Today's Message Index:
----------------------
1. 07:16 AM - Re: Re: Air Leak Advice (DaBear)
2. 10:26 AM - Re: Housai Compression (bill wade)
3. 10:56 AM - Re: Housai Compression (Gill Gutierrez)
4. 11:27 AM - Re: Housai Compression (doug sapp)
5. 11:35 AM - Re: Housai Compression (Gill Gutierrez)
6. 01:26 PM - Random L-39 Question (Rico Jaeger)
7. 01:27 PM - Re: Housai Compression (bill wade)
8. 03:09 PM - Re: Random L-39 Question (bill wade)
9. 04:27 PM - Re: Housai Compression (William Halverson)
10. 05:23 PM - Re: Random L-39 Question (Jon Boede)
11. 08:20 PM - Re: Random L-39 Question (migfighter42)
Message 1
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| Subject: | Re: Air Leak Advice |
Agree with Dennis. Some will, some will not. I=99ve had 2
airplanes and 3 different M14P(PF) and 1 started fine on N2. The other
2 would NOT start on N2.
Bear
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
Savarese
Sent: Tuesday, April 07, 2015 5:02 PM
Subject: Re: Yak-List: Re: Air Leak Advice
The only thing I will say is my own Yak 52 would absolutely NOT start on
N2. I agree with everything Mark Bitterlich posted on the subject.
Particularly the accuracy of the air start valve timing.
Dennis
_____
From: "migfighter42@gmail.com <mailto:migfighter42@gmail.com> "
<migfighter42@gmail.com <mailto:migfighter42@gmail.com> >
<yak-list@matronics.com <mailto:yak-list@matronics.com> >
Sent: Tuesday, April 7, 2015 3:25 PM
Subject: Re: Yak-List: Re: Air Leak Advice
My 1992 Yak-52 will not start on Nitrogen, period. The 1985 of which I
own a part (not sure why) will start on N2. I learned this the hard way
one weekend when we ran out of scuba air and used N2 that we normally
use in the MiG/L-29. Nothing, nada, kaput! At first we thought it was a
ignition issue, but it came on too suddenly. We swapped the N2 for
breathing air in the hanger and all the aircraft play nicely now.
To the comment of the valves being closed, most high performance engines
have both valves open during part of the normal compression operation
(overlap) because the velocity of the incoming gas and the outgoing gas
separates the pre and post burn volumes of air. When starting at a low
RPM, it is possible to get enough N2 into the cylinder to cause a
no-start.
As explained by Dennis, some M14=99s inject N2 into the cylinder
that the =9Cshower of sparks=9D is used. Some do not. I
suspect that Dennis will chime in at some point on the issue.
Bill
Sent from Windows Mail
From: Michael Wikstrom
Sent: =8ETuesday=8E, =8EApril=8E
=8E7=8E, =8E2015
=8E3=8E:=8E15=8E =8EPM
<mailto:michael@wikstrom.cc> >
Hi
I can confirm that the M14P starts perfectly well on pure nitrogen. On
a few occasions I've emptied my normal bottles and
the only thing they had at the airport where I was (Trieste in Italy)
was nitrogen. My standard bottle was completely empty and we filled to
50 bar with nitrogen
and it started immediately.
Michael Wikstrom
Yak18T
France
-----Original Message-----
From: owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com>
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich,
Mark G CIV NAVAIR, WD
Sent: mardi 7 avril 2015 16:59
Subject: RE: Yak-List: Re: Air Leak Advice
--> <mark.bitterlich@navy.mil <mailto:mark.bitterlich@navy.mil> >
Jim, concur on what you said, but there is somewhat more to consider,
both pro and con.
While air is being injected into one cylinder on the power stroke,
another cylinder with no air being injected at all, is on the intake, or
compression cycle, using nothing but "regular air". That fact supports
your premise of why in theory the engine should start perfectly with
nitrogen in the starting bottle.
The bad part is that the air distributor is not as straight forward as
you might think. Logic says that it simply injects air into each
cylinder on the power stroke, in firing order (kinda like a cars
distributor), but what most folks do not know is that it ALSO injects
air into the lower cylinders when the exhaust valves are OPEN (bottom
three). Due to camshaft overlap there will still be some nitrogen in
those cylinders when they go into their intake cycle. The Russians
designed the air distributor this way to help "blow out" any oil
collected in the lower three, which as everyone knows is a fact of life
with radials. Their engineers were pretty darn savvy (at least I think
so).
The third variable is the actual timing adjustment of the air
distributor. If you talk to anyone that has messed with these jewels,
they can be difficult to get set "perfectly". It is not unusual for
someone to get to the point where they say: "Heck, that's good enough".
Point being, it would not surprise me if more than a few of our aircraft
have this device slightly out of time. Put all this together, and the
end result is that the engine can be harder to start when you have pure
nitrogen in the starting bottle, but it always WILL start if you "set it
up" correctly with priming and pull through.
So my 2 cents is that EVERYONE is correct regarding this topic! :-)
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com>
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Jim
Sent: Tuesday, April 07, 2015 9:02 AM
Subject: Re: Yak-List: Re: Air Leak Advice
Jan,
You are correct. They start fine on Nitrogen. Or any other type of
inert gas or straight air. I would use either Nitrogen or bottled
"breathing air" as used by fire fighter's breathing apparatus.
Whichever is cheaper at your local welding supply shop.
I run into many who argue Nitrogen doesn't work for starting as it is
inert and thereby non-combustible. That statement only exposes their
lack of understanding of the internal combustion engine piston cycle.
Starting gas is injected into each cylinder on it's power stroke when
both valves are closed, not on it's intake stroke, and then starter gas
is expelled through the exhaust valve on the exhaust stroke. So start
air doesn't get involved in the combustion process. The intake stroke
still sucks in the normal fuel/air mixture from the carburetor prior
compression and ignition. If, on the other hand, the start gas were
injected on the intake stroke where would the fuel required for ignition
come from? Also with the intake valve open wouldn't the high pressure
starting gas be blown backwards down into the intake and carburetor?
These are the questions to ask the non-Nitrogen starting camp.
Jim
-------- Original message --------
From: Jan Mevis <jan.mevis@informavia.be
<mailto:jan.mevis@informavia.be> >
Subject: Re: Yak-List: Re: Air Leak Advice
<mailto:jan.mevis@informavia.be> >
I like this too.
Once a year I put the plane on jacks and check the emergency system too
(not having it slam the gear all the way).
At that occasion, both bottles are inspected and I refill completely
with industrial-quality dry air.
I thought about doing this annual check and refill with nitrogen,
though.
She starts with nitrogen too (done it several times).
Jan
On 07/04/15 01:33, "Bitterlich, Mark G CIV NAVAIR, WD"
<mark.bitterlich@navy.mil <mailto:mark.bitterlich@navy.mil> > wrote:
><mark.bitterlich@navy.mil <mailto:mark.bitterlich@navy.mil> >
>
>No question that filling the emergency bottle with something like dry
>water pumped nitrogen would be better than filling it from the engine
>compressor Jan.
>
>
>But consider this: On your 50, empty the emergency bottle. Easy to
do,
>just loosen the fitting on the check valve on the firewall and let it
>bleed to zero.
>
>
>Now connect to the external fill connection, and using dry water pumped
>nitrogen, fill it back up to 50 Atmos. Unless your system leaks, that
>nitrogen will stay in there for a LONG time. If you want, empty it
>every year and fill it again to make sure. So you have now
accomplished
>the same end that the 52 guys have right now, but more importantly.. if
>you ever have to blow the gear down with the emergency bottle AND IT
>DOES NOT WORK, you can fly around for awhile, let both bottle fill back
>up and try it again.
>
>
>Personally, I like that, a LOT. :-)
>
>
>Mark
>
>
>________________________________
>From: owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com>
>[owner-yak-list-server@matronics.com] on behalf of Jan Mevis
>[jan.mevis@informavia.be]
>Sent: Monday, April 06, 2015 12:26 PM
>To: yak-list@matronics.com <mailto:yak-list@matronics.com>
>Subject: Re: Yak-List: Re: Air Leak Advice
>
<mailto:jan.mevis@informavia.be> >
>
>One of the reasons could be that the emergency bottle on the 52 gets
>filled with perfectly dry air, from an industrial bottle.
>So less probability of oxidation etc.
>The water separator on the 50 can't do better than that.
>I had to replace the water separator on my 50 almost immediately when I
>bought it 10 years ago.
>It was supposed to be overhauled in 2000 in Shakthy.
>But I'm sure that they kept the original water separator from the
>eighties.
>I still have it, I can simply blow through it without any effort.
>
>Only an educated guess,
>
>Jan
>
>On 06/04/15 17:09, "Bitterlich, Mark G CIV NAVAIR, WD"
><mark.bitterlich@navy.mil <mailto:mark.bitterlich@navy.mil> > wrote:
>
>><mark.bitterlich@navy.mil <mailto:mark.bitterlich@navy.mil> >
>>
>>On the 50 it also is filled from the compressor.
>>
>>Wouldn't be too hard to change. I've always been curious why the
>>Russians decided to fill it (from the compressor) on the 50 and not on
>>the 52.
>>
>>Mark
>>
>>
>>-----Original Message-----
>>From: owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com>
>>[mailto:owner-yak-list-server@matronics.com] On Behalf Of flier
>>Sent: Sunday, April 05, 2015 9:00 AM
>>To: yak-list@matronics.com <mailto:yak-list@matronics.com>
>>Subject: Yak-List: Re: Air Leak Advice
>>
<mailto:flier@sbcglobal.net> >
>>
>>Thanks Dennis. All this time I thought the emergency was also being
>>replenished but I just looked at the schematic. I'll be darn.
>>Appreciate the reply.
>>
>>
>>
>>
>>Read this topic online here:
>>
>>http://forums.matronics.com/viewtopic.php?p=440289#440289
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
ky " =ED=9C=A2Z+ M4 G q ( w r =D3=85 I Qh =E9=94=B1
ax=C6=AD r ^j=DB=ABz Z ( =C7=AD =E9=9A=9F" =DB=AD X , Z I
J r *' ! y =DC=84:0 Zw =C7=82 E , jwf f f i 0 f
r ( Z ( jB m
&j ',r 5 =81=ABh .+- M $ NECI ' j[(j z y h j ~m
=DF=A2 f r ( m =DF=A2 f r ( B {k y jy2 *. z
. =CB=A9 1 m
)=DA=86 i 0 f r ( ( n b xm
&j ',r r & *' -Matt Dralle,
List===========
Message 2
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| Subject: | Re: Housai Compression |
Hay group I was doing a little searching on the net the other night and fou
nd that the M-14P and the Housai are the same Bore and stroke then I asked
myself if the cylinders are interchangeable.=C2-So my question to the gro
up=C2-is are the cylinder's interchangeable?=C2-Bill WadeN4450Y
=C2- From: Walter Lannon <wlannon@shaw.ca>
To: yak-list@matronics.com
Sent: Thursday, April 9, 2015 12:19 AM
Subject: Re: Yak-List: Housai Compression
Paul;
The generally accepted minimum is 65/80 (80%).=C2- =C2- You should do t
he test as
hot as possible and determine where the leakage is coming from.=C2- Relat
ively
easy for rings and exhaust valve not so easy for intake valves.
The minimum should really only apply to ring leakage.=C2- Valve leakage,
usually exhaust, needs to be dealt with.=C2- I have found with these engi
nes a
routine valve adjustment is necessary as the exhaust valve loses clearance
and leads to leakage and valve erosion.
Walt
--=C2- ---Original Message-----
From: Okanogan Lew
Sent: Monday, April 06, 2015 9:07 PM
Subject: Yak-List: Housai Compression
Guys & Jill, we did the annual compression test today on my CJ6 engine & it
ranged from 59-70 psi COLD.=C2- What is the minimum acceptable low?=C2-
Thanks in
advance.
Paul Lewis
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=440356#440356
S -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 3
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| Subject: | Housai Compression |
Bill,
Cylinders are not interchangeable. The following are the differences:
Items
M14P
Housai
Exhaust Valve
Sodium Cooled, diameter is same as Housai
Non-cooled valve
Exhaust Valve Guide
Larger to accommodate sodium filled valve stem
Smaller
Exhaust Port
Larger exhaust manifold fitting and port
Smaller exhaust manifold fitting and port
Intake Valve
same
same
If all cylinders were replaced and a Housai exhaust manifold were used
it should work just fine. But you would lose the durability of the
sodium cooled valves and you would have some addition exhaust
restriction due the smaller exhaust port. Also, die hard M14P owner
would suggest that the metallurgy was not as good, my guess is
they=99re wrong.
Gill
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of bill wade
Sent: Thursday, April 09, 2015 10:24 AM
Subject: Re: Yak-List: Housai Compression
Hay group I was doing a little searching on the net the other night and
found that the M-14P and the Housai are the same Bore and stroke then I
asked myself if the cylinders are interchangeable. So my question to the
group is are the cylinder's interchangeable?
Bill Wade
N4450Y
_____
From: Walter Lannon <wlannon@shaw.ca>
Sent: Thursday, April 9, 2015 12:19 AM
Subject: Re: Yak-List: Housai Compression
Paul;
The generally accepted minimum is 65/80 (80%). You should do the test
as
hot as possible and determine where the leakage is coming from.
Relatively
easy for rings and exhaust valve not so easy for intake valves.
The minimum should really only apply to ring leakage. Valve leakage,
usually exhaust, needs to be dealt with. I have found with these
engines a
routine valve adjustment is necessary as the exhaust valve loses
clearance
and leads to leakage and valve erosion.
Walt
-- ---Original Message-----
From: Okanogan Lew
Sent: Monday, April 06, 2015 9:07 PM
Subject: Yak-List: Housai Compression
Guys & Jill, we did the annual compression test today on my CJ6 engine &
it
ranged from 59-70 psi COLD. What is the minimum acceptable low? Thanks
in
advance.
Paul Lewis
Read this topic online here:
http://forums.matronics.com/viewtopictp://www.matronics.com/Navigator?Yak
-List <http://forums.matronics.com/viewtopic.php?p=440356#440356> "
target="_blank">http://www.mat -->
<http://www.matronics.com/contribution> & Download, 7-Day Browse, Chat,
===========
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| Subject: | Re: Housai Compression |
Gil,
Your confused I think or mis spoke. You said: If all cylinders were
replaced and a Housai exhaust manifold were used it should work just fine.
To my knowledge if a full set of 9 M14P cylinders were installed on a HS6A
AND the M14P exhaust system installed there would no no problems that I can
see. However, is is impossible to install a HS6A exhaust manifold on the
M14P cylinder because of the size of the exhaust boss nut being larger on
the M14P than the 285 hp HS6A. Yes you can change the exhaust nuts, but
that's a major hassle. After giving it a bit of thought I also think the
great Bundini made a adapter ring at one time, so maybe not impossible
after all, just impractical.
One exception:
If one used M462RF cylinders it would be a direct bolt up situation with
both the cylinder AND the 285 hp HS6A exhaust. This because the M462RF
uses the same basic cylinder as the M14P AND also has the SMALLER exhaust
boss nut which would allow the use of the 285 hp exhaust manifold. Rather
the 285 hp system's slightly smaller dia would be a plus or a minus I have
no idea.
Just my opinion, most likely worth exactly what you had to pay for it.
HS6A and M462RF cylinder sets for top overhaul will be available in the
near future.
Doug
On Thu, Apr 9, 2015 at 10:56 AM, Gill Gutierrez <gill.g@gpimail.com> wrote:
> Bill,
>
>
> Cylinders are not interchangeable. The following are the differences:
>
> Items
>
> M14P
>
> Housai
>
> Exhaust Valve
>
> Sodium Cooled, diameter is same as Housai
>
> Non-cooled valve
>
> Exhaust Valve Guide
>
> Larger to accommodate sodium filled valve stem
>
> Smaller
>
> Exhaust Port
>
> Larger exhaust manifold fitting and port
>
> Smaller exhaust manifold fitting and port
>
> Intake Valve
>
> same
>
> same
>
>
> If all cylinders were replaced and a Housai exhaust manifold were used it
> should work just fine. But you would lose the durability of the sodium
> cooled valves and you would have some addition exhaust restriction due th
e
> smaller exhaust port. Also, die hard M14P owner would suggest that the
> metallurgy was not as good, my guess is they=99re wrong.
>
>
> Gill
>
> *From:* owner-yak-list-server@matronics.com [mailto:
> owner-yak-list-server@matronics.com] *On Behalf Of *bill wade
> *Sent:* Thursday, April 09, 2015 10:24 AM
> *To:* yak-list@matronics.com
> *Subject:* Re: Yak-List: Housai Compression
>
>
> Hay group I was doing a little searching on the net the other night and
> found that the M-14P and the Housai are the same Bore and stroke then I
> asked myself if the cylinders are interchangeable. So my question to the
> group is are the cylinder's interchangeable?
>
> Bill Wade
>
> N4450Y
>
> ------------------------------
>
> *From:* Walter Lannon <wlannon@shaw.ca>
> *To:* yak-list@matronics.com
> *Sent:* Thursday, April 9, 2015 12:19 AM
> *Subject:* Re: Yak-List: Housai Compression
>
>
>
> Paul;
>
> The generally accepted minimum is 65/80 (80%). You should do the test
> as
> hot as possible and determine where the leakage is coming from.
> Relatively
> easy for rings and exhaust valve not so easy for intake valves.
> The minimum should really only apply to ring leakage. Valve leakage,
> usually exhaust, needs to be dealt with. I have found with these engines
> a
> routine valve adjustment is necessary as the exhaust valve loses clearanc
e
> and leads to leakage and valve erosion.
>
> Walt
>
> -- ---Original Message-----
> From: Okanogan Lew
> Sent: Monday, April 06, 2015 9:07 PM
> To: yak-list@matronics.com
> Subject: Yak-List: Housai Compression
>
>
> Guys & Jill, we did the annual compression test today on my CJ6 engine &
> it
> ranged from 59-70 psi COLD. What is the minimum acceptable low? Thanks
> in
> advance.
>
> Paul Lewis
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopictp://www.matronics.com/Navigator?Yak
-List"
> target="_blank">http://www.mat -->
> <http://forums.matronics.com/viewtopic.php?p=440356#440356>
> http://www.matronics <http://www.matronics.com/contribution>
> http://forums.matronics.com href="http://www.matronics.com/contribution
">
> http://www.matronics.com/contribution ==========
>
> *
>
===========
nics.com/Navigator?Yak-List>
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===========
om/contribution>
===========
>
> *
>
>
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| Subject: | Housai Compression |
Doug,
I am not confused. I think I said you would have to install a Housai
exhaust manifold which would have matching exhaust nuts.
Gill
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug sapp
Sent: Thursday, April 09, 2015 11:27 AM
Subject: Re: Yak-List: Housai Compression
Gil,
Your confused I think or mis spoke. You said: If all cylinders were
replaced and a Housai exhaust manifold were used it should work just
fine.
To my knowledge if a full set of 9 M14P cylinders were installed on a
HS6A AND the M14P exhaust system installed there would no no problems
that I can see. However, is is impossible to install a HS6A exhaust
manifold on the M14P cylinder because of the size of the exhaust boss
nut being larger on the M14P than the 285 hp HS6A. Yes you can change
the exhaust nuts, but that's a major hassle. After giving it a bit of
thought I also think the great Bundini made a adapter ring at one time,
so maybe not impossible after all, just impractical.
One exception:
If one used M462RF cylinders it would be a direct bolt up situation with
both the cylinder AND the 285 hp HS6A exhaust. This because the M462RF
uses the same basic cylinder as the M14P AND also has the SMALLER
exhaust boss nut which would allow the use of the 285 hp exhaust
manifold. Rather the 285 hp system's slightly smaller dia would be a
plus or a minus I have no idea.
Just my opinion, most likely worth exactly what you had to pay for it.
HS6A and M462RF cylinder sets for top overhaul will be available in the
near future.
Doug
On Thu, Apr 9, 2015 at 10:56 AM, Gill Gutierrez <gill.g@gpimail.com>
wrote:
Bill,
Cylinders are not interchangeable. The following are the differences:
Items
M14P
Housai
Exhaust Valve
Sodium Cooled, diameter is same as Housai
Non-cooled valve
Exhaust Valve Guide
Larger to accommodate sodium filled valve stem
Smaller
Exhaust Port
Larger exhaust manifold fitting and port
Smaller exhaust manifold fitting and port
Intake Valve
same
same
If all cylinders were replaced and a Housai exhaust manifold were used
it should work just fine. But you would lose the durability of the
sodium cooled valves and you would have some addition exhaust
restriction due the smaller exhaust port. Also, die hard M14P owner
would suggest that the metallurgy was not as good, my guess is
they=99re wrong.
Gill
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of bill wade
Sent: Thursday, April 09, 2015 10:24 AM
Subject: Re: Yak-List: Housai Compression
Hay group I was doing a little searching on the net the other night and
found that the M-14P and the Housai are the same Bore and stroke then I
asked myself if the cylinders are interchangeable. So my question to the
group is are the cylinder's interchangeable?
Bill Wade
N4450Y
_____
From: Walter Lannon <wlannon@shaw.ca>
Sent: Thursday, April 9, 2015 12:19 AM
Subject: Re: Yak-List: Housai Compression
Paul;
The generally accepted minimum is 65/80 (80%). You should do the test
as
hot as possible and determine where the leakage is coming from.
Relatively
easy for rings and exhaust valve not so easy for intake valves.
The minimum should really only apply to ring leakage. Valve leakage,
usually exhaust, needs to be dealt with. I have found with these
engines a
routine valve adjustment is necessary as the exhaust valve loses
clearance
and leads to leakage and valve erosion.
Walt
-- ---Original Message-----
From: Okanogan Lew
Sent: Monday, April 06, 2015 9:07 PM
Subject: Yak-List: Housai Compression
Guys & Jill, we did the annual compression test today on my CJ6 engine &
it
ranged from 59-70 psi COLD. What is the minimum acceptable low? Thanks
in
advance.
Paul Lewis
Read this topic online here:
http://forums.matronics.com/viewtopictp://www.matronics.com/Navigator?Yak
-List <http://forums.matronics.com/viewtopic.php?p=440356#440356> "
target="_blank">http://www.mat --> http://www.matronics
<http://www.matronics.com/contribution> http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
ontribution ===========
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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| Subject: | Random L-39 Question |
Just because I am always "learning"...I saw a pic of an L-39 cockpit and no
ticed 4 levers on the lower right side that I'm assuming are pneumatic cont
rols.(?) Can anyone tell me the purpose? THANX!
Rico Jaeger
915 S. 11th Ave.
Wausau=2C WI. 54401
715.529.7426
//
1966 Cessna 150F ^/---//-X
N8558G //Hangar #35 / AUW
//
1992 Yakovlev Yak 52 ^/---//-X
N21YK //Hangar #21 / AUW
=0A
Message 7
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| Subject: | Re: Housai Compression |
Thanks Gill that clears it up Bill
From: Gill Gutierrez <gill.g@gpimail.com>
To: yak-list@matronics.com
Sent: Thursday, April 9, 2015 1:56 PM
Subject: RE: Yak-List: Housai Compression
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ordSection1 {}-->Bill, =C2-Cylinders are not interchangeable.=C2- The f
ollowing are the differences:
| Items | M14P | Housai |
| Exhaust Valve | Sodium Cooled, diameter is same as Housai | Non-cooled va
lve |
| Exhaust Valve Guide | Larger to accommodate sodium filled valve stem | Sm
aller |
| Exhaust Port | Larger exhaust manifold fitting and port | Smaller exhaust
manifold fitting and port |
| Intake Valve | same | same |
=C2-If all cylinders were replaced and a Housai exhaust manifold were us
ed it should work just fine.=C2- But you would lose the durability of the
sodium cooled valves and you would have some addition exhaust restriction
due the smaller exhaust port.=C2- Also, die hard M14P owner would suggest
that the metallurgy was not as good, my guess is they=99re wrong.
=C2-GillFrom: owner-yak-list-server@matronics.com [mailto:owner-yak-list-
server@matronics.com] On Behalf Of bill wade
Sent: Thursday, April 09, 2015 10:24 AM
Subject: Re: Yak-List: Housai Compression =C2-Hay group I was doing a lit
tle searching on the net the other night and found that the M-14P and the H
ousai are the same Bore and stroke then I asked myself if the cylinders are
interchangeable.=C2-So my question to the group=C2-is are the cylinder
's interchangeable?=C2-Bill WadeN4450Y
=C2- From: Walter Lannon <wlannon@shaw.ca>
Sent: Thursday, April 9, 2015 12:19 AM
Subject: Re: Yak-List: Housai Compression
Paul;
The generally accepted minimum is 65/80 (80%).=C2- =C2- You should do t
he test as
hot as possible and determine where the leakage is coming from.=C2- Relat
ively
easy for rings and exhaust valve not so easy for intake valves.
The minimum should really only apply to ring leakage.=C2- Valve leakage,
usually exhaust, needs to be dealt with.=C2- I have found with these engi
nes a
routine valve adjustment is necessary as the exhaust valve loses clearance
and leads to leakage and valve erosion.
Walt
--=C2- ---Original Message-----
From: Okanogan Lew
Sent: Monday, April 06, 2015 9:07 PM
Subject: Yak-List: Housai Compression
Guys & Jill, we did the annual compression test today on my CJ6 engine & it
ranged from 59-70 psi COLD.=C2- What is the minimum acceptable low?=C2-
Thanks in
advance.
Paul Lewis
Read this topic online here:
http://forums.matronics.com/viewtopictp://www.matronics.com/Navigator?Yak-L
ist" target="_blank">http://www.mat=C2- --> http://www.matronicshttp://
forums.matronics.com href="http://www.matronics.com/contribution">http://
www.matronics.com/contribution ===========
Message 8
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| Subject: | Re: Random L-39 Question |
Rico this explains=C2-the cockpit orientation of the L39 LotusSim L-39 Tu
torial video 1 (part 1 / 3)
| =C2- |
| =C2- | | =C2- | =C2- | =C2- | =C2- | =C2- |
| LotusSim L-39 Tutorial video 1 (part 1 / 3) |
| |
| View on www.youtube.com | Preview by Yahoo |
| |
| =C2- |
=C2-=C2-the answer to your question is the lever closest to the pilot
- Gear, Flap,=C2-Emergency generator, Hydraulic interconnect, enjoy
=C2- From: Rico Jaeger <rocknpilot@hotmail.com>
To: "yak-list@matronics.com" <yak-list@matronics.com>
Sent: Thursday, April 9, 2015 4:26 PM
Subject: Yak-List: Random L-39 Question
<!--#yiv9413820599 .yiv9413820599hmmessage P{margin:0px;padding:0px;}#yiv94
13820599 body.yiv9413820599hmmessage{font-size:12pt;font-family:Calibri;}--
>Just because I am always "learning"...I saw a pic of an L-39 cockpit and n
oticed 4 levers on the lower right side that I'm assuming are pneumatic con
trols.(?) Can anyone tell me the purpose? THANX!
Rico Jaeger
915 S. 11th Ave. =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2-
=C2-
Wausau, WI. 54401 =C2- =C2-=C2-
715.529.7426 =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2-
=C2-
=C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2
- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2-
=C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2
- =C2- =C2- //
1966 Cessna 150F=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2
-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-
=C2-=C2-=C2-=C2-=C2- ^/---//-X
N8558G =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2
- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2-
=C2- =C2- =C2- =C2- =C2-//Hangar #35 / AUW
=C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2
- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2-
=C2- =C2- =C2- =C2- //=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2
-=C2-=C2-=C2-=C2-=C2-=C2-
1992 Yakovlev Yak 52=C2-=C2-=C2-=C2-^/---//-X
N21YK =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2-
=C2- =C2- =C2- =C2- =C2- =C2- =C2- //Hangar #21 / AUW
=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2
-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-
=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2
-=C2-=C2-=C2-=C2-
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Message 9
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| Subject: | Re: Housai Compression |
Hmmm ... let's see ... 285HP cylinders in a 440HP engine...
What could go wrong?
;-)
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@m
atronics.com] On Behalf Of bill wade
Sent: Thursday, April 09, 2015 10:24 AM
Subject: Re: Yak-List: Housai Compression
Hay group I was doing a little searching on the net the other night and f
ound that the M-14P and the Housai are the same Bore and stroke then I as
ked myself if the cylinders are interchangeable. So my question to the gr
oup is are the cylinder's interchangeable?
Bill Wade
N4450Y
Message 10
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| Subject: | Random L-39 Question |
Emergency hydraulic levers.
Gear=2C flaps=2C ram air tubine. You'll notice that the top of the levers
have different shapes=2C for example=2C emergency gear hydraulic is shaped
like the gear handle.
The 4th cross-connects the primary and emergency systems.
From: rocknpilot@hotmail.com
Subject: Yak-List: Random L-39 Question
=0A
=0A
=0A
Just because I am always "learning"...I saw a pic of an L-39 cockpit and no
ticed 4 levers on the lower right side that I'm assuming are pneumatic cont
rols.(?) Can anyone tell me the purpose? THANX!
Rico Jaeger
915 S. 11th Ave.
Wausau=2C WI. 54401
715.529.7426
//
1966 Cessna 150F ^/---//-X
N8558G //Hangar #35 / AUW
//
1992 Yakovlev Yak 52 ^/---//-X
N21YK //Hangar #21 / AUW
=0A
=0A
=0A
=0A
=0A
============0A
============0A
============0A
============0A
=0A
Message 11
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| Subject: | Random L-39 Question |
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