Today's Message Index:
----------------------
1. 08:37 AM - Re: Best Headset (Genzlinger, Reade)
2. 11:51 AM - Re: Best Headset (Herb Coussons)
3. 01:23 PM - Pop-off valve (John Graham)
4. 03:01 PM - Re: Pop-off valve (Robert Langford)
5. 04:35 PM - Re: Pop-off valve (A. Dennis Savarese)
6. 05:53 PM - Anyone in Madison? (GreasySideUp)
7. 09:07 PM - Re: Pop-off valve (Walter Lannon)
Message 1
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I have used several types and believe -
- For Yak-52 and similar the Bose Series II are the best (this is
the second generation of their ANR headsets - although heavy they handle
the environment quite well).
- For everything else the Bose X is great (much lighter than the
Series II)
- A close second is the LIghtspeed 30G although in the Yak they
cannot handle the take off - at cruise they are fine.
Reade Genzlinger
Cairnwood Cooperative Corporation
mailto:readeg@cairnwood.com <mailto:readeg@cairnwood.com>
215.914.0370
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Phil Gower
Sent: Thursday, July 03, 2008 4:22 PM
Subject: Yak-List: Best Headset
Hi Listers, I have purchased a Yak 18t, soon to be flying, and thought I
would investigate suitable noise cancelling headsets.
There a few available and would be interested to get your
recommendations as to which model to purchase that work best at reducing
the noise (inside the cockpit), at the frequencies produced by the M14P.
Cheers, Phil Gower.
Message 2
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| Subject: | Re: Best Headset |
I use the David Clark H10-13 (when not using a helmet) I like the
noise canceling AND i think it one of the quietest and comfortable of
the traditional headset styles when the noise cancelling is off. The
battery module has an auto off feature. It also fits the leather
flight helmet from gibson and Barnes.
Herb
On Jul 3, 2008, at 3:21 PM, Phil Gower wrote:
> Hi Listers, I have purchased a Yak 18t, soon to be flying, and
> thought I would investigate suitable noise cancelling headsets.
>
> There a few available and would be interested to get your
> recommendations as to which model to purchase that work best at
> reducing the noise (inside the cockpit), at the frequencies produced
> by the M14P.
>
> Cheers, Phil Gower.
>
>
Message 3
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Happy Fourth of July!- I am having an issue with my pop-off valve.- If
I leave the snot valve in during cruise, the main air pressure climbs to ov
er 8 on the scale (80 ATMs).- If I cruise with the snot open, it will not
climb much above 5.- When I land and it is at 8, the pop-off valve slowl
y hisses for an hour or more and slowly reduces to about 4.5.- The snot v
alve does GUSH air when opened after cruise if it has been left in (i.e., i
t works).
-
I disassembled the pop-off valve on the firewall and removed the spring - l
ooked fine, but I am not sure if it is the right one and have no idea how t
o verify if it is the correct size spring.- Also, there were 3 little rou
nd washers at the bottom of the spring - almost as if they were in there fo
r spacing purposes.- Is this normal?
-
So...I am at a loss as to what to do.- We have tried to adjust the nut on
the pop-off valve but can't seem to dial it in to pop at the right pressur
e (I presume the optimal pressure to pop would be 5.5).-
-
Any ideas?
John P. Graham
CubFlyer1940@Yahoo.com
Cell phone (630) 390-9451=0A=0A=0A
Message 4
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| Subject: | Re: Pop-off valve |
John:
I would be concerned about the pressure building to 8. assuming the
gauge is correct, you are building pressure to some 1,175 PSI. Too much
for the system. You are correct that Approx. 5.5 is the ideal
pressure.There should be no washers in the release valve, apparently
someone has added those. I would not be concerned if I could maintain
4.5 after leakdown as this is enough air for a start. Try it with some
of the washers removed. If you can maintain enough air, go with that.
Robert
----- Original Message -----
From: John Graham
To: Yak list
Sent: Friday, July 04, 2008 3:20 PM
Subject: Yak-List: Pop-off valve
Happy Fourth of July! I am having an issue with my pop-off
valve. If I leave the snot valve in during cruise, the main air
pressure climbs to over 8 on the scale (80 ATMs). If I cruise with the
snot open, it will not climb much above 5. When I land and it is at 8,
the pop-off valve slowly hisses for an hour or more and slowly reduces
to about 4.5. The snot valve does GUSH air when opened after cruise if
it has been left in (i.e., it works).
I disassembled the pop-off valve on the firewall and removed the
spring - looked fine, but I am not sure if it is the right one and have
no idea how to verify if it is the correct size spring. Also, there
were 3 little round washers at the bottom of the spring - almost as if
they were in there for spacing purposes. Is this normal?
So...I am at a loss as to what to do. We have tried to adjust
the nut on the pop-off valve but can't seem to dial it in to pop at the
right pressure (I presume the optimal pressure to pop would be 5.5).
Any ideas?
John P. Graham
CubFlyer1940@Yahoo.com
Cell phone (630) 390-9451
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-------------------------------------------------------------------------
-----
Checked by AVG.
7/3/2008 7:19 PM
Message 5
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| Subject: | Re: Pop-off valve |
John,
There should not be any washers/spacers inside the pop off valve.
Typically when someone installs them, it's because they could not get
enough spring tension on the piston to bring the pressure above 50
ATM's. You should probably replace the pop off valve piston or at least
the piston seal, available from M14P, Inc. As Jill if they have a
correct spring. Then reinstall the spring without the washers/spacers
and adjust to 55 ATM's pop off point. It should bleed down to about 50
ATM's once it shuts down.
Dennis
----- Original Message -----
From: John Graham
To: Yak list
Sent: Friday, July 04, 2008 3:20 PM
Subject: Yak-List: Pop-off valve
Happy Fourth of July! I am having an issue with my pop-off
valve. If I leave the snot valve in during cruise, the main air
pressure climbs to over 8 on the scale (80 ATMs). If I cruise with the
snot open, it will not climb much above 5. When I land and it is at 8,
the pop-off valve slowly hisses for an hour or more and slowly reduces
to about 4.5. The snot valve does GUSH air when opened after cruise if
it has been left in (i.e., it works).
I disassembled the pop-off valve on the firewall and removed the
spring - looked fine, but I am not sure if it is the right one and have
no idea how to verify if it is the correct size spring. Also, there
were 3 little round washers at the bottom of the spring - almost as if
they were in there for spacing purposes. Is this normal?
So...I am at a loss as to what to do. We have tried to adjust
the nut on the pop-off valve but can't seem to dial it in to pop at the
right pressure (I presume the optimal pressure to pop would be 5.5).
Any ideas?
John P. Graham
CubFlyer1940@Yahoo.com
Cell phone (630) 390-9451
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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3D
Message 6
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| Subject: | Anyone in Madison? |
I have a buddy looking to get into aircraft ownership and is considering the Yak
and CJ amongst others. If anyone is close to Madison I'd love to put him in
touch if you have the time to show off your plane.
Thanks!
-j
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=191287#191287
Message 7
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| Subject: | Re: Pop-off valve |
I find it hard to believe what I am reading here! 80 ATM??
Do you not have any manuals for your aircraft? The system TEST pressure is 75 ATM.
The operational limit is 50 ATM.
Your pressure relief valve is obviously in terrible condition. There should be
no washers, these were no doubt added by someone who either has no idea how the
system works or was too cheap to buy a new valve plunger or, more likely, both.
I assume you are flying a Yak52 where the emergency tank is not charged by the
compressor. If that is the case you are safe to set the relief pressure at a maximum
of 50 ATM. If it is a CJ6 you should set to a maximum of 45 ATM as you
will find the emergency pressure creeping up another 5 ATM.
All of this assumes of course that you have a serviceable relief valve.
At the very least you need a new valve plunger preferably with a new spring and
quite possibly a new valve body.
Doug Sapp has all of these in stock for the CJ. Whether they fit the 52 I don't
know but if not I'm sure George Coy or Jill can help you.
Walt
----- Original Message -----
From: John Graham
To: Yak list
Sent: Friday, July 04, 2008 1:20 PM
Subject: Yak-List: Pop-off valve
Happy Fourth of July! I am having an issue with my pop-off valve. If
I leave the snot valve in during cruise, the main air pressure climbs to over
8 on the scale (80 ATMs). If I cruise with the snot open, it will not climb much
above 5. When I land and it is at 8, the pop-off valve slowly hisses for
an hour or more and slowly reduces to about 4.5. The snot valve does GUSH air
when opened after cruise if it has been left in (i.e., it works).
I disassembled the pop-off valve on the firewall and removed the spring
- looked fine, but I am not sure if it is the right one and have no idea how
to verify if it is the correct size spring. Also, there were 3 little round washers
at the bottom of the spring - almost as if they were in there for spacing
purposes. Is this normal?
So...I am at a loss as to what to do. We have tried to adjust the nut
on the pop-off valve but can't seem to dial it in to pop at the right pressure
(I presume the optimal pressure to pop would be 5.5).
Any ideas?
John P. Graham
CubFlyer1940@Yahoo.com
Cell phone (630) 390-9451
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