. Rob Kent from
www.wlacrussianeng.co.uk <http://www.wlacrussianeng.co.uk/> was very
helpful and called the same day I placed the internet order to discuss
shipping ( I suspect his phone call from England to the US cost more
than the shipping).
Anyway, good guys and they have a lot of the smaller parts for the M14
in stock.
Scott
Moose 174
From:
"Richard Goode" <richard.goode@russianaeros.com>
Subject:
Accelerator Jet
<http://www.matronics.com/searching/getm ... 013183?KEY
S=richard_goode?LISTNAME=Yak?HITNUMBER=17?SERIAL=16514612918?SHOWBUTTONS
=NO>
Date:
Sep 27, 2004
Accelerator Jet
I have seen with interest correspondence on this.
In my humble opinion blocking the jet is a rather crude solution.
The AK14 carburetor is very sophisticated, and unfortunately, few people
understand either its workings, or how to set it up.
The accelerator jet has the specific purpose of momentarily increasing
the richness of the mixture to avoid hesitation on opening the throttle.
Clearly too much fuel at this stage can also cause a hesitation through
a "rich cut."
The manufacturers get round this by having six different jets, which are
interchangeable (ranging from 0.9mm to 1.4mm).
I can see that an engine with a very large jet and therefore noticeable
rich hesitation will improve by having the jet blanked off completely,
but generally it has got to be a far better solution to install the
correct jet!
A well set up M14P will generally run like a sewing machine - sadly very
few are!
Richard Goode
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
Match:
#1
Message:
#16280
From:
"Rob Kent" <spares@russianaeros.com>
Subject:
carb jets
<http://www.matronics.com/searching/getm ... 035268?KEY
S=ca
rb_jets?LISTNAME=Yak?HITNUMBER=1?SERIAL=16501012580?SHOWBUTTONS=NO>
Date:
Sep 29, 2004
The carburetor uses a number of different jets. In his email Richard
mentions the acceleration pump fuel jet. These jets are the same as the
suction jets. The only difference between the two is the diameter of the
hole in the jet.
The suction jets range in interchangeable sizes from 1.3mm to 2.0mm
inclusive. Increasing the jet diameter will lean out the mixture.
Decreasing the jet diameter enriches the mixture and helps keep the
engine cool at high power settings. A change in jet diameter of 0.1mm
changes the specific fuel consumption at take-off rating for 10 to 15
grams per horse power per hour. It is normal practice, after changing
this jet to adjust the engine in cruise rating II via the metering
needle adjustment screw.
The acceleration pump fuel jets range in interchangeable sizes from
0.9mm to 1.4mm inclusive. When increasing the acceleration jet diameter,
the acceleration pump delivery increases and vice versa.
These jets are available from stock as a set ranging from 0.9mm to 1.9mm
inclusive (one of each size per set) or as individual sizes (2.0mm not
available). More information can be obtained by contacting me by phone,
fax or email or, alternatively by visiting our website.
Regards
Rob Kent
Stores Manager
WLAC - Russian Engineering
www.wlacrussianeng.co.uk
Tel:- +44 1628 829165
Fax:- +44 1628 828961
-----------------------------------------------------
List archives located at: https://www.dcsol.com/
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------
-----------------------------------------------------------------
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-----------------------------------------------------------------
It will be interesting to compare notes after you try the 9mm jet.
Question: In the link to Richard Goode's note, he mentions a wide
variety of available jet sizes. How did you decide on the 9mm one?
Won't density altitude play a large role in determining how efficient
the new jet works?
I certainly agree that plugging the jet isn't pretty, but, I still
wonder about how different density altitudes will play in the overall
effectiveness of engine response at that critical "I need power now"
time...
Ted
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Scott Aldrich
Sent: Monday, November 01, 2004 8:54 PM
To: rebel-builders@dcsol.com
Subject: Moose - M14 carburator jets
Below are two emails from a discussion on another list referencing the
accelerator jets on the M14 carburetor.
I ended up ordering the .9mm jet and will try that. I know Ted liked
the results of doing the mod that completely plugged the jet, figured I
would try this first and go from there. I wrote emails to the local M14
importers to see if they had these jets and got no reply. Rob Kent from
www.wlacrussianeng.co.uk <http://www.wlacrussianeng.co.uk/> was very
helpful and called the same day I placed the internet order to discuss
shipping ( I suspect his phone call from England to the US cost more
than the shipping).
Anyway, good guys and they have a lot of the smaller parts for the M14
in stock.
Scott
Moose 174
From:
"Richard Goode" <richard.goode@russianaeros.com>
Subject:
Accelerator Jet
<http://www.matronics.com/searching/getm ... 013183?KEY
S=richard_goode?LISTNAME=Yak?HITNUMBER=17?SERIAL=16514612918?SHOWBUTTONS
=NO>
Date:
Sep 27, 2004
Accelerator Jet
I have seen with interest correspondence on this.
In my humble opinion blocking the jet is a rather crude solution.
The AK14 carburetor is very sophisticated, and unfortunately, few people
understand either its workings, or how to set it up.
The accelerator jet has the specific purpose of momentarily increasing
the richness of the mixture to avoid hesitation on opening the throttle.
Clearly too much fuel at this stage can also cause a hesitation through
a "rich cut."
The manufacturers get round this by having six different jets, which are
interchangeable (ranging from 0.9mm to 1.4mm).
I can see that an engine with a very large jet and therefore noticeable
rich hesitation will improve by having the jet blanked off completely,
but generally it has got to be a far better solution to install the
correct jet!
A well set up M14P will generally run like a sewing machine - sadly very
few are!
Richard Goode
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
Match:
#1
Message:
#16280
From:
"Rob Kent" <spares@russianaeros.com>
Subject:
carb jets
<http://www.matronics.com/searching/getm ... 035268?KEY
S=ca
rb_jets?LISTNAME=Yak?HITNUMBER=1?SERIAL=16501012580?SHOWBUTTONS=NO>
Date:
Sep 29, 2004
The carburetor uses a number of different jets. In his email Richard
mentions the acceleration pump fuel jet. These jets are the same as the
suction jets. The only difference between the two is the diameter of the
hole in the jet.
The suction jets range in interchangeable sizes from 1.3mm to 2.0mm
inclusive. Increasing the jet diameter will lean out the mixture.
Decreasing the jet diameter enriches the mixture and helps keep the
engine cool at high power settings. A change in jet diameter of 0.1mm
changes the specific fuel consumption at take-off rating for 10 to 15
grams per horse power per hour. It is normal practice, after changing
this jet to adjust the engine in cruise rating II via the metering
needle adjustment screw.
The acceleration pump fuel jets range in interchangeable sizes from
0.9mm to 1.4mm inclusive. When increasing the acceleration jet diameter,
the acceleration pump delivery increases and vice versa.
These jets are available from stock as a set ranging from 0.9mm to 1.9mm
inclusive (one of each size per set) or as individual sizes (2.0mm not
available). More information can be obtained by contacting me by phone,
fax or email or, alternatively by visiting our website.
Regards
Rob Kent
Stores Manager
WLAC - Russian Engineering
www.wlacrussianeng.co.uk
Tel:- +44 1628 829165
Fax:- +44 1628 828961
-----------------------------------------------------
List archives located at: https://www.dcsol.com/
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------
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-----------------------------------------------------------------
-
Scott Aldrich
Moose - M14 carburator jets
Hi Ted, my decision to go with the .9mm wasn't very scientific. It was the
smallest therefore the closest thing to being plugged, which I know works
from yours. There is that caveat about maybe not wanting to plug the jet if
operated in cold weather so I decided to go as small as possible without
plugging. Of course I may still end up plugging it. The jets aren't very
expensive so I have two sizes larger also, 1.0 and 1.2mm.
Scott
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Ted
Waltman
Sent: Tuesday, November 02, 2004 5:55 AM
To: rebel-builders@dcsol.com
Subject: RE: Moose - M14 carburator jets
Scott,
It will be interesting to compare notes after you try the 9mm jet.
Question: In the link to Richard Goode's note, he mentions a wide
variety of available jet sizes. How did you decide on the 9mm one?
Won't density altitude play a large role in determining how efficient
the new jet works?
I certainly agree that plugging the jet isn't pretty, but, I still
wonder about how different density altitudes will play in the overall
effectiveness of engine response at that critical "I need power now"
time...
Ted
-----------------------------------------------------------------
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-----------------------------------------------------------------
smallest therefore the closest thing to being plugged, which I know works
from yours. There is that caveat about maybe not wanting to plug the jet if
operated in cold weather so I decided to go as small as possible without
plugging. Of course I may still end up plugging it. The jets aren't very
expensive so I have two sizes larger also, 1.0 and 1.2mm.
Scott
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Ted
Waltman
Sent: Tuesday, November 02, 2004 5:55 AM
To: rebel-builders@dcsol.com
Subject: RE: Moose - M14 carburator jets
Scott,
It will be interesting to compare notes after you try the 9mm jet.
Question: In the link to Richard Goode's note, he mentions a wide
variety of available jet sizes. How did you decide on the 9mm one?
Won't density altitude play a large role in determining how efficient
the new jet works?
I certainly agree that plugging the jet isn't pretty, but, I still
wonder about how different density altitudes will play in the overall
effectiveness of engine response at that critical "I need power now"
time...
Ted
-----------------------------------------------------------------
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username "rebel" password "builder"
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