Today's Message Index:
----------------------
1. 04:55 AM - Re: Sticky valve? (A. Dennis Savarese)
2. 06:27 AM - Re: Sticky valve? (Roger Kemp)
3. 06:47 AM - More Newby Questions (Stephen Jones)
4. 06:53 AM - Re: More Newby Questions (Richard Hess)
5. 06:54 AM - Re: Osh2015 (727gs@db3broadband.com)
6. 07:48 AM - Re: Housai engine and M-14P parts wanted (ADRIAN HALE)
7. 10:35 AM - Re: Osh2015 (cjpilot710)
8. 03:28 PM - YAK-50 landing gear actuators overhaul time. (Gordon Price)
9. 06:47 PM - Re: YAK-50 landing gear actuators overhaul time. (A. Dennis Savarese)
10. 07:06 PM - Re: YAK-50 landing gear actuators overhaul time. (Gordon Price)
11. 08:00 PM - Romanian IAR-823 (Frank)
12. 11:11 PM - Re: YAK-50 landing gear actuators overhaul time. (Jan Mevis)
Message 1
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| Subject: | Re: Sticky valve? |
When was the last time the gear actuators and diverter valves were overhaul
ed? What may be happening is the air pressure from the DOWN side of the act
uator is going by the seals in the actuator and out the UP side which goes
back to the gear selector.Dennis
From: JL2A <info@flyingwarbirds.com.au>
To: yak-list@matronics.com
Sent: Monday, July 20, 2015 11:18 PM
Subject: Yak-List: Sticky valve?
On a cold morning if the gear lever is selected down and main air turned on
it hisses out the selector for a while then stops. This morning it just di
dn't stop, figuring I have a sticky one way valve somewhere (what I get for
following manufacturers castor oil recommendation I suspect)
Anyone got a tip best place to start looking? For a CJ
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445005#445005
S -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 2
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| Subject: | Re: Sticky valve? |
Yep. Dennis is right.
Doc
Sent from my iPad
> On Jul 21, 2015, at 6:49 AM, A. Dennis Savarese <dsavarese0812@bellsouth.n
et> wrote:
>
> When was the last time the gear actuators and diverter valves were overhau
led? What may be happening is the air pressure from the DOWN side of the act
uator is going by the seals in the actuator and out the UP side which goes b
ack to the gear selector.
> Dennis
>
> From: JL2A <info@flyingwarbirds.com.au>
> To: yak-list@matronics.com
> Sent: Monday, July 20, 2015 11:18 PM
> Subject: Yak-List: Sticky valve?
>
>
> On a cold morning if the gear lever is selected down and main air turned o
n it hisses out the selector for a while then stops. This morning it just di
dn't stop, figuring I have a sticky one way valve somewhere (what I get for f
ollowing manufacturers castor oil recommendation I suspect)
>
> Anyone got a tip best place to start looking? For a CJ
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.ronics.com/Navigator?Yak-List" targe
t="_blank">http://www.matronics.com/N - MATRONICS WEB FORUMS -
http
>
>
>
>
>
>
>
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D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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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
>
Message 3
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| Subject: | More Newby Questions |
I have a couple more quick questions.
First off, is there going to be a Cj/Yak Forum at OSH?
Second, is there anyone around that might be interested in checking me out in their
CJ? Of course I'd cover any costs and expenses. I'd like to be ready
to go when our airplane comes out of its condition inspection and it's
been several years since I flew one.
In fact, I'll be at OSH all week and then some. Anyone available up there?
Thanks for your time,
Steve Jones
N76187
Near Chicago
Message 4
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| Subject: | Re: More Newby Questions |
Steve
I have access to both a standard CJ and one with an M14P. You can reach me o
ff list.
Richard Hess
C 404-964-4885
> On Jul 21, 2015, at 9:44 AM, Stephen Jones <727gs@att.net> wrote:
>
>
> I have a couple more quick questions.
>
> First off, is there going to be a Cj/Yak Forum at OSH?
>
> Second, is there anyone around that might be interested in checking me out
in their CJ? Of course I'd cover any costs and expenses. I'd like to be rea
dy to go when our airplane comes out of its condition inspection and it's be
en several years since I flew one.
> In fact, I'll be at OSH all week and then some. Anyone available up there?
>
> Thanks for your time,
> Steve Jones
> N76187
> Near Chicago
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
Message 5
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Where is the RPA tent?
Steve
On 2015-07-19 06:21, Russ wrote:
>
> I'll be at OSH on Thursday.
> See you at the RPA tent
>
> Russ 'Bull'
>
Message 6
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| Subject: | Re: Housai engine and M-14P parts wanted |
Would you consider an AI14R, It has one hour since first overhaul. A.A.
Hale Tulsa Okla. USA
On Jul 15, 2015, at 3:00 AM, Jay McIntyre <cjaviator@gmail.com> wrote:
> Hi all...
> I am in the market for a good 285HP Housai.
> All offers will be considered but ideally the engine will be 1st or
second life.
> It will need to be shipped to New Zealand.
>
> Also in the market for a serviceable M-14P accessory section. We don't
require magnetos and so forth, just an otherwise complete section.
>
> Please contact me off line at cjaviator@gmail.com
>
> Regards, Jay
> New Zealand
>
>
>
Message 7
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Cgo
Message 8
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| Subject: | YAK-50 landing gear actuators overhaul time. |
It is time to share an adrenaline moment and some good luck in my YAK 50.
As part of my airshow routine I do a final pass with the landing gear down. I
put the gear down below 150 kph. I did not get a green light on the right side.
The light tested OK. I asked the airboss if the gear was down.yes it was.
It was the end of the routine and I had a 10 minute flight back to Owen Sound
airport. Wondering about this, should I leave them, should I retract them,
I decided to retract them. At the airport I put the gear down, got 2 green lights
and landed uneventfully.
We checked the gear visually and the micro switches. That is when we found out
they we wired backwards, but they were working fine. Left means right. I guess
they were facing backwards during installation. A puzzle.
I flew the air show the next day and all was routine. except the weather.
The following week I flew another short demo flight, put the gear down and no right
green light. Since I had good luck last time retracting and extending I
did the same. No green light on the right side again, meaning it was a downlock
problem on the left gear. The light out checked OK. The air pressure was now
just under 3. The emergency system was 5.5. The ground confirmed both gear
were down.
Should I use the emergency system? I thought long and fast since there was not
a lot of fuel available and it was a very busy airport scene. I had sufficient
air pressure to extend the gear with the main system gear. Why then use an alternate
air system? To me, it was a downlock problem. Would the extra pressure
help that? I was not sure. So I decided to try and jar the gear into the
locked position first.
I got the speed back to about 110 kph getting the nose up and angle gear forward,
then bounced the left gear on the runway ready for an immediate go-around.
I heard a snap caught the green light out of the corner of my eye and landed
with 2 green lights. Ground observers confirmed the left wheel moved back about
an inch or two, then snapped forward.
I called Dennis, as I always do when I have a problem, and as usual, he had the
solution. Pull the actuators and send them to Jill at M14P Inc. So we did.
We got the actuators back and finally got them installed. Not an easy job. The
gear swing is certainly a lot more violent now. It was a good thing that we had
one person holding each wing tip down on the jacks during the swing. We havent
bothered to rewire them yet and I have not flown the airplane yet.
I spoke to Jill and the first thing she said was You dodged a bullet.
Apparently, during the initial test, they blew the end off the left actuator with
only 300psi.
I am so glad I did not use the emergency system and ram in all 850 psi. If the
end had blown off in the air what a mess.
Jill put on the last remaining new actuator cap and they are looking for more supply.
So that is my story. Comments criticisms are most welcome. That is the way we
all learn.
I dont have all the answers but I sure had some good luck this time.
And yes we will be removing the actuators in 5 years for another overhaul.
Message 9
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| Subject: | Re: YAK-50 landing gear actuators overhaul time. |
Gordon, it's not necessary to rewire the gear lights. Simply unscrew the lamp
holder knurled nuts, slide the lamp holders back thru the instrument panel and
swap their positions. Dennis
Sent from my iPhone
> On Jul 21, 2015, at 5:24 PM, Gordon Price <gord@thedampub.ca> wrote:
>
>
> It is time to share an adrenaline moment and some good luck in my YAK 50.
>
> As part of my airshow routine I do a final pass with the landing gear down.
I put the gear down below 150 kph. I did not get a green light on the right
side. The light tested OK. I asked the airboss if the gear was down.yes it was.
It was the end of the routine and I had a 10 minute flight back to Owen Sound
airport. Wondering about this, should I leave them, should I retract them,
I decided to retract them. At the airport I put the gear down, got 2 green
lights and landed uneventfully.
>
> We checked the gear visually and the micro switches. That is when we found out
they we wired backwards, but they were working fine. Left means right. I guess
they were facing backwards during installation. A puzzle.
>
> I flew the air show the next day and all was routine. except the weather.
>
> The following week I flew another short demo flight, put the gear down and no
right green light. Since I had good luck last time retracting and extending
I did the same. No green light on the right side again, meaning it was a downlock
problem on the left gear. The light out checked OK. The air pressure was
now just under 3. The emergency system was 5.5. The ground confirmed both gear
were down.
>
> Should I use the emergency system? I thought long and fast since there was not
a lot of fuel available and it was a very busy airport scene. I had sufficient
air pressure to extend the gear with the main system gear. Why then use an
alternate air system? To me, it was a downlock problem. Would the extra pressure
help that? I was not sure. So I decided to try and jar the gear into the
locked position first.
>
> I got the speed back to about 110 kph getting the nose up and angle gear forward,
then bounced the left gear on the runway ready for an immediate go-around.
I heard a snap caught the green light out of the corner of my eye and landed
with 2 green lights. Ground observers confirmed the left wheel moved back about
an inch or two, then snapped forward.
>
> I called Dennis, as I always do when I have a problem, and as usual, he had the
solution. Pull the actuators and send them to Jill at M14P Inc. So we did.
>
> We got the actuators back and finally got them installed. Not an easy job. The
gear swing is certainly a lot more violent now. It was a good thing that we
had one person holding each wing tip down on the jacks during the swing. We
havent bothered to rewire them yet and I have not flown the airplane yet.
>
> I spoke to Jill and the first thing she said was You dodged a bullet.
>
> Apparently, during the initial test, they blew the end off the left actuator
with only 300psi.
>
> I am so glad I did not use the emergency system and ram in all 850 psi. If the
end had blown off in the air what a mess.
>
> Jill put on the last remaining new actuator cap and they are looking for more
supply.
>
> So that is my story. Comments criticisms are most welcome. That is the way we
all learn.
>
> I dont have all the answers but I sure had some good luck this time.
>
> And yes we will be removing the actuators in 5 years for another overhaul.
>
>
>
>
>
>
Message 10
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| Subject: | Re: YAK-50 landing gear actuators overhaul time. |
Why is it that I cant think of something so simple!
Thanks Dennis
> On Jul 21, 2015, at 9:42 PM, A. Dennis Savarese <dsavarese0812@bellsouth.net>
wrote:
>
>
> Gordon, it's not necessary to rewire the gear lights. Simply unscrew the lamp
holder knurled nuts, slide the lamp holders back thru the instrument panel
and swap their positions. Dennis
>
> Sent from my iPhone
>
>> On Jul 21, 2015, at 5:24 PM, Gordon Price <gord@thedampub.ca> wrote:
>>
>>
>> It is time to share an adrenaline moment and some good luck in my YAK 50.
>>
>> As part of my airshow routine I do a final pass with the landing gear down.
I put the gear down below 150 kph. I did not get a green light on the right
side. The light tested OK. I asked the airboss if the gear was down.yes it was.
It was the end of the routine and I had a 10 minute flight back to Owen Sound
airport. Wondering about this, should I leave them, should I retract them,
I decided to retract them. At the airport I put the gear down, got 2 green
lights and landed uneventfully.
>>
>> We checked the gear visually and the micro switches. That is when we found
out they we wired backwards, but they were working fine. Left means right. I guess
they were facing backwards during installation. A puzzle.
>>
>> I flew the air show the next day and all was routine. except the weather.
>>
>> The following week I flew another short demo flight, put the gear down and no
right green light. Since I had good luck last time retracting and extending
I did the same. No green light on the right side again, meaning it was a downlock
problem on the left gear. The light out checked OK. The air pressure was
now just under 3. The emergency system was 5.5. The ground confirmed both gear
were down.
>>
>> Should I use the emergency system? I thought long and fast since there was
not a lot of fuel available and it was a very busy airport scene. I had sufficient
air pressure to extend the gear with the main system gear. Why then use an
alternate air system? To me, it was a downlock problem. Would the extra pressure
help that? I was not sure. So I decided to try and jar the gear into the
locked position first.
>>
>> I got the speed back to about 110 kph getting the nose up and angle gear forward,
then bounced the left gear on the runway ready for an immediate go-around.
I heard a snap caught the green light out of the corner of my eye and landed
with 2 green lights. Ground observers confirmed the left wheel moved back
about an inch or two, then snapped forward.
>>
>> I called Dennis, as I always do when I have a problem, and as usual, he had
the solution. Pull the actuators and send them to Jill at M14P Inc. So we did.
>>
>> We got the actuators back and finally got them installed. Not an easy job. The
gear swing is certainly a lot more violent now. It was a good thing that we
had one person holding each wing tip down on the jacks during the swing. We
havent bothered to rewire them yet and I have not flown the airplane yet.
>>
>> I spoke to Jill and the first thing she said was You dodged a bullet.
>>
>> Apparently, during the initial test, they blew the end off the left actuator
with only 300psi.
>>
>> I am so glad I did not use the emergency system and ram in all 850 psi. If
the end had blown off in the air what a mess.
>>
>> Jill put on the last remaining new actuator cap and they are looking for more
supply.
>>
>> So that is my story. Comments criticisms are most welcome. That is the way
we all learn.
>>
>> I dont have all the answers but I sure had some good luck this time.
>>
>> And yes we will be removing the actuators in 5 years for another overhaul.
>>
>>
>>
>>
>>
>>
>
>
>
>
>
Message 11
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| Subject: | Romanian IAR-823 |
I am selling my IAR823. It is a Romanian airforce trainer. 4 place, stick controls,
and it's aerobatic. 160 hrs on lycoming IO540.
Call me off list
Frank Surfas
530-622-4462
Located in northern ca.
Sent from my iPad
Message 12
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| Subject: | Re: YAK-50 landing gear actuators overhaul time. |
Hi Gordon,
I always listen carefully when the gear extends.
You can hear (or feel) the locking so I don't rely only upon the green
lights.
These Yak 50 actuators are one of the issues where the 50 is very
different compared to the Yak 52.
IMHO the system has been improved on the 52. The 52 has a separate small
locking actuator.
On the 50, the whole actuator moves for locking and unlocking. Tuning this
is not so easy.
The original Russian maintenance manual (DOSAAF 1979) says that you may
only have three complete swings using the emergency bottle.
After that, a complete overhaul of the landing gear is imperative.
I had to use it once when the main pressure feed line collapsed (between
the snot bottle and the cross).
The full unrestricted blow of the emergency bottle is indeed impressive.
BR,
Jan (Yak 50 F-AZUK).
On 22/07/15 04:01, "Gordon Price" <owner-yak-list-server@matronics.com on
behalf of gord@thedampub.ca> wrote:
>
>Why is it that I cant think of something so simple!
>
>Thanks Dennis
>
>> On Jul 21, 2015, at 9:42 PM, A. Dennis Savarese
>><dsavarese0812@bellsouth.net> wrote:
>>
>><dsavarese0812@bellsouth.net>
>>
>> Gordon, it's not necessary to rewire the gear lights. Simply unscrew
>>the lamp holder knurled nuts, slide the lamp holders back thru the
>>instrument panel and swap their positions. Dennis
>>
>> Sent from my iPhone
>>
>>> On Jul 21, 2015, at 5:24 PM, Gordon Price <gord@thedampub.ca> wrote:
>>>
>>>
>>> It is time to share an adrenaline moment and some good luck in my YAK
>>>50.
>>>
>>> As part of my airshow routine I do a final pass with the landing gear
>>>down. I put the gear down below 150 kph. I did not get a green light
>>>on the right side. The light tested OK. I asked the airboss if the
>>>gear was down.yes it was. It was the end of the routine and I had a
>>>10 minute flight back to Owen Sound airport. Wondering about this,
>>>should I leave them, should I retract them, I decided to retract them.
>>>At the airport I put the gear down, got 2 green lights and landed
>>>uneventfully.
>>>
>>> We checked the gear visually and the micro switches. That is when we
>>>found out they we wired backwards, but they were working fine. Left
>>>means right. I guess they were facing backwards during installation. A
>>>puzzle.
>>>
>>> I flew the air show the next day and all was routine. except the
>>>weather.
>>>
>>> The following week I flew another short demo flight, put the gear down
>>>and no right green light. Since I had good luck last time retracting
>>>and extending I did the same. No green light on the right side again,
>>>meaning it was a downlock problem on the left gear. The light out
>>>checked OK. The air pressure was now just under 3. The emergency
>>>system was 5.5. The ground confirmed both gear were down.
>>>
>>> Should I use the emergency system? I thought long and fast since
>>>there was not a lot of fuel available and it was a very busy airport
>>>scene. I had sufficient air pressure to extend the gear with the main
>>>system gear. Why then use an alternate air system? To me, it was a
>>>downlock problem. Would the extra pressure help that? I was not sure.
>>>So I decided to try and jar the gear into the locked position first.
>>>
>>> I got the speed back to about 110 kph getting the nose up and angle
>>>gear forward, then bounced the left gear on the runway ready for an
>>>immediate go-around. I heard a snap caught the green light out of
>>>the corner of my eye and landed with 2 green lights. Ground observers
>>>confirmed the left wheel moved back about an inch or two, then snapped
>>>forward.
>>>
>>> I called Dennis, as I always do when I have a problem, and as usual,
>>>he had the solution. Pull the actuators and send them to Jill at M14P
>>>Inc. So we did.
>>>
>>> We got the actuators back and finally got them installed. Not an easy
>>>job. The gear swing is certainly a lot more violent now. It was a good
>>>thing that we had one person holding each wing tip down on the jacks
>>>during the swing. We havent bothered to rewire them yet and I have
>>>not flown the airplane yet.
>>>
>>> I spoke to Jill and the first thing she said was You dodged a
>>>bullet.
>>>
>>> Apparently, during the initial test, they blew the end off the left
>>>actuator with only 300psi.
>>>
>>> I am so glad I did not use the emergency system and ram in all 850
>>>psi. If the end had blown off in the air what a mess.
>>>
>>> Jill put on the last remaining new actuator cap and they are looking
>>>for more supply.
>>>
>>> So that is my story. Comments criticisms are most welcome. That is
>>>the way we all learn.
>>>
>>> I dont have all the answers but I sure had some good luck this time.
>>>
>>> And yes we will be removing the actuators in 5 years for another
>>>overhaul.
>>>
>>>
>>>
>>>
>>>
>>>
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