Today's Message Index:
----------------------
1. 12:18 AM - Re: CJ gear Actuator seals (woodja51)
2. 12:18 AM - Re: CJ gear Actuator seals (woodja51)
3. 03:49 AM - Re: Spare 52 Emergency Bottle? (A. Dennis Savarese)
4. 03:52 AM - Re: Spare 52 Emergency Bottle? (A. Dennis Savarese)
5. 04:01 AM - Re: Re: CJ gear Actuator seals (A. Dennis Savarese)
6. 08:58 AM - Re: Re: CJ gear Actuator seals (doug sapp)
7. 01:19 PM - WTB Yak 55M (dcrogers11)
8. 01:38 PM - Re: WTB Yak 55M (Etienne Verhellen)
9. 06:25 PM - Re: Wing Walk (JL2A)
10. 11:31 PM - L39 Formation Takeoff (Ernest Martinez)
11. 11:56 PM - Re: L39 Formation Takeoff (Richard Hess)
Message 1
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| Subject: | Re: CJ gear Actuator seals |
Hi all,
I have had an actuator spec' for new NBR seals. I have gotten a quote for a
Complete set from China at around 200USD for each size.
So ( for 22000 o rings !) it works out to be about $600.
I would go ahead and get a few complete sets , but my issue is that I wonder if
each actuator will need a different seal selection as there is info I the overhaul
Manual that implies one must select a size ring that gets a particular dimension
... So the set I order might only work properly on the one actuator I had measured.
You are correct that they are square section o rings and the outer sets
have .3 X 45 degree chamfers ( probably for ease of installation / prevent rolling)
.. I might go ahead with a set to see if they will work on the other U/S
actuators I have and if so the overhaul process is easy, but if a " grab" kit
is needed to accurately fit each actuator it is probably easier to get them
new / from PRC... Doug might be able to step in here for advice... Matt
CHina southern pilot,...
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=448174#448174
Message 2
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| Subject: | Re: CJ gear Actuator seals |
Hi all,
I have had an actuator spec' for new NBR seals. I have gotten a quote for a
Complete set from China at around 200USD for each size.
So ( for 22000 o rings !) it works out to be about $600.
I would go ahead and get a few complete sets , but my issue is that I wonder if
each actuator will need a different seal selection as there is info I the overhaul
Manual that implies one must select a size ring that gets a particular dimension
... So the set I order might only work properly on the one actuator I had measured.
You are correct that they are square section o rings and the outer sets
have .3 X 45 degree chamfers ( probably for ease of installation / prevent rolling)
.. I might go ahead with a set to see if they will work on the other U/S
actuators I have and if so the overhaul process is easy, but if a " grab" kit
is needed to accurately fit each actuator it is probably easier to get them
new / from PRC... Doug might be able to step in here for advice... Matt
CHina southern pilot,...
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=448175#448175
Message 3
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| Subject: | Re: Spare 52 Emergency Bottle? |
Rico,
Before you replace your emergency bottle, I'd like to suggest a test you
can do to determine if the leak is coming through the emergency air valve.
1 - Turn off the main air valve and make sure the emergency air valve is
also off tightly.
2 - Using the brake handle, squeeze off all the air out of the system
until you can not longer hear a "woosh" sound when you release the brake
handle.
3 - Make note of the air pressure in both the main and emergency system.
4 - Let the aircraft set for a least 4 hours. Overnight would be good.
5 - The next morning, squeeze the brake handle and if you hear a "woosh"
sound when the brake handle is released, one of the air valves, main or
emergency is leaking.
6 - Look at the air pressure instrument and see whether the main or
emergency air is less than what you left it at last night.
7 - Assuming the emergency air pressure has gone down, most likely you
have an emergency air valve leaking.
8 - If you remove the B nuts on the output side of the air valve and
spray some soapy water on the fitting, most likely it will bubble up.
Try this and let me know what you find.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/21/2015 2:56 PM, Rico Jaeger wrote:
>
> Does anyone have a spare airworthy Yak 52 emergency air bottle they
> would consider loaning / selling me? Primary system is tight, but I
> have been through my emergency system more than once and am now
> semi-convinced the leak is the bottle itself. The leak is
> substantial (...to the tune of complete depletion in 36 hours) and I
> would like to temporarily install another bottle to see if it holds. I
> would be happy to pay a deposit or purchase outright for the right price.
>
>
> Thank You!
>
>
> Rico Jaeger
> 915 S. 11th Ave.
> Wausau, WI. 54401
> 715.529.7426
> //
> 1966 Cessna 150F ^/---//-X
> N8558G //
> Hangar #35 / AUW
> //
> 1992 Yakovlev Yak 52 ^/---//-X
> N21YK //
> Hangar #21 / AUW
>
>
> http://www.matronics.com/contribution
Message 4
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| Subject: | Re: Spare 52 Emergency Bottle? |
Actually, the bottle can develop a pin hole in it too. Very rare
though. Much less likely on a 52 than a CJ because the 52's emergency
system is isolated from the compressor. I actually had a pin hole in my
emergency air bottle a very long time ago.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/21/2015 4:22 PM, Ernest Martinez wrote:
> Rico there is only 2 places your bottle can leak from, the fitting and
> the water drain plug. Spray some soapy water on those two places.
>
> I'm willing to bet it's either your emergency valve or your check
> valve, or one of the fittings in between.
>
>
> On Wednesday, October 21, 2015, Rico Jaeger <rocknpilot@hotmail.com
> <mailto:rocknpilot@hotmail.com>> wrote:
>
> Does anyone have a spare airworthy Yak 52 emergency air bottle
> they would consider loaning / selling me? Primary system is tight,
> but I have been through my emergency system more than once and am
> now semi-convinced the leak is the bottle itself. The leak is
> substantial (...to the tune of complete depletion in 36 hours) and
> I would like to temporarily install another bottle to see if it
> holds. I would be happy to pay a deposit or purchase outright for
> the right price.
>
>
> Thank You!
>
>
> Rico Jaeger
> 915 S. 11th Ave.
> Wausau, WI. 54401
> 715.529.7426
> //
> 1966 Cessna 150F ^/---//-X
> N8558G //
> Hangar #35 / AUW
> //
> 1992 Yakovlev Yak 52 ^/---//-X
> N21YK //
> Hangar #21 / AUW
>
>
> http://www.matronics.com/contribution
>
> ~,gM4Gqz.'8a
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> hn0"X,ZIJr*' +Iryhik k
> >-Zvkkj+x
> 'ojj+a
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> SPI'j[(jzyhikx&i
> kx&.+-
> &*'YN*.~zw,hjCex
fp
> 'o{k-0kx&'o
Message 5
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| Subject: | Re: CJ gear Actuator seals |
Unless you live in Chinaand need to overhaul your actuators there,
Doug's your guy. He spends tons of money buying and MAKING parts to
support our CJ and Yak community. The least we can do is support him
and buy from him. FWIW.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/22/2015 3:15 AM, woodja51 wrote:
>
> Hi all,
>
> I have had an actuator spec' for new NBR seals. I have gotten a quote for a
> Complete set from China at around 200USD for each size.
>
> So ( for 22000 o rings !) it works out to be about $600.
>
> I would go ahead and get a few complete sets , but my issue is that I wonder
if each actuator will need a different seal selection as there is info I the overhaul
> Manual that implies one must select a size ring that gets a particular dimension
... So the set I order might only work properly on the one actuator I had
measured. You are correct that they are square section o rings and the outer sets
have .3 X 45 degree chamfers ( probably for ease of installation / prevent
rolling) .. I might go ahead with a set to see if they will work on the other
U/S actuators I have and if so the overhaul process is easy, but if a " grab"
kit is needed to accurately fit each actuator it is probably easier to get them
new / from PRC... Doug might be able to step in here for advice... Matt
> CHina southern pilot,...
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=448174#448174
>
>
Message 6
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| Subject: | Re: CJ gear Actuator seals |
Matt,
I have about that number of seals here, some seem close to fitting but no
joy. I can't even start to estimate the number of actuators which I have
overhauled with "the correct" 0 rings only to find they still leaked. We
are at this time working with a US firm to try to discover a method of
overhauling the actuators with a newer style 0 rings which is currently
used in high pressure air systems in mines.
I too have discovered the need of different "heights/thickness" of 0 rings
for various cylinders depending on wear. This really threw a wrench into
the works with respect to stocking the 0 rings and offering a overhaul kit
to my customers. This problem pretty much precludes the customer from
doing the overhaul himself unless the kit contained all possible wear
combinations.
Round profile 0 rings do work, but they seem to not work for an extended
period of time.
A side note:
We have noted cracks in the actuator rams at the base (aft end), caused, we
think by the failure of the mech to properly adjust the overall length.
Rather these cracks will someday cause a ram failure is unknown but they
WILL eventually cause the failure of the aft end cap/lug. Depending on how
far you tear it down we are finding that there is much more to the overhaul
process than just changing out the 0 rings.
About your research:
If I can help any please let me know. If the company is willing to send me
a few samples I will be more than happy to give them a try and if they will
work I'll stock them. I have HP air in my shop with capabilities up to
1500PSI. HP air is necessary to check a overhauled actuator properly as it
should be held at least at operating pressure (45 BAR or about 650 psi) for
2-3 hours. Checking with normal shop air of 100 psi will not give a proper
indication
Give me a call if you have any additional thoughts.
Best,
Doug
On Thu, Oct 22, 2015 at 12:15 AM, woodja51 <mwuillemin@mac.com> wrote:
>
> Hi all,
>
> I have had an actuator spec' for new NBR seals. I have gotten a quote for a
> Complete set from China at around 200USD for each size.
>
> So ( for 22000 o rings !) it works out to be about $600.
>
> I would go ahead and get a few complete sets , but my issue is that I
> wonder if each actuator will need a different seal selection as there is
> info I the overhaul
> Manual that implies one must select a size ring that gets a particular
> dimension ... So the set I order might only work properly on the one
> actuator I had measured. You are correct that they are square section o
> rings and the outer sets have .3 X 45 degree chamfers ( probably for ease
> of installation / prevent rolling) .. I might go ahead with a set to see if
> they will work on the other U/S actuators I have and if so the overhaul
> process is easy, but if a " grab" kit is needed to accurately fit each
> actuator it is probably easier to get them new / from PRC... Doug might be
> able to step in here for advice... Matt
> CHina southern pilot,...
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=448174#448174
>
>
Message 7
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Hello all. I'm new here and in the market for a Yak 55M or might consider 55.
If you have or know of one that might not be listed in TAP or Barnstormers, please
let me know.
Thanks,
Don Rogers
817.559.3950
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=448194#448194
Message 8
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There is one for sale ... in Germany !
http://www.planecheck.com/image.asp?Imgname=27563/img011026938726.jpg
http://www.planecheck.com?ent=da&id=27563
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=448195#448195
Attachments:
http://forums.matronics.com//files/ae671980_8fe1_44e4_9694_be6511d9a4da_116.jpg
Message 9
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anyone tried replacing wing walk with a sheet of composite material, carbon or
glass fibre..?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=448204#448204
Message 10
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| Subject: | L39 Formation Takeoff |
I'm sitting in a meeting today, in San Jose CA. All of a sudden I hear a
roar, I look up and a formation of 4 L-39's fly right past my windows. All
same colors so its was definitely a team.
So Ok fess up!!!!!
Ernie
Message 11
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| Subject: | Re: L39 Formation Takeoff |
Probably The Patriots
Richard Hess
C 404-964-4885
> On Oct 23, 2015, at 2:28 PM, Ernest Martinez <erniel29@gmail.com> wrote:
>
> I'm sitting in a meeting today, in San Jose CA. All of a sudden I hear a r
oar, I look up and a formation of 4 L-39's fly right past my windows. All sa
me colors so its was definitely a team.
>
> So Ok fess up!!!!!
>
> Ernie
>
>
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=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
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=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
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=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
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=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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