Today's Message Index:
----------------------
0. 12:16 AM - PLEASE READ - Matronics Email List Fund Raiser During November! (Matt Dralle)
1. 07:01 AM - Re: strange behavior of braking system (doug sapp)
2. 09:25 AM - tow bar -Yak (delfin)
3. 09:57 AM - Re: tow bar -Yak (Eric Wobschall)
4. 12:07 PM - Re: One of those moments (vectorwarbirds@aol.com)
5. 04:29 PM - Re: Yak spare parts (A. Dennis Savarese)
6. 04:57 PM - Re: strange behavior of braking system (A. Dennis Savarese)
7. 05:10 PM - Re: Nanchang Air Gremlins (A. Dennis Savarese)
8. 06:08 PM - Re: Yak spare parts (Roger Kemp M.D.)
Message 0
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| Subject: | PLEASE READ - Matronics Email List Fund Raiser During November! |
Dear Listers,
Each November I hold a PBS-like fund raiser to support the continued operation and upgrade of the List services at Matronics. It's solely through the Contributions of List members that these Matronics Lists are possible. There is NO advertising to support the Lists. You might have noticed the conspicuous lack of flashing banners and annoying pop-ups on the Matronics Email List email messages and web site pages such as the Matronics List Forums ( http://forums.matronics.com ), the List Wiki ( http://wiki.matronics.com), or other related pages such as the List Search Engine ( http://www.matronics.com/search ), the List Browser ( http://www.matronics.com/listbrowse ), etc. This is because I believe in a List experience that is completely about the sport we all enjoy - namely Airplanes and not about annoying advertisements.
During the month of November I will be sending out List messages every couple of
days reminding everyone that the Fund Raiser is underway. I ask for your patience
and understanding during the Fund Raiser and throughout these regular messages.
The Fund Raiser is only financial support mechanism I have to pay all
of the bills associated with running these lists. Your personal Contribution
counts!
Once again, this year I've got a terrific line up of free gifts to go along with
the various Contribution levels. Most all of these gifts have been provided
by some of the vary members and vendors that you'll find on Matronics Lists and
have been either donated or provided at substantially discounted rates.
This year, these generous people include Bob Nuckolls of the AeroElectric Connection (http://www.aeroelectric.com/), Andy Gold of the Builder's Bookstore (http://www.buildersbooks.com/), and Jon Croke of HomebuiltHELP (http://www.homebuilthelp.com/).
These are extremely generous guys and I encourage you to visit their respective
web sites. Each one offers a unique and very useful aviation-related product
line. I would like publicly to thank Bob, Andy, and Jon for their generous support
of the Lists again this year!!
You can make your List Contribution using any one of three secure methods this
year including using a credit card, PayPal, or by personal check. All three methods
afford you the opportunity to select one of this year's free gifts with
a qualifying Contribution amount!!
To make your Contribution, please visit the secure site below:
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I would like to thank everyone in advance for their generous financial AND moral
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Matt Dralle
Matronics Email List Administrator
Message 1
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| Subject: | Re: strange behavior of braking system |
Didier,
It could be one of maybe 4 things:
1. You are not getting the proper amount of air volume or pressure out of
the QS-1valve, in "CJ speak" this is the valve which reduces the amount of
air pressure and sends it on to the QS2 which is responsible for breaking,
both differential and straight ahead.
2. The QS2 has bad seals or is full of corrosion. Again, QS-1 and QS-2
are CJ6 P/N's, but I am pretty sire that the inner workings all utilize the
same parts.
3. Your brake pads or drums are very badly worn. (again same as CJ6)
4. You have a leak in BOTH of your brake bladders, which is
highly unlikely. (also same as CJ6)
Unless you have recently replaced/overhauled this portion of your air system
my guess would be that your QS-1 and QS-2 valves are in need of replacement
or overhaul. Knowing that the 52 does not have a water filter in the air
system I suspect that you will find that the internal parts are pretty
nasty.
I carry both the QS-1 and QS-2 overhaul kits as well as the water filter mod
in inventory, please contact me off list to order.
Always Yakin,
Doug
On Sat, Oct 31, 2009 at 1:30 PM, tigeryak18t <didier.blouzard@gmail.com>wrote:
>
> Hello to all,
>
> first of all I must tell you that I had a very good day together with my
> friend Christophe Bourillon owner of a superb YAK18T (see the picture
> attached). As you can see the weather in Normandy France, was.....not very
> good today but we, yakees, use to fly nearly anytime...that's a joke of
> course. If you read this Christophe thanks for this very nice day.
>
> My question is regarding the 52 braking system. Sometime, with not any
> particular reason, when I try to brake after landing and during taxying, I
> pull the brake and nothing happen. I can hear the hiss of air but no braking
> (or very inneficient) then after pumping a few time braking comes back. I
> was wondering if this could have any link with the Brake Reduction Valve or
> anything else??
>
> Has anyone experimented such behavior?
>
> Thanks for your help
>
> Didier 18T HA-JAC
> 52 RA1006K
>
> --------
> Didier Tiger YAK18T
> Member of Commemorative Air Force
> French Wing
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=270265#270265
>
>
> Attachments:
>
> http://forums.matronics.com//files/img_0753_123.jpg
>
>
--
Maybe life is not the party that we were expecting,
but in the mean time, we're here and we can still dance....."
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
Message 2
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I am looking to buy, or make a tow bar for use with a tug for my YAK-52. I
see a drawing of a tug tow bar in the manuals page 439 chapter 12.- part
number 529800-70-- "Furca De Tractare"
-
Does anyone have one for sale, have any detailed drawing or photos?- I ha
ve the hand tow bar, but would like this for use with a tug. Any thoughts?
=0A=0A=0A
Message 3
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| Subject: | Re: tow bar -Yak |
I have the factory (tubular aluminum) towbar. I can take some pictures
if you like. It's awfully long, however. I also had a small,
collapsable hand towbar with my last yak-52. It was non-original, but
very clever. It was essentially a yoke with two tube segments that
were positioned on either side of the nosewheel axle. The I.D. of
these tubes was the same as the I.D. of the nosewheel axle (where your
hand towbar is inserted). There was then an internal tube that slid
through one tube, the axle, then the other tube and was secured with
pins. Very light, very secure. This version was also collapsable to
fit on the back deck. You could probably make one with both handle and
pintle type attachments. Maybe I can get a pic of this thing from the
guy I sold my previous Yak to. I've wanted to make a similar one since
then.
-Eric 716.208.5460
On Nov 1, 2009, at 12:22 PM, delfin wrote:
>
>
> I am looking to buy, or make a tow bar for use with a tug for my
> YAK-52. I see a drawing of a tug tow bar in the manuals page 439
> chapter 12. part number 529800-70 "Furca De Tractare"
>
> Does anyone have one for sale, have any detailed drawing or photos?
> I have the hand tow bar, but would like this for use with a tug. Any
> thoughts?
>
>
Message 4
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| Subject: | Re: One of those moments |
Thats funny Barry, I guess my rear canopy is an illusion! One I have had
since 2004!
TGB
-----Original Message-----
From: Barry Hancock <bhancock@worldwidewarbirds.com>
Sent: Sat, Oct 31, 2009 7:08 pm
Subject: Yak-List: One of those moments
Just arrived at Provo with this bird on the way to deliver it to the Canad
ian Warplane Heritage Museum. Was walking away from the plane after a 3:4
5 flight when I noticed the fleeting sunset...
For you CJ officionados this first pic really highlights our exclusive one
piece rear canopy...
DSC_0067
Plane runs terrific and is squawk free. After recreating the Chinese mili
tary demo team scheme and all the detail/mod work, I hate to see it go.
But at least it will have a visible home and keep flying!
Will be pressing on to Hamilton, Ontario starting Monday. I'm trying to
update the blog as we go.... http://worldwidewarbirds.blogspot.com/
Barry Hancock
Worldwide Warbirds, Inc.
www.worldwidewarbirds.com
(909) 606-4444 office
(949) 300-5510 cell
"The complete center for warbird excellence"
Express Mailing address:
7000 Merrill Ave, B-110, Unit J
Chino, CA 91710
Regular Mailing address:
7000 Merrill Ave., Box 91
Chino, CA 91710
The information contained in this e-mail message is intended only for the
personal and confidential use of the designated recipients. If the reader
of this message is not an intended recipient, you are hereby notified tha
t any review, use, dissemination, forwarding or copying of this message is
strictly prohibited. Please notify us immediately by reply e-mail or tele
phone, and delete the original message and all attachments from your syste
m. Thank you
=
Message 5
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| Subject: | Re: Yak spare parts |
Didier,
Everything Doc says is of course accurate. However, I would add, based
on you description of the problem, consider overhauling the brake
reducing valve, since this is where application of the brakes starts
after the mechanical pull of the brake handle. Regarding the carburetor
diaphragm, WLAC does not have the diaphragms. Mark Jefferies does.
Doug Sapp has the prop seals as well as the brake reducing valve
overhaul kit.
Dennis
----- Original Message -----
From: Roger Kemp M.D.
To: yak-list@matronics.com
Sent: Saturday, October 31, 2009 8:39 PM
Subject: RE: Yak-List: Yak spare parts
<viperdoc@mindspring.com>
Didier,
A couple of Answers. West London Aero Club has the diaphragms, air
refill
adapter, and prop seal kits. The URL is
http://www.wlacrussianeng.co.uk
As for your brake issues, is this occurring after hard braking or a
long
taxi with frequent application of the brakes. If so you are
experiencing
brake fade due to the drums/shoes heating up. You can also have a felt
seal
on the wheel bearing leaking grease into the drum causing brake
failure.
Glazed brake pads will cause weak braking also. Brakes pulling to one
side
and being weak can mean grease on the shoes, glazed shoes, and leaking
brake
line off the top of my head.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of tigeryak18t
Sent: Saturday, October 31, 2009 4:42 PM
To: yak-list@matronics.com
Subject: Yak-List: Yak spare parts
<didier.blouzard@gmail.com>
Hello again
these questions will probably find an answer with Deniss, but any help
is
very welcome.
1)I am looking for the "carburator diaphragm". Where can I find one or
two
and is it a part difficult to replace?
2)Do you know if it is possible to add a Tee for inflating both the
main
system and the emergency system? (I saw that in a 52)
3)Deniss I forgot to whom shall I ask for the prop seal kit??? could
you
please have the kindness to tell me who??
4)I have fluctuations in my gauges indications. It seems that it could
come
from the floatters. Do you know if it is possible ti find these foam
floatters or to repair it or to find the gauges (picture are attached)
Thanks so much to all for any hints and tips.
Kind regards
Didier HA-JAC
RA 1006K
--------
Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=270268#270268
Attachments:
http://forums.matronics.com//files/img_0938_831.jpg
Message 6
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| Subject: | Re: strange behavior of braking system |
Glad you jumped in on this one Doug. I'm certain Didier should overhaul
both the brake reducing valve and the brake differential valve. He also
needs prop hub seals as well.
Dennis
----- Original Message -----
From: doug sapp
To: yak-list@matronics.com
Sent: Sunday, November 01, 2009 8:57 AM
Subject: Re: Yak-List: strange behavior of braking system
Didier,
It could be one of maybe 4 things:
1.. You are not getting the proper amount of air volume or pressure
out of the QS-1valve, in "CJ speak" this is the valve which reduces the
amount of air pressure and sends it on to the QS2 which is responsible
for breaking, both differential and straight ahead.
2.. The QS2 has bad seals or is full of corrosion. Again, QS-1 and
QS-2 are CJ6 P/N's, but I am pretty sire that the inner workings all
utilize the same parts.
3.. Your brake pads or drums are very badly worn. (again same as
CJ6)
4.. You have a leak in BOTH of your brake bladders, which is highly
unlikely. (also same as CJ6)
Unless you have recently replaced/overhauled this portion of your air
system my guess would be that your QS-1 and QS-2 valves are in need of
replacement or overhaul. Knowing that the 52 does not have a water
filter in the air system I suspect that you will find that the internal
parts are pretty nasty.
I carry both the QS-1 and QS-2 overhaul kits as well as the water
filter mod in inventory, please contact me off list to order.
Always Yakin,
Doug
On Sat, Oct 31, 2009 at 1:30 PM, tigeryak18t
<didier.blouzard@gmail.com> wrote:
<didier.blouzard@gmail.com>
Hello to all,
first of all I must tell you that I had a very good day together
with my friend Christophe Bourillon owner of a superb YAK18T (see the
picture attached). As you can see the weather in Normandy France,
was.....not very good today but we, yakees, use to fly nearly
anytime...that's a joke of course. If you read this Christophe thanks
for this very nice day.
My question is regarding the 52 braking system. Sometime, with not
any particular reason, when I try to brake after landing and during
taxying, I pull the brake and nothing happen. I can hear the hiss of air
but no braking (or very inneficient) then after pumping a few time
braking comes back. I was wondering if this could have any link with the
Brake Reduction Valve or anything else??
Has anyone experimented such behavior?
Thanks for your help
Didier 18T HA-JAC
52 RA1006K
--------
Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=270265#270265
Attachments:
http://forums.matronics.com//files/img_0753_123.jpg
==========
="_blank">www.aeroelectric.com
ooks.com" target="_blank">www.buildersbooks.com
et="_blank">www.homebuilthelp.com
="_blank">http://www.matronics.com/contribution
le, List Admin.
==========
rget="_blank">http://www.matronics.com/Navigator?Yak-List
==========
http://forums.matronics.com
==========
--
Maybe life is not the party that we were expecting,
but in the mean time, we're here and we can still dance....."
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
Message 7
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| Subject: | Re: Nanchang Air Gremlins |
Byron,
This is a very common problem with both the CJ and Yak 52. Rear gear
selectors very rarely get used or even cycled during the annual
condition inspection. I make it a point to cycle the gear from both the
front and the rear gear selectors. I've seen rust and corrosion so bad
in a rear gear selector that the tension spring was totally
disintegrated and the two metal surfaces that mate inside the unit had
pit marks so deep they could never be resurfaced.
Everyone should make it a point to cycle the gear from the rear cockpit
at least once a year. The alternative is fabricate a by-pass around the
rear gear selector which as everyone knows, passes the air pressure from
and through the rear gear selector to the front gear selector.
Dennis
----- Original Message -----
From: Byron Fox
To: Yak LIst ; Bay Bombers
Sent: Saturday, October 31, 2009 9:09 AM
Subject: Yak-List: Nanchang Air Gremlins
Happy Halloween!
Recently, partner Brian and I heard a hissing sound coming from our
front seat gear handle/valve. Oh well, order a new from Doug Sapp. It
arrived and we installed it on Thursday. We recharged the system, and
damn, the same hissing was escaping the valve! What the devil was going
on? Well, Brian quickly discovered that the air was coming from the two
small ports on the bottom of the valve. You know, those ones through
which air erupts when you raise or lower the gear.
Hmmm. What's the likelihood of having two bad gear valves? Not very
likely. So, we called Doug. He pondered for a moment and then suggested
that we check each of our gear actuators to determine if downside air
was bleeding by one of the actuator rams and migrating along the upside
air line back to the valve. Good idea. Did that by successively capping
off each actuator. And guess what? All three were sound, and that bloody
air poltergeist was still hissing merrily away. Notice how the amateur
mechanic will tend to animate troublesome inanimate objects.
OK, after I had regained my equanimity, I sat down to study our
enlarged, plastic laminated, CJ pneumatic system diagram. (A thoughtful
gift from Dave King) Soon, it became clear that the front seat gear
valve gets its air from the controlling back seat valve, where the
instructor would sit. Makes sense. It was time to experiment. Up on
jacks, I put the front seat gear handle in the neutral position and the
back seat handle down. Same hissing but now from the back gear valve.
Gear up, the hissing all but disappears.
One more bit of information - the back seat gear handle was
extraordinarily stiff and hard to move most likely because it gets
cycled once a year during the annual inspection.
My conclusion is that the gremlin lives in the back seat gear valve.
For all I know, it's probably been in the airplane since 1968 and has
corroded accounting for its stiffness. So, a new one is on its way, and
we'll see if I'm right.
In the mean time, do any of you vastly more experience folks have any
other ideas?
Many thanks,
Blitz
Byron M. Fox
80 Milland Drive
Mill Valley, CA 94941
415-307-2405
Message 8
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Beg to differ my friend, WLAC is where I got the diaphragm for the 50 that
we (you) put in. They also list prop seals on their website. Not to distract
from Doug and Sorry Doug I did not remember that you had the prop seals but
I did know you had the brake reducing kits. But, I was not aware you had
the entire replacement units. Sorry, my bad.
WLAC has the entire units for sell.
http://www.wlacrussianeng.co.uk/main.asp?ID=1
<http://www.wlacrussianeng.co.uk/main.asp?ID=1&Manu=&Start 0>
&Manu=&Start 0 at the bottom of the page.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese
Sent: Sunday, November 01, 2009 6:26 PM
Subject: Re: Yak-List: Yak spare parts
Didier,
Everything Doc says is of course accurate. However, I would add, based on
you description of the problem, consider overhauling the brake reducing
valve, since this is where application of the brakes starts after the
mechanical pull of the brake handle. Regarding the carburetor diaphragm,
WLAC does not have the diaphragms. Mark Jefferies does.
Doug Sapp has the prop seals as well as the brake reducing valve overhaul
kit.
Dennis
----- Original Message -----
From: Roger Kemp M.D. <mailto:viperdoc@mindspring.com>
Sent: Saturday, October 31, 2009 8:39 PM
Subject: RE: Yak-List: Yak spare parts
Didier,
A couple of Answers. West London Aero Club has the diaphragms, air refill
adapter, and prop seal kits. The URL is http://www.wlacrussianeng.co.uk
As for your brake issues, is this occurring after hard braking or a long
taxi with frequent application of the brakes. If so you are experiencing
brake fade due to the drums/shoes heating up. You can also have a felt seal
on the wheel bearing leaking grease into the drum causing brake failure.
Glazed brake pads will cause weak braking also. Brakes pulling to one side
and being weak can mean grease on the shoes, glazed shoes, and leaking brake
line off the top of my head.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of tigeryak18t
Sent: Saturday, October 31, 2009 4:42 PM
Subject: Yak-List: Yak spare parts
Hello again
these questions will probably find an answer with Deniss, but any help is
very welcome.
1)I am looking for the "carburator diaphragm". Where can I find one or two
and is it a part difficult to replace?
2)Do you know if it is possible to add a Tee for inflating both the main
system and the emergency system? (I saw that in a 52)
3)Deniss I forgot to whom shall I ask for the prop seal kit??? could you
please have the kindness to tell me who??
4)I have fluctuations in my gauges indications. It seems that it could come
from the floatters. Do you know if it is possible ti find these foam
floatters or to repair it or to find the gauges (picture are attached)
Thanks so much to all for any hints and tips.
Kind regards
Didier HA-JAC
RA 1006K
--------
Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=270268#270268
Attachments:
http://forums.matronics.com//files/img_0938_831.jpg
<http://forums.matronics.com/files/img_0938_831.jpg>
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