Today's Message Index:
----------------------
1. 03:40 AM - Re: WON'T START (Rob Rowe)
2. 08:20 AM - Air (L129bs)
3. 08:39 AM - Re: Air (Anthony Savarese)
4. 08:58 AM - Re: Air (Byron Fox)
5. 10:44 AM - Re: Air (Walter Lannon)
6. 11:09 AM - Re: Air (Greg Wrobel)
7. 11:42 AM - Re: CJ6 gross weight (Robert Graves)
8. 11:53 AM - Re: Air (Mark Davis)
9. 01:02 PM - Re: Air (doug sapp)
10. 02:35 PM - Re: Air (A. Dennis Savarese)
11. 02:43 PM - Re: Air (Mark Davis)
12. 02:55 PM - Re: Air (A. Dennis Savarese)
13. 03:17 PM - Re: Air (doug sapp)
14. 04:41 PM - Re: Air (A. Dennis Savarese)
15. 04:41 PM - Re: Air (Walter Lannon)
16. 07:14 PM - Re: Air (A. Dennis Savarese)
17. 09:05 PM - Re: Yak 18T Jacks (weloveflying)
18. 09:09 PM - Re: Air (Walter Lannon)
19. 10:21 PM - Re: Air (Roger Kemp)
Message 1
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Also in the original manual it recommends, after cylinder priming, to wait for
the fuel to vapourise for 1-2 minutes in summer & 4-5 in winter before starting
from cold.
This pause makes it much more likely to fire up first time, as engines run on vapour
not liquid, and the supercharger priming point is a long way from the cylinder
heads.
Hence why pulling through per prime also helps as it provides a fresh impeller
surface area to vapourise fuel from.
Don't forget to prime the system side again just before start, to purge any bubbles
in the fuel system, as pressure carbs are akin to single point fuel injection
systems in being intolerant of even momentary fuel pressure drops.
IMHO this is the most common cause of failed starts and the cheapest to fix :-)
Rob R.
Bill1200 wrote:
> Update
>
> Followed the starting procedure found in "the Definitive Pilots Operating Handbook"
which is in part a translation of the Russian Handbook
>
> Basically, one prime pump for every 10 degrees below 100 degrees C
> So, this morning it was 68 degrees with an overnight low of 48
>
> 8 prime pumps while turning the prop, got in the plane, primed the system side
4 times, fired up immediately! Took 2 people but worth it
>
> I also followed one of the responders suggestion to gap the plugs to .018
>
> So, that would suggest to me that it is not a serious timing or bad component
problem, more likely a fuel/air mixture, cold engine issue
>
> Thanks to all
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=473321#473321
Message 2
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DQoNCg=
Message 3
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CJ or Yak?
Sent from my iPhone
> On Oct 4, 2017, at 11:19 AM, L129bs <l129bs@gmail.com> wrote:
>
> When I lower or raise the gear normally, the emergency air decreases as does
the normal air quantity???
> Any ideas?
>
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> -------- Original message --------
> From: Bill1200 <billdykes52@hotmail.com>
> Date:2017/10/02 1:52 PM (GMT-07:00)
> To: yak-list@matronics.com
> Cc:
> Subject: Yak-List: Re: WON'T START
>
> IQhaxr^jzZ("X,ZIJr*'!y:0ZwE,jwfff-0kx&DH %SPjg rz{Zi^&lZ+k!+k&j',rcM $!$ u(~hj',fhmHj',rB{kyjy2*.
z.1m)-0kx&'
.
Message 4
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If yours is a CJ, the check valves on the starboard firewall need to be serv
iced.
Blitz Fox
415-307-2405
> On Oct 4, 2017, at 8:19 AM, L129bs <l129bs@gmail.com> wrote:
>
> When I lower or raise the gear normally, the emergency air decreases as do
es the normal air quantity???
> Any ideas?
>
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> -------- Original message --------
> From: Bill1200 <billdykes52@hotmail.com>
> Date:2017/10/02 1:52 PM (GMT-07:00)
> To: yak-list@matronics.com
> Cc:
> Subject: Yak-List: Re: WON'T START
>
Message 5
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Good call Blitz.
A drop in Emerg. press. would suggest internal leakage in the charge syste
m check valve on the upper RH firewall.
Walt
From: Byron Fox
Sent: Wednesday, October 04, 2017 8:57 AM
Subject: Re: Yak-List: Air
If yours is a CJ, the check valves on the starboard firewall need to be ser
viced.
Blitz Fox
415-307-2405
On Oct 4, 2017, at 8:19 AM, L129bs <l129bs@gmail.com> wrote:
When I lower or raise the gear normally, the emergency air decreases as d
oes the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52@hotmail.com>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list@matronics.com
Cc:
Subject: Yak-List: Re: WON'T START
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Message 6
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On the CJ, rebuild or replace the check valve on the right side of
firewall.
On Oct 4, 2017 11:24 AM, "L129bs" <l129bs@gmail.com> wrote:
> When I lower or raise the gear normally, the emergency air decreases as
> does the normal air quantity???
> Any ideas?
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> -------- Original message --------
> From: Bill1200 <billdykes52@hotmail.com>
> Date:2017/10/02 1:52 PM (GMT-07:00)
> To: yak-list@matronics.com
> Cc:
> Subject: Yak-List: Re: WON'T START
>
>
Message 7
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| Subject: | Re: CJ6 gross weight |
Thanks Walter and Gary that's the way I read it also. I was hoping some of the
people that are using different weight would come up with something.
Sent from my iPhone
> On Oct 3, 2017, at 9:34 PM, ggg6@att.net wrote:
>
>
> All the calculations I have done right from the Chinese manual converted to pounds
the max gross take off weight is 3080lbs. Gary. CJ N22YK
>
> Sent from my iPad
>
>> On Oct 3, 2017, at 17:18, Flibob <Flibob@att.net> wrote:
>>
>>
>> What is the correct gross weight for the CJ? I have been using 3080 as the conversion
from kilograms in my Chinese manual. I just re-done my weight and balance
and several other users are using 3200 lbs. I have also heard of people
using 3500 pounds. Seems to me like comic book math and Moondust but seriously
if it is a higher number it would certainly make life a lot easier any answers?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=473314#473314
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
.
Message 8
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The aircraft having the issue is a YAK-52. Do they have the same check
valve as the Nanchang?
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Greg Wrobel
Sent: Wednesday, October 04, 2017 12:08 PM
Subject: Re: Yak-List: Air
On the CJ, rebuild or replace the check valve on the right side of
firewall.
On Oct 4, 2017 11:24 AM, "L129bs" <l129bs@gmail.com> wrote:
When I lower or raise the gear normally, the emergency air decreases as
does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52@hotmail.com>
Date:2017/10/02 1:52 PM (GMT-07:00)
Cc:
Subject: Yak-List: Re: WON'T START
Message 9
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The Yak 52 uses a different check valve than the CJ6.
We recently developed a conversion to allow the CJ6 check valve to be used
on the 52. The CJ6 check valves are lower cost and are very easy to
maintain, Roger Kemp converted his 52 to CJ6 check valves recently.
Doug
On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis <markdavis@wbsnet.org> wrote:
> The aircraft having the issue is a YAK-52. Do they have the same check
> valve as the Nanchang?
>
>
> *From:* owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@
> matronics.com] *On Behalf Of *Greg Wrobel
> *Sent:* Wednesday, October 04, 2017 12:08 PM
> *To:* yak-list@matronics.com
> *Subject:* Re: Yak-List: Air
>
>
> On the CJ, rebuild or replace the check valve on the right side of
> firewall.
>
>
> On Oct 4, 2017 11:24 AM, "L129bs" <l129bs@gmail.com> wrote:
>
> When I lower or raise the gear normally, the emergency air decreases as
> does the normal air quantity???
> Any ideas?
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> -------- Original message --------
> From: Bill1200 <billdykes52@hotmail.com>
> Date:2017/10/02 1:52 PM (GMT-07:00)
> To: yak-list@matronics.com
> Cc:
> Subject: Yak-List: Re: WON'T START
>
Message 10
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Icould be wrong, but I believe Doc Kemp converted 2 of the 5 Yak 52
check valves over to CJ check valves. Those two were on the firewall on
each side of the pressure relief valve. The other 3 are:
-2 under thefloor in the rear cockpit and connectto the input side of
the Yak 52 brake reducing valve; one side for the emergency system and
one for the main system. (real pain in the rear to get to. So unlikely
they will be changed unless a problem existed.)
-1 at the input of the external air fill port which allows airflow to
the emergency air tank from the external air fill port.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 4:01 PM, doug sapp wrote:
> The Yak 52 uses a different check valve than the CJ6.
>
> We recently developed a conversion to allow the CJ6 check valve to be
> used on the 52. The CJ6 check valves are lower cost and are very easy
> to maintain, Roger Kemp converted his 52 to CJ6 check valves recently.
>
> Doug
>
> On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis <markdavis@wbsnet.org
> <mailto:markdavis@wbsnet.org>> wrote:
>
> The aircraft having the issue is a YAK-52. Do they have the same
> check valve as the Nanchang?
>
> *From:*owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>
> [mailto:owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>] *On Behalf Of *Greg
> Wrobel
> *Sent:* Wednesday, October 04, 2017 12:08 PM
> *To:* yak-list@matronics.com <mailto:yak-list@matronics.com>
> *Subject:* Re: Yak-List: Air
>
> On the CJ, rebuild or replace the check valve on the right side of
> firewall.
>
> On Oct 4, 2017 11:24 AM, "L129bs" <l129bs@gmail.com
> <mailto:l129bs@gmail.com>> wrote:
>
> When I lower or raise the gear normally, the emergency air
> decreases as does the normal air quantity???
> Any ideas?
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> -------- Original message --------
> From: Bill1200 <billdykes52@hotmail.com
> <mailto:billdykes52@hotmail.com>>
> Date:2017/10/02 1:52 PM (GMT-07:00)
> To: yak-list@matronics.com <mailto:yak-list@matronics.com>
> Cc:
> Subject: Yak-List: Re: WON'T START
>
>
Message 11
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YAK 52. The issue he's having is that he's depleting air from the emergency system
when actuating the landing gear with the emergency air system CLOSED and
normal pressures on main system.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Anthony Savarese
Sent: Wednesday, October 04, 2017 9:39 AM
Subject: Re: Yak-List: Air
--> <dsavarese0812@bellsouth.net>
CJ or Yak?
Sent from my iPhone
> On Oct 4, 2017, at 11:19 AM, L129bs <l129bs@gmail.com> wrote:
>
> When I lower or raise the gear normally, the emergency air decreases as does
the normal air quantity???
> Any ideas?
>
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> -------- Original message --------
> From: Bill1200 <billdykes52@hotmail.com>
> Date:2017/10/02 1:52 PM (GMT-07:00)
> To: yak-list@matronics.com
> Cc:
> Subject: Yak-List: Re: WON'T START
>
> IQhaxr^jzZ("X,Z
> IJr*'!y:0ZwE,jwfff
0kx&DH %SPjg rz{Zi^&lZ+k!+k&j',rcM $!$ u(~hj',fhmHj',rB{kyjy2*. z.1m
)
0kx&'
.
Message 12
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|
Is this a totally stock Yak 52 or has there been any modifications to
the pneumatic system?
Did the problem just occur or did it happen after doing a gear
retraction/extension test including extending the gear with the
emergency system?
If the air is depletingon both main and emergency sidesusing the gear,
what happens to both side when you move the flaps up and down several times?
What happens if you squeeze the brakes several times until you can
physically see the main air side going down?
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 5:42 PM, Mark Davis wrote:
>
> YAK 52. The issue he's having is that he's depleting air from the emergency
system when actuating the landing gear with the emergency air system CLOSED and
normal pressures on main system.
>
> Mark
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Anthony Savarese
> Sent: Wednesday, October 04, 2017 9:39 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Air
>
> --> <dsavarese0812@bellsouth.net>
>
> CJ or Yak?
>
> Sent from my iPhone
>
>> On Oct 4, 2017, at 11:19 AM, L129bs <l129bs@gmail.com> wrote:
>>
>> When I lower or raise the gear normally, the emergency air decreases as does
the normal air quantity???
>> Any ideas?
>>
>>
>>
>> Sent from my Samsung Galaxy smartphone.
>>
>>
>> -------- Original message --------
>> From: Bill1200 <billdykes52@hotmail.com>
>> Date:2017/10/02 1:52 PM (GMT-07:00)
>> To: yak-list@matronics.com
>> Cc:
>> Subject: Yak-List: Re: WON'T START
>>
>> IQhaxr^jzZ("X,Z
>> IJr*'!y:0ZwE,jwfff
> 0kx&DH %SPjg rz{Zi^&lZ+k!+k&j',rcM $!$ u(~hj',fhmHj',rB{kyjy2*. z.1m
> )
> 0kx&'
>
>
> .
>
>
Message 13
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Dennis,
My records show that he purchased 6 check valves, rather he installed them
all I do not know. I do recall that he called back needing a 90 degree
fitting for one location.
Doug
On Wed, Oct 4, 2017 at 2:34 PM, A. Dennis Savarese <
dsavarese0812@bellsouth.net> wrote:
> dsavarese0812@bellsouth.net>
>
> Icould be wrong, but I believe Doc Kemp converted 2 of the 5 Yak 52 check
> valves over to CJ check valves. Those two were on the firewall on each side
> of the pressure relief valve. The other 3 are:
> -2 under thefloor in the rear cockpit and connectto the input side of the
> Yak 52 brake reducing valve; one side for the emergency system and one for
> the main system. (real pain in the rear to get to. So unlikely they will
> be changed unless a problem existed.)
> -1 at the input of the external air fill port which allows airflow to the
> emergency air tank from the external air fill port.
> Dennis
>
> A. Dennis Savarese
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
>
> On 10/4/2017 4:01 PM, doug sapp wrote:
>
>> The Yak 52 uses a different check valve than the CJ6.
>>
>> We recently developed a conversion to allow the CJ6 check valve to be
>> used on the 52. The CJ6 check valves are lower cost and are very easy to
>> maintain, Roger Kemp converted his 52 to CJ6 check valves recently.
>>
>> Doug
>>
>> On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis <markdavis@wbsnet.org
>> <mailto:markdavis@wbsnet.org>> wrote:
>>
>> The aircraft having the issue is a YAK-52. Do they have the same
>> check valve as the Nanchang?
>>
>> *From:*owner-yak-list-server@matronics.com
>> <mailto:owner-yak-list-server@matronics.com>
>> [mailto:owner-yak-list-server@matronics.com
>> <mailto:owner-yak-list-server@matronics.com>] *On Behalf Of *Greg
>> Wrobel
>> *Sent:* Wednesday, October 04, 2017 12:08 PM
>> *To:* yak-list@matronics.com <mailto:yak-list@matronics.com>
>> *Subject:* Re: Yak-List: Air
>>
>> On the CJ, rebuild or replace the check valve on the right side of
>> firewall.
>>
>> On Oct 4, 2017 11:24 AM, "L129bs" <l129bs@gmail.com
>> <mailto:l129bs@gmail.com>> wrote:
>>
>> When I lower or raise the gear normally, the emergency air
>> decreases as does the normal air quantity???
>> Any ideas?
>>
>>
>>
>> Sent from my Samsung Galaxy smartphone.
>>
>>
>>
>> -------- Original message --------
>> From: Bill1200 <billdykes52@hotmail.com
>> <mailto:billdykes52@hotmail.com>>
>> Date:2017/10/02 1:52 PM (GMT-07:00)
>> To: yak-list@matronics.com <mailto:yak-list@matronics.com>
>> Cc:
>> Subject: Yak-List: Re: WON'T START
>>
>>
>>
>
>
Message 14
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Doug,
I know the Yak 50 uses the same Chinese check valvestoo. The 90 deg
fittingis used by bothcheck valves on either side of the pop off valve
on the firewall of the Yak 52.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 6:16 PM, doug sapp wrote:
> Dennis,
> My records show that he purchased 6 check valves, rather he installed
> them all I do not know. I do recall that he called back needing a 90
> degree fitting for one location.
>
> Doug
>
> On Wed, Oct 4, 2017 at 2:34 PM, A. Dennis Savarese
> <dsavarese0812@bellsouth.net <mailto:dsavarese0812@bellsouth.net>> wrote:
>
> <dsavarese0812@bellsouth.net <mailto:dsavarese0812@bellsouth.net>>
>
> Icould be wrong, but I believe Doc Kemp converted 2 of the 5 Yak
> 52 check valves over to CJ check valves. Those two were on the
> firewall on each side of the pressure relief valve. The other 3 are:
> -2 under thefloor in the rear cockpit and connectto the input side
> of the Yak 52 brake reducing valve; one side for the emergency
> system and one for the main system. (real pain in the rear to get
> to. So unlikely they will be changed unless a problem existed.)
> -1 at the input of the external air fill port which allows airflow
> to the emergency air tank from the external air fill port.
> Dennis
>
> A. Dennis Savarese
> 334-546-8182 <tel:334-546-8182>(mobile)
> www.yak-52.com <http://www.yak-52.com>
> Skype - Yakguy1
>
> On 10/4/2017 4:01 PM, doug sapp wrote:
>
> The Yak 52 uses a different check valve than the CJ6.
>
> We recently developed a conversion to allow the CJ6 check
> valve to be used on the 52. The CJ6 check valves are lower
> cost and are very easy to maintain, Roger Kemp converted his
> 52 to CJ6 check valves recently.
>
> Doug
>
> On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis
> <markdavis@wbsnet.org <mailto:markdavis@wbsnet.org>
> <mailto:markdavis@wbsnet.org <mailto:markdavis@wbsnet.org>>>
> wrote:
>
> The aircraft having the issue is a YAK-52. Do they have
> the same
> check valve as the Nanchang?
>
> *From:*owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>
> <mailto:owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>>
> [mailto:owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>
> <mailto:owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>>] *On Behalf Of *Greg
> Wrobel
> *Sent:* Wednesday, October 04, 2017 12:08 PM
> *To:* yak-list@matronics.com
> <mailto:yak-list@matronics.com> <mailto:yak-list@matronics.com
> <mailto:yak-list@matronics.com>>
> *Subject:* Re: Yak-List: Air
>
> On the CJ, rebuild or replace the check valve on the right
> side of
> firewall.
>
> On Oct 4, 2017 11:24 AM, "L129bs" <l129bs@gmail.com
> <mailto:l129bs@gmail.com>
> <mailto:l129bs@gmail.com <mailto:l129bs@gmail.com>>> wrote:
>
> When I lower or raise the gear normally, the emergency air
> decreases as does the normal air quantity???
> Any ideas?
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> -------- Original message --------
> From: Bill1200 <billdykes52@hotmail.com
> <mailto:billdykes52@hotmail.com>
> <mailto:billdykes52@hotmail.com
> <mailto:billdykes52@hotmail.com>>>
> Date:2017/10/02 1:52 PM (GMT-07:00)
> To: yak-list@matronics.com <mailto:yak-list@matronics.com>
> <mailto:yak-list@matronics.com <mailto:yak-list@matronics.com>>
> Cc:
> Subject: Yak-List: Re: WON'T START
>
>
> ===================================
> List" rel="noreferrer"
> target="_blank">http://www.matronics.com/Navigator?Yak-List
> ===================================
> FORUMS -
> eferrer" target="_blank">http://forums.matronics.com
> ===================================
> WIKI -
> errer" target="_blank">http://wiki.matronics.com
> ===================================
> b Site -
> -Matt Dralle, List Admin.
> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
> ===================================
>
>
Message 15
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Hmmm;
If this were a CJ the (presumably) offending check valve is the one that
allows the EM tank to be charged in the SYSTEM CLOSED position as it must
be. Normally
this is done in conjunction with charging the main air tank with that system
OPEN but can also be done independent of the main tank with the main system
closed.
I take advantage of that feature to maintain a mostly N2 charge in the EM
tank.
BUT this is a not a CJ and I have no knowledge of the Yak 52. Have heard
that the EM tank is charged separately from the main. If so, is there an
on-board charging circuit built into the aircraft that you hook up to? Or
do you remove the tank?
If an on-board circuit then chances are you have the same (though Russian
style) check valve - non return as the CJ somewhere in the system.
Walt
From: Mark Davis
Sent: Wednesday, October 04, 2017 2:42 PM
Subject: RE: Yak-List: Air
YAK 52. The issue he's having is that he's depleting air from the emergency
system when actuating the landing gear with the emergency air system CLOSED
and normal pressures on main system.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Anthony Savarese
Sent: Wednesday, October 04, 2017 9:39 AM
Subject: Re: Yak-List: Air
--> <dsavarese0812@bellsouth.net>
CJ or Yak?
Sent from my iPhone
> On Oct 4, 2017, at 11:19 AM, L129bs <l129bs@gmail.com> wrote:
>
> When I lower or raise the gear normally, the emergency air decreases as
> does the normal air quantity???
> Any ideas?
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> -------- Original message --------
> From: Bill1200 <billdykes52@hotmail.com>
> Date:2017/10/02 1:52 PM (GMT-07:00)
> To: yak-list@matronics.com
> Cc:
> Subject: Yak-List: Re: WON'T START
>
> IQhaxr^jzZ("X,Z
> IJr*'!y:0ZwE,jwfff
0kx&DH %SPg rz{Zi^&lZ+k!+k&j',rcM $!$
u(~hj',fhmHj',rB{kyjy2*.
z.1m
)
0kx&'
.
---
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Message 16
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Essentially Walt, there is a Y fitting on the external air fill port.
One side, with a check valve, fills the emergency tank and the other leg
of the Y fills the main tank. Once the emergency tank is filled from the
external air fill port, it's filled. The only way it can go down is to
open one of the two emergency air valves or there is a leak. There
simply is no common connection between the main and emergency systems
without one of the two emergency air valve being open.
If anyone is thinking that it could be one of the instruments leaking
between the two sides, it's impossible because behind the common
faceplate of the instrument are two separate instrument housings with no
connection between the two.
The emergency air system on the 52 is completely isolated from the main
air system. That'sthe reason I asked the questions that I did earlier.
Once I get the answers to the questions, I'll try diagnosing the problem
further. Hopefully I'll be able to help.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 7:39 PM, Walter Lannon wrote:
>
> Hmmm;
>
> If this were a CJ the (presumably) offending check valve is the one
> that allows the EM tank to be charged in the SYSTEM CLOSED position as
> it must be. Normally
> this is done in conjunction with charging the main air tank with that
> system OPEN but can also be done independent of the main tank with the
> main system closed.
> I take advantage of that feature to maintain a mostly N2 charge in the
> EM tank.
>
> BUT this is a not a CJ and I have no knowledge of the Yak 52. Have
> heard that the EM tank is charged separately from the main. If so, is
> there an on-board charging circuit built into the aircraft that you
> hook up to? Or do you remove the tank?
>
> If an on-board circuit then chances are you have the same (though
> Russian style) check valve - non return as the CJ somewhere in the
> system.
>
> Walt
>
>
> From: Mark Davis
> Sent: Wednesday, October 04, 2017 2:42 PM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: Air
>
>
> YAK 52. The issue he's having is that he's depleting air from the
> emergency system when actuating the landing gear with the emergency
> air system CLOSED and normal pressures on main system.
>
> Mark
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Anthony
> Savarese
> Sent: Wednesday, October 04, 2017 9:39 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Air
>
> --> <dsavarese0812@bellsouth.net>
>
> CJ or Yak?
>
> Sent from my iPhone
>
>> On Oct 4, 2017, at 11:19 AM, L129bs <l129bs@gmail.com> wrote:
>>
>> When I lower or raise the gear normally, the emergency air decreases
>> as does the normal air quantity???
>> Any ideas?
>>
>>
>>
>> Sent from my Samsung Galaxy smartphone.
>>
>>
>> -------- Original message --------
>> From: Bill1200 <billdykes52@hotmail.com>
>> Date:2017/10/02 1:52 PM (GMT-07:00)
>> To: yak-list@matronics.com
>> Cc:
>> Subject: Yak-List: Re: WON'T START
>>
>> IQhaxr^jzZ("X,Z
>> IJr*'!y:0ZwE,jwfff
> 0kx&DH %SPg
> rz{Zi^&lZ+k!+k&j',rcM $!$
> u(~hj',fhmHj',rB{kyjy2*.
> z.1m
> )
> 0kx&'
>
>
> .
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>
Message 17
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| Subject: | Re: Yak 18T Jacks |
Have you tried getting parts from companies which offer metal machining services, like this one (http://www.powerjackmotion.com/product-category/metal-maching-service/) for example? The said company has lift systems as one of their specialties, but most of these are for automation or motion control; however, they also offer metal machining services which, I think, you can leverage to get a jack made for you according to your desired measurement.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=473358#473358
Message 18
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Yes --- "or if there is a leak". That check valve is a potential leak
source.
Whether it is the culprit in this case I certainly don't know but it seems
to fit the description and should be checked out.
Walt
-----Original Message-----
From: A. Dennis Savarese
Sent: Wednesday, October 04, 2017 7:11 PM
Subject: Re: Yak-List: Air
<dsavarese0812@bellsouth.net>
Essentially Walt, there is a Y fitting on the external air fill port.
One side, with a check valve, fills the emergency tank and the other leg
of the Y fills the main tank. Once the emergency tank is filled from the
external air fill port, it's filled. The only way it can go down is to
open one of the two emergency air valves or there is a leak. There
simply is no common connection between the main and emergency systems
without one of the two emergency air valve being open.
If anyone is thinking that it could be one of the instruments leaking
between the two sides, it's impossible because behind the common
faceplate of the instrument are two separate instrument housings with no
connection between the two.
The emergency air system on the 52 is completely isolated from the main
air system. That'sthe reason I asked the questions that I did earlier.
Once I get the answers to the questions, I'll try diagnosing the problem
further. Hopefully I'll be able to help.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 7:39 PM, Walter Lannon wrote:
>
> Hmmm;
>
> If this were a CJ the (presumably) offending check valve is the one that
> allows the EM tank to be charged in the SYSTEM CLOSED position as it must
> be. Normally
> this is done in conjunction with charging the main air tank with that
> system OPEN but can also be done independent of the main tank with the
> main system closed.
> I take advantage of that feature to maintain a mostly N2 charge in the EM
> tank.
>
> BUT this is a not a CJ and I have no knowledge of the Yak 52. Have heard
> that the EM tank is charged separately from the main. If so, is there an
> on-board charging circuit built into the aircraft that you hook up to?
> Or do you remove the tank?
>
> If an on-board circuit then chances are you have the same (though Russian
> style) check valve - non return as the CJ somewhere in the system.
>
> Walt
>
>
> From: Mark Davis
> Sent: Wednesday, October 04, 2017 2:42 PM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: Air
>
>
> YAK 52. The issue he's having is that he's depleting air from the
> emergency system when actuating the landing gear with the emergency air
> system CLOSED and normal pressures on main system.
>
> Mark
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Anthony Savarese
> Sent: Wednesday, October 04, 2017 9:39 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Air
>
> --> <dsavarese0812@bellsouth.net>
>
> CJ or Yak?
>
> Sent from my iPhone
>
>> On Oct 4, 2017, at 11:19 AM, L129bs <l129bs@gmail.com> wrote:
>>
>> When I lower or raise the gear normally, the emergency air decreases as
>> does the normal air quantity???
>> Any ideas?
>>
>>
>>
>> Sent from my Samsung Galaxy smartphone.
>>
>>
>> -------- Original message --------
>> From: Bill1200 <billdykes52@hotmail.com>
>> Date:2017/10/02 1:52 PM (GMT-07:00)
>> To: yak-list@matronics.com
>> Cc:
>> Subject: Yak-List: Re: WON'T START
>>
>> IQhaxr^jzZ("X,Z
>> IJr*'!y:0ZwE,jwfff
> 0kx&DH %SP rz{Zi^&lZ+k!+k&j',rcM $!$ u(~hj',fhmHj',rB{kyjy2*. z.1m
> )
> 0kx&'
>
>
> .
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>
Message 19
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I stopped at the Firewall conversion. Works fine. My leak was on the system s
ide at the firewall. I plan to change the FCP shut off valves out as soon as
I have time.
Had a family medical issue that grounded me for the summer. System has sat f
or approx. 3 months. The system had lost 1 ATM over 3 months as of last Sund
ay.
Doc
Sent from my iPad
> On Oct 4, 2017, at 5:16 PM, doug sapp <dougsappllc@gmail.com> wrote:
>
> Dennis,
> My records show that he purchased 6 check valves, rather he installed them
all I do not know. I do recall that he called back needing a 90 degree fit
ting for one location.
>
> Doug
>
>> On Wed, Oct 4, 2017 at 2:34 PM, A. Dennis Savarese <dsavarese0812@bellsou
th.net> wrote:
outh.net>
>>
>> Icould be wrong, but I believe Doc Kemp converted 2 of the 5 Yak 52 check
valves over to CJ check valves. Those two were on the firewall on each side
of the pressure relief valve. The other 3 are:
>> -2 under thefloor in the rear cockpit and connectto the input side of the
Yak 52 brake reducing valve; one side for the emergency system and one for t
he main system. (real pain in the rear to get to. So unlikely they will be c
hanged unless a problem existed.)
>> -1 at the input of the external air fill port which allows airflow to the
emergency air tank from the external air fill port.
>> Dennis
>>
>> A. Dennis Savarese
>> 334-546-8182 (mobile)
>> www.yak-52.com
>> Skype - Yakguy1
>>
>>> On 10/4/2017 4:01 PM, doug sapp wrote:
>>> The Yak 52 uses a different check valve than the CJ6.
>>>
>>> We recently developed a conversion to allow the CJ6 check valve to be us
ed on the 52. The CJ6 check valves are lower cost and are very easy to main
tain, Roger Kemp converted his 52 to CJ6 check valves recently.
>>>
>>> Doug
>>>
>>> On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis <markdavis@wbsnet.org <mailt
o:markdavis@wbsnet.org>> wrote:
>>>
>>> The aircraft having the issue is a YAK-52. Do they have the same
>>> check valve as the Nanchang?
>>>
>>> *From:*owner-yak-list-server@matronics.com
>>> <mailto:owner-yak-list-server@matronics.com>
>>> [mailto:owner-yak-list-server@matronics.com
>>> <mailto:owner-yak-list-server@matronics.com>] *On Behalf Of *Greg
>>> Wrobel
>>> *Sent:* Wednesday, October 04, 2017 12:08 PM
>>> *To:* yak-list@matronics.com <mailto:yak-list@matronics.com>
>>> *Subject:* Re: Yak-List: Air
>>>
>>> On the CJ, rebuild or replace the check valve on the right side of
>>> firewall.
>>>
>>> On Oct 4, 2017 11:24 AM, "L129bs" <l129bs@gmail.com
>>> <mailto:l129bs@gmail.com>> wrote:
>>>
>>> When I lower or raise the gear normally, the emergency air
>>> decreases as does the normal air quantity???
>>> Any ideas?
>>>
>>>
>>>
>>> Sent from my Samsung Galaxy smartphone.
>>>
>>>
>>>
>>> -------- Original message --------
>>> From: Bill1200 <billdykes52@hotmail.com
>>> <mailto:billdykes52@hotmail.com>>
>>> Date:2017/10/02 1:52 PM (GMT-07:00)
>>> To: yak-list@matronics.com <mailto:yak-list@matronics.com>
>>> Cc:
>>> Subject: Yak-List: Re: WON'T START
>>>
>>>
>>
>> =========================
>> List" rel="noreferrer" target="_blank">http://www.matronics.com/Navig
ator?Yak-List
>> =========================
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
>> =========================
>> WIKI -
>> errer" target="_blank">http://wiki.matronics.com
>> =========================
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer" target="_blank">http://www.matronics.com/contributio
n
>> =========================
>>
>>
>>
>
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