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jbsoar(at)gmail.com
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 Posted: Mon Jan 25, 2016 10:08 pm Post subject: Air charging valve? |
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Spanners? Doesn't the Schrader valve thread on with a knurled nut? The yellow-painted brass cap comes off with a 3/8 wrench, as I recall. Or am I confused again?john b
On Mon, Jan 25, 2016 at 10:30 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
| Quote: | --> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
I forgot to mention that the other disadvantage of a schrader valve is that you need spanners to operate it. The quarter turn Russian one, you don't!
Chris
Read this topic online here:
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jbsoar(at)gmail.com
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| Posted: Tue Jan 26, 2016 12:40 am Post subject: Air charging valve? |
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Can anyone shed some light on the oil dilution system? For cold stating, one would guess. Is it normally used in the temperate climates?john b
On Mon, Jan 25, 2016 at 11:05 PM, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Spanners? Doesn't the Schrader valve thread on with a knurled nut? The yellow-painted brass cap comes off with a 3/8 wrench, as I recall. Or am I confused again?john b
On Mon, Jan 25, 2016 at 10:30 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
| Quote: | --> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
I forgot to mention that the other disadvantage of a schrader valve is that you need spanners to operate it. The quarter turn Russian one, you don't!
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452289#452289
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Etienne Verhellen
Joined: 13 Apr 2007
Posts: 141
Location: Belgium
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marty.jpm(at)gmail.com
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dsavarese0812(at)bellsout
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| Posted: Tue Jan 26, 2016 5:07 am Post subject: Air charging valve? |
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If you install this Schrader valve on the external air fill port cover, you won't need to use a spanner to open it up. All one needs is a standard aviation coupler that screws on to the end of the Schrader valve. This coupler is the same one that is used to fill struts with nitrogen on general aviation aircraft.
http://www.skygeek.com/schrader-6116-high-pressure-inflating-connection.html?utm_source=googlebase&utm_medium=shoppingengine&utm_content=schrader-6116-high-pressure-inflating-connection&utm_campaign=froogle&gclid=CLmBt7y_x8oCFYEmHwodEKwP9g
To install a Schrader valve on the external air fill port cover, simply drill the center of the cover and tap it with a 1/8 NPT tap. Remove the valve core when installed. Reinstall the cover on the airplane making sure the rubber grommet remains in place. If you need to use the Russian adapter, simply remove the cover from the fuselage. Attached is a photo of one installed on the external air fill port cover. (with the cap on the Schrader valve).
And here's the actual Schrader valve used.
http://www.amazon.com/Forney-75543-Valve-Schraeder-8-Inch/dp/B003X5Q8LY/ref=sr_1_3?s=power-hand-tools&ie=UTF8&qid=1453812935&sr=1-3&keywords=schrader+valve
Dennis
From: Looigi <cdoburton(at)gmail.com>
To: yak-list(at)matronics.com
Sent: Tuesday, January 26, 2016 12:30 AM
Subject: Re: Air charging valve?
--> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
I forgot to mention that the other disadvantage of a schrader valve is that you need spanners to operate it. The quarter turn Russian one, you don't!
Chris
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http://forums.matronics.com/viewtopic.php?p=452289#452289
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dsavarese0812(at)bellsout
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| Posted: Tue Jan 26, 2016 5:32 am Post subject: Air charging valve? |
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Seems to me your thinking is spot on, with one additional piece of info. Some M14 and Huosai powered aircraft will start with Nitrogen in the main air system. Some won't. My Yak was one that would not start with Nitrogen in the main air system. Been there, done that, got the T shirt several times. Although I can't be certain, it may have been caused by the air start distributor timing allowing too much Nitrogen to be injected into the cylinder, thus causing an air/fuel ratio that was not conducive to combustion. Thus, having the Schrader valve on the external air fill port cover one could attach a Nitrogen bottle which can be found in many GA maintenance shops.
I made another post to this thread with a photo of a Schrader valve on the external air fill port along with a link to the coupler which attaches to the Schrader valve and a link to the actual Schrader valve used. The valve core is always removed because it is unnecessary.
Dennis
From: John B <jbsoar(at)gmail.com>
To: Yak-List Digest Server <yak-list(at)matronics.com>
Sent: Monday, January 25, 2016 9:34 PM
Subject: Re: Re: Air charging valve?
Air pressure inlet questions.
This thread is getting quite interesting, and I thank all of you for your contributions. There are tens of thousands of hours of experience on this forum, and it is nice that this knowledge is being shared.
Most of twenty years ago, I got a ride in a CJ-6. Of course, I squeezed the bicycle brake handle that was mounted on the control stick, and was rewarded with a whoosh of air, as the brakes cycled. Interesting. The engine was easy to start, and the airplane flew well. I casually wondered why Western airplanes didn't use a similar air starting system.
Most of five years ago, at the Casa Grande airport in Arizona, I spoke with a foreign pilot who was ferrying a Sukhoi. He had stopped for fuel, and then ran the airplane out of air while trying to start it. He was in luck, as, at the time, there was a scuba diving school in town that was open. Somebody took him to the scuba store, and, after messing around with a scuba tank, he started the engine and departed.
During the two hour sit in the pilot's lounge, I learned that oxygen couldn't be used, as it created an explosive mixture, and I was told that nitrogen wouldn't work, as nitrogen would tend to discourage combustion.
Now, after buying a Yak 55M, I'd like to operate the airplane safely, and in a reliable manner. No Oxygen, for obvious reasons. I did not know that Nitrogen could be used. The Yak I bought has the original Russian quarter turn fitting behind the wing on the left side of the fuselage. This past weekend, I looked at a CJ-6 that had a similar fitting, except that someone had modified it with the installation of a Schreader valve, presumably of the high-pressure type. The owner had a scuba tank in his hangar with the brass thread-on Schreader valve attached via a hose. This set-up might provide two advantages: 1. If one gets stuck away from one's own scuba tank, they might get their airplane started via a borrowed Nitrogen bottle, which is common at most sizable airports. 2. The original Russian fitting has a dust cap that is held on with a cable lanyard. With a Schreader valve, one wouldn't have to use, and leave off, this cap. Thus far, the original Russian set-up has been working fine.
Folks, if my thinking is defective, please educate me. I appreciate your feedback!
John B
Phoenix, AZ
On Mon, Jan 25, 2016 at 1:08 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
| Quote: | --> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
Pure oxygen under high pressure will spontaneously combust when exposed to grease and oils without any other source of ignition.
When we replenish aircraft oxygen systems at work (I am an Aircraft Engineer) we make sure we have clean hands, clean overalls and we use a dedicated set of clean tools that are only used on oxygen systems. Seriously guys, yes you are sitting in a room full of it, but under high pressure oxygen is lethal. To relate this back to the topic on hand, I will put it bluntly; ONLY FILL YOUR YAK AIR SYSTEM WITH OXYGEN IF YOU WANT TO DIE!!
Schrader valves are commonly used on commercial aircraft for applications far exceeding the pressures we are talking about here, but they are these type: https://www.schraderinternational.com/Products/Product-Folder/NA-High-Pressure-Valves-and-Connectors?sc_lang=en-US-AP
My question is, what is wrong with the Russian type os fitting that comes fitted to the aircraft as standard? I personally think the design is very clever and reliable. I looked at getting some machined up a while ago and the price was very reasonable at $100 or so each. As it happened, I was given one, but if enough people want one, I will get some made.
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452269#452269
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markdavis(at)wbsnet.org
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| Posted: Tue Jan 26, 2016 7:40 am Post subject: Air charging valve? |
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I had the same starting issue with mine on pure nitrogen after the system had been dumped for maintenance.  I suspected the pure nitrogen was the issue and pulled multiple blades to clear the cylinders, but could then only get a muffled pop on the first hit then nothing.  I swapped plugs and tried all the usual stuff. Dave Hilker flew over to try to help me figure it out. He suggested opening the throttle more. It took nearly half throttle to introduce enough atmospheric air to get a sweet enough gulp for it to fire and it started first try. So, if you have to use pure N2 on the road I'd suggest making sure your brakes are set good or chocked and try a higher throttle setting than normal. My personal experience, YMMV.
Mark Davis
N44YK
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of A. Dennis Savarese
Sent: Tuesday, January 26, 2016 6:28 AM
To: yak-list(at)matronics.com
Subject: Re: Re: Air charging valve?
Seems to me your thinking is spot on, with one additional piece of info. Some M14 and Huosai powered aircraft will start with Nitrogen in the main air system. Some won't. My Yak was one that would not start with Nitrogen in the main air system. Been there, done that, got the T shirt several times. Although I can't be certain, it may have been caused by the air start distributor timing allowing too much Nitrogen to be injected into the cylinder, thus causing an air/fuel ratio that was not conducive to combustion. Thus, having the Schrader valve on the external air fill port cover one could attach a Nitrogen bottle which can be found in many GA maintenance shops.
I made another post to this thread with a photo of a Schrader valve on the external air fill port along with a link to the coupler which attaches to the Schrader valve and a link to the actual Schrader valve used. The valve core is always removed because it is unnecessary.
Dennis
From: John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)>
To: Yak-List Digest Server <yak-list(at)matronics.com (yak-list(at)matronics.com)>
Sent: Monday, January 25, 2016 9:34 PM
Subject: Re: Re: Air charging valve?
Air pressure inlet questions.
This thread is getting quite interesting, and I thank all of you for your contributions. There are tens of thousands of hours of experience on this forum, and it is nice that this knowledge is being shared.
Most of twenty years ago, I got a ride in a CJ-6. Of course, I squeezed the bicycle brake handle that was mounted on the control stick, and was rewarded with a whoosh of air, as the brakes cycled. Interesting. The engine was easy to start, and the airplane flew well. I casually wondered why Western airplanes didn't use a similar air starting system.
Most of five years ago, at the Casa Grande airport in Arizona, I spoke with a foreign pilot who was ferrying a Sukhoi. He had stopped for fuel, and then ran the airplane out of air while trying to start it. He was in luck, as, at the time, there was a scuba diving school in town that was open. Somebody took him to the scuba store, and, after messing around with a scuba tank, he started the engine and departed.
During the two hour sit in the pilot's lounge, I learned that oxygen couldn't be used, as it created an explosive mixture, and I was told that nitrogen wouldn't work, as nitrogen would tend to discourage combustion.
Now, after buying a Yak 55M, I'd like to operate the airplane safely, and in a reliable manner. No Oxygen, for obvious reasons. I did not know that Nitrogen could be used. The Yak I bought has the original Russian quarter turn fitting behind the wing on the left side of the fuselage. This past weekend, I looked at a CJ-6 that had a similar fitting, except that someone had modified it with the installation of a Schreader valve, presumably of the high-pressure type. The owner had a scuba tank in his hangar with the brass thread-on Schreader valve attached via a hose. This set-up might provide two advantages: 1. If one gets stuck away from one's own scuba tank, they might get their airplane started via a borrowed Nitrogen bottle, which is common at most sizable airports. 2. The original Russian fitting has a dust cap that is held on with a cable lanyard. With a Schreader valve, one wouldn't have to use, and leave off, this cap. Thus far, the original Russian set-up has been working fine.
Folks, if my thinking is defective, please educate me. I appreciate your feedback!
John B
Phoenix, AZ
On Mon, Jan 25, 2016 at 1:08 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
--> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
Pure oxygen under high pressure will spontaneously combust when exposed to grease and oils without any other source of ignition.
When we replenish aircraft oxygen systems at work (I am an Aircraft Engineer) we make sure we have clean hands, clean overalls and we use a dedicated set of clean tools that are only used on oxygen systems. Seriously guys, yes you are sitting in a room full of it, but under high pressure oxygen is lethal. To relate this back to the topic on hand, I will put it bluntly; ONLY FILL YOUR YAK AIR SYSTEM WITH OXYGEN IF YOU WANT TO DIE!!
Schrader valves are commonly used on commercial aircraft for applications far exceeding the pressures we are talking about here, but they are these type: https://www.schraderinternational.com/Products/Product-Folder/NA-High-Pressure-Valves-and-Connectors?sc_lang=en-US-AP
My question is, what is wrong with the Russian type os fitting that comes fitted to the aircraft as standard? I personally think the design is very clever and reliable. I looked at getting some machined up a while ago and the price was very reasonable at $100 or so each. As it happened, I was given one, but if enough people want one, I will get some made.
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452269#452269
===========
br> fts!)
r> > w.buildersbooks.com" rel="noreferrer" target="_blank">www.buildersbooks.com
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
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cjpilot710(at)aol.com
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| Posted: Tue Jan 26, 2016 8:11 am Post subject: Air charging valve? |
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The oil dilution system is an old idea from World War 2. I understand it was originally a Russian idea that the Germans caught on to. It was used after or just before engine shutdown. If you knew how long the airplane was going to be parked in very cold weather you would activate the dilution system for so many minutes or seconds depending on how long the airplane was going to be sitting. That kept the oil warm oil viscosity low for that time .. gasoline / fuel would eventually evaporate out of the oil solution and the oil would become thicker again after a certain period of time depending on how much fuel you had put into the oil.
Bush pilots in Alaska often would drain the oil out of their engines if they were going to sit overnight. They would drain it into a container that they could put on a stove fire or campfire even to thin out the oil.
If you use the dilution system make sure that you read the pilot's manual or the operating manual for the airplane for its exact operation.
Sent via the Samsung GALAXY S® 5, an AT&T 4G LTE smartphone
-------- Original message --------
From: John B <jbsoar(at)gmail.com>
Date: 1/26/2016 03:38 (GMT-05:00)
To: Yak-List Digest Server <yak-list(at)matronics.com>
Subject: Re: Yak-List: Re: Air charging valve?
Can anyone shed some light on the oil dilution system? For cold stating, one would guess. Is it normally used in the temperate climates?john b
On Mon, Jan 25, 2016 at 11:05 PM, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Spanners? Doesn't the Schrader valve thread on with a knurled nut? The yellow-painted brass cap comes off with a 3/8 wrench, as I recall. Or am I confused again?john b
On Mon, Jan 25, 2016 at 10:30 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
| Quote: | --> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
I forgot to mention that the other disadvantage of a schrader valve is that you need spanners to operate it. The quarter turn Russian one, you don't!
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452289#452289
===========
br> fts!)
r> > w.buildersbooks.com" rel="noreferrer" target="_blank">www.buildersbooks.com
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
-Matt Dralle, List Admin.
===========
List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?Yak-List
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eferrer" target="_blank">http://forums.matronics.com
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-Matt Dralle, List Admin.
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Viperdoc
Joined: 19 Apr 2014
Posts: 484
Location: 08A
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| Posted: Tue Jan 26, 2016 10:12 am Post subject: Air charging valve? |
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Not. No spanner needed. If you want to remove the cover and Schader valve all you need is small adjustable (aka Mexican speed wrench) to rotate the 3/8 in nut on the base of the Schader valve counter clockwise. But once mounted I can't find a reason for removing the plate it is mounted on.
Doc
Sent from my iPad
On Jan 26, 2016, at 12:05 AM, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Spanners? Doesn't the Schrader valve thread on with a knurled nut? The yellow-painted brass cap comes off with a 3/8 wrench, as I recall. Or am I confused again?john b
On Mon, Jan 25, 2016 at 10:30 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
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wlannon(at)shaw.ca
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| Posted: Tue Jan 26, 2016 10:42 am Post subject: Air charging valve? |
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Oil dilution predates WW2 by a few years. In the early 1930’s a young aircraft mechanic by the name of T.W.(Tommy) Siers working in the Canadian north
noticed that some truck drivers poured gasoline into their engine oil before shutting down for the night. He thought the idea could be adapted to aircraft engines and, with the co-operation of his employer (Canadian Airways), he did just that.
By about 1938/39 they succeeded and had the process approved by the Canadian aviation authorities. As a direct result the process was adopted by the US military and became a standard procedure for extreme cold weather operations.
For his pioneering efforts he was awarded the 1940 McKee Trophy for the advancement of Canadian Aviation. If you are interested in the full story just Google it.
The reason I know something of this history is that when I started as an apprentice with Canadian Pacific Airlines in 1950 Tommy Siers was Director of Maintenance and my boss.
Oil dilution was a huge advancement for the time. Today it is just history and has absolutely no useful purpose in the aircraft we are operating. As a matter of fact it can be highly detrimental for a number of reasons. I have always completely removed it from every restoration I have done whether CJ6, Harvard or T6.
Walt
From: cjpilot710 (cjpilot710(at)aol.com)
Sent: Tuesday, January 26, 2016 8:10 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Re: Air charging valve?
The oil dilution system is an old idea from World War 2. I understand it was originally a Russian idea that the Germans caught on to. It was used after or just before engine shutdown. If you knew how long the airplane was going to be parked in very cold weather you would activate the dilution system for so many minutes or seconds depending on how long the airplane was going to be sitting. That kept the oil warm oil viscosity low for that time .. gasoline / fuel would eventually evaporate out of the oil solution and the oil would become thicker again after a certain period of time depending on how much fuel you had put into the oil.
Bush pilots in Alaska often would drain the oil out of their engines if they were going to sit overnight. They would drain it into a container that they could put on a stove fire or campfire even to thin out the oil.
If you use the dilution system make sure that you read the pilot's manual or the operating manual for the airplane for its exact operation.
Sent via the Samsung GALAXY S® 5, an AT&T 4G LTE smartphone
-------- Original message --------
From: John B <jbsoar(at)gmail.com>
Date: 1/26/2016 03:38 (GMT-05:00)
To: Yak-List Digest Server <yak-list(at)matronics.com>
Subject: Re: Re: Air charging valve?
Can anyone shed some light on the oil dilution system? For cold stating, one would guess. Is it normally used in the temperate climates? john b
On Mon, Jan 25, 2016 at 11:05 PM, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Spanners? Doesn't the Schrader valve thread on with a knurled nut? The yellow-painted brass cap comes off with a 3/8 wrench, as I recall. Or am I confused again? john b
On Mon, Jan 25, 2016 at 10:30 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
| Quote: | --> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
I forgot to mention that the other disadvantage of a schrader valve is that you need spanners to operate it. The quarter turn Russian one, you don't!
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452289#452289
===========
br> fts!)
r> > w.buildersbooks.com" rel="noreferrer" target="_blank">www.buildersbooks.com
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
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===========
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dougsappllc(at)gmail.com
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| Posted: Tue Jan 26, 2016 11:27 am Post subject: Air charging valve? |
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Those of you who have never been real cold, real hungry, and out of good ideas all at the same time need to read "4 Degrees Celsius", Walt's Tommy Siers plays a prominent roll in this story.
Doug
On Tue, Jan 26, 2016 at 10:35 AM, Walter Lannon <wlannon(at)shaw.ca (wlannon(at)shaw.ca)> wrote:
| Quote: | Oil dilution predates WW2 by a few years.  In the early 1930’s a young aircraft mechanic by the name of T.W.(Tommy) Siers working in the Canadian north
noticed that some truck drivers poured gasoline into their engine oil before shutting down for the night. He thought the idea could be adapted to aircraft engines and, with the co-operation of his employer (Canadian Airways), he did just that.
By about 1938/39 they succeeded and had the process approved by the Canadian aviation authorities. As a direct result the process was adopted by the US military and became a standard procedure for extreme cold weather operations.
For his pioneering efforts he was awarded the 1940 McKee Trophy for the advancement of Canadian Aviation. If you are interested in the full story just Google it.  Â
The reason I know something of this history is that when I started as an apprentice with Canadian Pacific Airlines in 1950 Tommy Siers was Director of Maintenance and my boss.
Oil dilution was a huge advancement for the time. Today it is just history and has absolutely no useful purpose in the aircraft we are operating.  As a matter of fact it can be highly detrimental for a number of reasons.  I have always completely removed it from every restoration I have done whether CJ6, Harvard or T6.
Â
Walt
Â
From: cjpilot710 (cjpilot710(at)aol.com)
Sent: Tuesday, January 26, 2016 8:10 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Re: Air charging valve?
Â
The oil dilution system is an old idea from World War 2. I understand it was originally a Russian idea that the Germans caught on to. It was used after or just before engine shutdown. If you knew how long the airplane was going to be parked in very cold weather you would activate the dilution system for so many minutes or seconds depending on how long the airplane was going to be sitting. That kept the oil warm oil viscosity low for that time .. gasoline / fuel would eventually evaporate out of the oil solution and the oil would become thicker again after a certain period of time depending on how much fuel you had put into the oil.
Bush pilots in Alaska often would drain the oil out of their engines if they were going to sit overnight. They would drain it into a container that they could put on a stove fire or campfire even to thin out the oil.Â
Â
If you use the dilution system make sure that you read the pilot's manual or the operating manual for the airplane for its exact operation.
Â
Â
Â
Sent via the Samsung GALAXY S® 5, an AT&T 4G LTE smartphone
-------- Original message --------
From: John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)>
Date: 1/26/2016 03:38 (GMT-05:00)
To: Yak-List Digest Server <yak-list(at)matronics.com (yak-list(at)matronics.com)>
Subject: Re: Re: Air charging valve?
Can anyone shed some light on the oil dilution system? For cold stating, one would guess. Is it normally used in the temperate climates? john b
Â
On Mon, Jan 25, 2016 at 11:05 PM, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Spanners? Doesn't the Schrader valve thread on with a knurled nut? The yellow-painted brass cap comes off with a 3/8 wrench, as I recall. Or am I confused again? john b
Â
On Mon, Jan 25, 2016 at 10:30 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
Â
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Â
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dsavarese0812(at)bellsout
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| Posted: Tue Jan 26, 2016 2:01 pm Post subject: Air charging valve? |
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Chris,
You're thinking of this type of Schrader valve which does require a "spanner" to open.
https://cdn.shopify.com/s/files/1/0746/7711/products/airtec-H-4361-Shock-Strut-Valve_large.png?v=1434086615
But we don't use or need that type of Schrader valve. We use only a basic Schrader valve with the valve core removed.
http://www.amazon.com/dp/B003X5Q8LY/ref=dra_a_rv_ss_hn_xx_P1250_1000?tag=dradisplay-20&ascsubtag=27e62c756e24d097fd887e64a4fa0191_S
With the valve core removed, the Schader valve becomes nothing more than an adapter for the hose coupling from the compressed air tank hose to attach to. Remember, we have high pressure check valves on the back side of the external air fill port preventing the air from the main and emergency air bottles from escaping. That's why we don't need a valve core in the Schrader valve. Think of the valve core as a one way check valve which prevents the air from escaping. Just like on a tire inner tube or rim. It allows air to go in, but not back out.
Dennis
From: Roger Kemp <f16viperdoc(at)me.com>
To: yak-list(at)matronics.com
Sent: Tuesday, January 26, 2016 1:08 PM
Subject: Re: Re: Air charging valve?
Not. No spanner needed. If you want to remove the cover and Schader valve all you need is small adjustable (aka Mexican speed wrench) to rotate the 3/8 in nut on the base of the Schader valve counter clockwise. But once mounted I can't find a reason for removing the plate it is mounted on.
DocSent from my iPad
On Jan 26, 2016, at 12:05 AM, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Spanners? Doesn't the Schrader valve thread on with a knurled nut? The yellow-painted brass cap comes off with a 3/8 wrench, as I recall. Or am I confused again?john b
On Mon, Jan 25, 2016 at 10:30 PM, Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> wrote:
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Looigi
Joined: 20 Apr 2015
Posts: 81
Location: Christchurch, New Zealand
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| Posted: Tue Jan 26, 2016 6:10 pm Post subject: Re: Air charging valve? |
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Now that is a cool idea! How does the air get into the aircraft system from the valve stem on the cover plate? My Yak 52 is still getting overhauled in Russia, so I don't have an aircraft handy to look at.
I think you are quite brave using a brass fitting for this application; the maximum working pressure listed for this fitting is 200psi!!
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dsavarese0812(at)bellsout
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| Posted: Wed Jan 27, 2016 4:42 am Post subject: Air charging valve? |
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The working pressure is limited only by the valve core. Certainly not the brass fitting. So there is no bravery involved. Since the valve core is removed, there is no limitations associated with the brass fitting.
Inside the cover plate is a thick rubber grommet. The cover plate presses up again the rubber grommet. The rubber grommet remains on the aircraft when the cover plate is removed and is/was used for the Russian air fill adapter. We just make use of what is already on the aircraft.
Dennis
From: Looigi <cdoburton(at)gmail.com>
To: yak-list(at)matronics.com
Sent: Tuesday, January 26, 2016 9:10 PM
Subject: Yak-List: Re: Air charging valve?
--> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
Now that is a cool idea! How does the air get into the aircraft system from the valve stem on the cover plate? My Yak 52 is still getting overhauled in Russia, so I don't have an aircraft handy to look at.
I think you are quite brave using a brass fitting for this application; the maximum working pressure listed for this fitting is 200psi!!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452331#452331
[b]http://www.matronics.com/Navisp; - MATRONICS WEB FORUMS -
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jbsoar(at)gmail.com
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| Posted: Wed Jan 27, 2016 9:01 am Post subject: Air charging valve? |
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Dennis-Do you have any pictures of this valve set-up?
On Wed, Jan 27, 2016 at 5:36 AM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:
| Quote: | The working pressure is limited only by the valve core. Certainly not the brass fitting. So there is no bravery involved. Since the valve core is removed, there is no limitations associated with the brass fitting.
Inside the cover plate is a thick rubber grommet. The cover plate presses up again the rubber grommet. The rubber grommet remains on the aircraft when the cover plate is removed and is/was used for the Russian air fill adapter. We just make use of what is already on the aircraft.
Dennis
From: Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Sent: Tuesday, January 26, 2016 9:10 PM
Subject: Re: Air charging valve?
--> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>
Now that is a cool idea! How does the air get into the aircraft system from the valve stem on the cover plate? My Yak 52 is still getting overhauled in Russia, so I don't have an aircraft handy to look at.
I think you are quite brave using a brass fitting for this application; the maximum working pressure listed for this fitting is 200psi!!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452331#452331
http://www.matronics.com/Navisp; Â Â Â Â Â Â - MATRONICS WEB FORUMS -
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Ernie
Joined: 11 Jan 2006
Posts: 513
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| Posted: Wed Jan 27, 2016 9:29 am Post subject: Air charging valve? |
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I liked the original bayonet fitting which I kept on both my previous cj and my l29. I took a stock T-handle adapter and fitted a Schrader valve on it. This is what I traveled with.Â
Ernie
On Wednesday, January 27, 2016, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Dennis-Do you have any pictures of this valve set-up?
On Wed, Jan 27, 2016 at 5:36 AM, A. Dennis Savarese <[url=javascript:_e(%7B%7D,'cvml','dsavarese0812(at)bellsouth.net');]dsavarese0812(at)bellsouth.net[/url]> wrote:
| Quote: | The working pressure is limited only by the valve core. Certainly not the brass fitting. So there is no bravery involved. Since the valve core is removed, there is no limitations associated with the brass fitting.
Inside the cover plate is a thick rubber grommet. The cover plate presses up again the rubber grommet. The rubber grommet remains on the aircraft when the cover plate is removed and is/was used for the Russian air fill adapter. We just make use of what is already on the aircraft.
Dennis
From: Looigi <[url=javascript:_e(%7B%7D,'cvml','cdoburton(at)gmail.com');]cdoburton(at)gmail.com[/url]>
To: [url=javascript:_e(%7B%7D,'cvml','yak-list(at)matronics.com');]yak-list(at)matronics.com[/url]
Sent: Tuesday, January 26, 2016 9:10 PM
Subject: Yak-List: Re: Air charging valve?
--> Yak-List message posted by: "Looigi" <[url=javascript:_e(%7B%7D,'cvml','cdoburton(at)gmail.com');]cdoburton(at)gmail.com[/url]>
Now that is a cool idea! How does the air get into the aircraft system from the valve stem on the cover plate? My Yak 52 is still getting overhauled in Russia, so I don't have an aircraft handy to look at.
I think you are quite brave using a brass fitting for this application; the maximum working pressure listed for this fitting is 200psi!!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452331#452331
http://www.matronics.com/Navisp; Â Â Â Â Â Â - MATRONICS WEB FORUMS -
=Â --> http://========================
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69gcbc
Joined: 12 Aug 2014
Posts: 10
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| Posted: Wed Jan 27, 2016 9:40 am Post subject: Air charging valve? |
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F.Y.I.-
http://www.ebay.com/itm/Russian-to-Schrader-Air-Fill-Fitting-Yak-52-CJ-6-Nanchang-/262237283618?hash=item3d0e8f6522:g:uPYAAOSwDNdV0gqP&vxp=mtr
On Wed, Jan 27, 2016 at 9:24 AM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote:
| Quote: | I liked the original bayonet fitting which I kept on both my previous cj and my l29. I took a stock T-handle adapter and fitted a Schrader valve on it. This is what I traveled with.Â
Ernie
On Wednesday, January 27, 2016, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Dennis-Do you have any pictures of this valve set-up?
On Wed, Jan 27, 2016 at 5:36 AM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net> wrote:
| Quote: | The working pressure is limited only by the valve core. Certainly not the brass fitting. So there is no bravery involved. Since the valve core is removed, there is no limitations associated with the brass fitting.
Inside the cover plate is a thick rubber grommet. The cover plate presses up again the rubber grommet. The rubber grommet remains on the aircraft when the cover plate is removed and is/was used for the Russian air fill adapter. We just make use of what is already on the aircraft.
Dennis
From: Looigi <cdoburton(at)gmail.com>
To: yak-list(at)matronics.com
Sent: Tuesday, January 26, 2016 9:10 PM
Subject: Re: Air charging valve?
--> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com>
Now that is a cool idea! How does the air get into the aircraft system from the valve stem on the cover plate? My Yak 52 is still getting overhauled in Russia, so I don't have an aircraft handy to look at.
I think you are quite brave using a brass fitting for this application; the maximum working pressure listed for this fitting is 200psi!!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452331#452331
http://www.matronics.com/Navisp; Â Â Â Â Â Â - MATRONICS WEB FORUMS -
=Â --> http://========================
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fishmouth500
Joined: 07 Apr 2015
Posts: 43
Location: Southern California
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| Posted: Wed Jan 27, 2016 10:15 am Post subject: Air charging valve? |
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i counted at least twenty seconds....you need more coffee.. !!
On Wed, Jan 27, 2016 at 9:34 AM, Todd Bohlman <tbohlman(at)gmail.com (tbohlman(at)gmail.com)> wrote:
| Quote: | F.Y.I.-
http://www.ebay.com/itm/Russian-to-Schrader-Air-Fill-Fitting-Yak-52-CJ-6-Nanchang-/262237283618?hash=item3d0e8f6522:g:uPYAAOSwDNdV0gqP&vxp=mtr
On Wed, Jan 27, 2016 at 9:24 AM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote:
| Quote: | I liked the original bayonet fitting which I kept on both my previous cj and my l29. I took a stock T-handle adapter and fitted a Schrader valve on it. This is what I traveled with.Â
Ernie
On Wednesday, January 27, 2016, John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:
| Quote: | Dennis-Do you have any pictures of this valve set-up?
On Wed, Jan 27, 2016 at 5:36 AM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net> wrote:
| Quote: | The working pressure is limited only by the valve core. Certainly not the brass fitting. So there is no bravery involved. Since the valve core is removed, there is no limitations associated with the brass fitting.
Inside the cover plate is a thick rubber grommet. The cover plate presses up again the rubber grommet. The rubber grommet remains on the aircraft when the cover plate is removed and is/was used for the Russian air fill adapter. We just make use of what is already on the aircraft.
Dennis
From: Looigi <cdoburton(at)gmail.com>
To: yak-list(at)matronics.com
Sent: Tuesday, January 26, 2016 9:10 PM
Subject: Re: Air charging valve?
--> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com>
Now that is a cool idea! How does the air get into the aircraft system from the valve stem on the cover plate? My Yak 52 is still getting overhauled in Russia, so I don't have an aircraft handy to look at.
I think you are quite brave using a brass fitting for this application; the maximum working pressure listed for this fitting is 200psi!!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=452331#452331
http://www.matronics.com/Navisp; Â Â Â Â Â Â - MATRONICS WEB FORUMS -
=Â --> http://========================
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dsavarese0812(at)bellsout
Guest
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| Posted: Wed Jan 27, 2016 11:28 am Post subject: Air charging valve? |
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I posted the only photo I have to the Yak list 2 days ago. It shows the Schrader valve affixed to the external air fill port.
Dennis
From: John B <jbsoar(at)gmail.com>
To: Yak-List Digest Server <yak-list(at)matronics.com>
Sent: Wednesday, January 27, 2016 11:52 AM
Subject: Re: Yak-List: Re: Air charging valve?
Dennis-Do you have any pictures of this valve set-up?
On Wed, Jan 27, 2016 at 5:36 AM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote: | Quote: | The working pressure is limited only by the valve core. Certainly not the brass fitting. So there is no bravery involved. Since the valve core is removed, there is no limitations associated with the brass fitting.
Inside the cover plate is a thick rubber grommet. The cover plate presses up again the rubber grommet. The rubber grommet remains on the aircraft when the cover plate is removed and is/was used for the Russian air fill adapter. We just make use of what is already on the aircraft.
Dennis
From: Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> To: yak-list(at)matronics.com (yak-list(at)matronics.com) Sent: Tuesday, January 26, 2016 9:10 PM Subject: Yak-List: Re: Air charging valve?
--> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>Now that is a cool idea! How does the air get into the aircraft system from the valve stem on the cover plate? My Yak 52 is still getting overhauled in Russia, so I don't have an aircraft handy to look at.I think you are quite brave using a brass fitting for this application; the maximum working pressure listed for this fitting is 200psi!!Read this topic online here:http://forums.matronics.com/viewtopic.php?p=452331#452331http://www.matronics.com/Navisp; - MATRONICS WEB FORUMS -= --> http://========================
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johnrobertnolan(at)gmail.
Guest
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| Posted: Mon Feb 01, 2016 6:47 pm Post subject: Air charging valve? |
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While we are on this area of discussion. Does anyone have the cover for the air charging port? I have found it difficult to find one. Mine has been missing since i bought my Yak-52.
John Nolan
On Wed, Jan 27, 2016 at 12:22 PM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:
| Quote: | I posted the only photo I have to the Yak list 2 days ago. It shows the Schrader valve affixed to the external air fill port.
Dennis
From: John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)>
To: Yak-List Digest Server <yak-list(at)matronics.com (yak-list(at)matronics.com)>
Sent: Wednesday, January 27, 2016 11:52 AM
Subject: Re: Re: Air charging valve?
Dennis-Do you have any pictures of this valve set-up?
On Wed, Jan 27, 2016 at 5:36 AM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote: | Quote: | The working pressure is limited only by the valve core. Certainly not the brass fitting. So there is no bravery involved. Since the valve core is removed, there is no limitations associated with the brass fitting.
Inside the cover plate is a thick rubber grommet. The cover plate presses up again the rubber grommet. The rubber grommet remains on the aircraft when the cover plate is removed and is/was used for the Russian air fill adapter. We just make use of what is already on the aircraft.
Dennis
From: Looigi <cdoburton(at)gmail.com (cdoburton(at)gmail.com)> To: yak-list(at)matronics.com (yak-list(at)matronics.com) Sent: Tuesday, January 26, 2016 9:10 PM Subject: Re: Air charging valve?
--> Yak-List message posted by: "Looigi" <cdoburton(at)gmail.com (cdoburton(at)gmail.com)>Now that is a cool idea! How does the air get into the aircraft system from the valve stem on the cover plate? My Yak 52 is still getting overhauled in Russia, so I don't have an aircraft handy to look at.I think you are quite brave using a brass fitting for this application; the maximum working pressure listed for this fitting is 200psi!!Read this topic online here:http://forums.matronics.com/viewtopic.php?p=452331#452331http://www.matronics.com/Navisp;       - MATRONICS WEB FORUMS -= --> http://========================
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