Today's Message Index:
----------------------
1. 04:56 AM - Re: No Brakes! (A. Dennis Savarese)
2. 06:23 AM - Re: No Brakes! (doug sapp)
3. 07:37 AM - Re: No Brakes! (Mark Davis)
4. 08:32 AM - Re: Engine For Sale 285hp (ONTHEGOSA@aol.com)
5. 08:39 AM - Re: No Brakes! (doug sapp)
6. 08:49 AM - Re: No Brakes! (A. Dennis Savarese)
7. 08:49 AM - Re: No Brakes! (A. Dennis Savarese)
8. 11:12 AM - Re: Paintball tank? (Craig Winkelmann, CFI)
9. 11:12 AM - Florida Yakers.... (Craig Winkelmann, CFI)
10. 02:47 PM - CJ Fresh Air - NACA ducts for a CJ (Craig Winkelmann, CFI)
11. 03:24 PM - Cj-6 engine (gena perevedentsev)
12. 03:42 PM - Re: CJ Fresh Air - NACA ducts for a CJ (ronald wasson)
13. 06:02 PM - Re: CJ Fresh Air - NACA ducts for a CJ (vectorwarbirds@aol.com)
14. 09:33 PM - rear gear valve (Jon Boede)
15. 10:13 PM - Re: rear gear valve (Jim)
16. 11:35 PM - Switch radio and intercom, push to talk (Jesus Sagastuy)
17. 11:39 PM - Re: No Brakes! (mikspin)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Mike is correct about the brake differential valve. Most importantly,
the pressure should be the same on both sides with the applicable rudder
pedal fully depressed. The pressure is directly proportional to the
pressure in the main air tank. The ratio is approximate 8 to 1
reduction through the brake reducing valve which feeds the brake
differential valve. As long as you hold the brake handle, the pressure
should remain constant and proportional to the pressure in the main air
tank. The brake differential valve can be rebuilt pretty easily. Doug
Sapp has the rebuild kits for them. Yes, they are identical to the CJ6
brake differential valve. So is the brake reducing valve. Doug has the
kits for them as well.
Dennis
----- Original Message -----
From: mike holoman
To: yak-list@matronics.com
Sent: Wednesday, August 20, 2008 8:57 PM
Subject: RE: Yak-List: No Brakes!
Check your brake differential valve pressure to your right wheel, it
should be at most 120 psi at full squeeze.
> From: czech6@mesanetworks.net
> To: yak-list@matronics.com
> Subject: Yak-List: No Brakes!
> Date: Wed, 20 Aug 2008 18:55:19 -0600
>
<czech6@mesanetworks.net>
>
> I have a Yak 52. My brakes work great for a few minutes during
landing, then
> the right one (only) disappears almost completely. Pads are good.
Left one
> is perfect.
> Do they fade that fast, or could it be something more expensive then
fading?
>
> Thanks.
>
>
> ===========
>
>
>
-------------------------------------------------------------------------
-----
Be the filmmaker you always wanted to be=97learn how to burn a DV01/'
target='_new'>Make your smash hit
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Bill,
It is most likley that your brake distribution valve is going TU. I have
the parts to overhaul them, I also have parts to overhaul the brake pressure
reducing valve. Give me a call if I can help.
On Wed, Aug 20, 2008 at 5:55 PM, Bill Geipel <czech6@mesanetworks.net>wrote:
>
> I have a Yak 52. My brakes work great for a few minutes during landing,
> then
> the right one (only) disappears almost completely. Pads are good. Left one
> is perfect.
> Do they fade that fast, or could it be something more expensive then
> fading?
>
> Thanks.
>
>
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Dennis,
Just trying to understand the system. If it is the proportioning
valve, why would Bill have good brakes when cold, then only lose one
side after rollout? Just enough difference in the condition of the two
brakes to make one fade but not the other? Or is it maybe just enough
difference in the proportioning valve to make two similarly warmed up
brakes act differently?
Thanks,
Mark Davis
N44YK
----- Original Message -----
From: A. Dennis Savarese
To: yak-list@matronics.com
Sent: Thursday, August 21, 2008 5:55 AM
Subject: Re: Yak-List: No Brakes!
Mike is correct about the brake differential valve. Most importantly,
the pressure should be the same on both sides with the applicable rudder
pedal fully depressed. The pressure is directly proportional to the
pressure in the main air tank. The ratio is approximate 8 to 1
reduction through the brake reducing valve which feeds the brake
differential valve. As long as you hold the brake handle, the pressure
should remain constant and proportional to the pressure in the main air
tank. The brake differential valve can be rebuilt pretty easily. Doug
Sapp has the rebuild kits for them. Yes, they are identical to the CJ6
brake differential valve. So is the brake reducing valve. Doug has the
kits for them as well.
Dennis
----- Original Message -----
From: mike holoman
To: yak-list@matronics.com
Sent: Wednesday, August 20, 2008 8:57 PM
Subject: RE: Yak-List: No Brakes!
Check your brake differential valve pressure to your right wheel, it
should be at most 120 psi at full squeeze.
> From: czech6@mesanetworks.net
> To: yak-list@matronics.com
> Subject: Yak-List: No Brakes!
> Date: Wed, 20 Aug 2008 18:55:19 -0600
>
<czech6@mesanetworks.net>
>
> I have a Yak 52. My brakes work great for a few minutes during
landing, then
> the right one (only) disappears almost completely. Pads are good.
Left one
> is perfect.
> Do they fade that fast, or could it be something more expensive
then fading?
>
> Thanks.
>
>
> ===========
>
>
>
-------------------------------------------------------------------------
---
Be the filmmaker you always wanted to be=97learn how to burn a
DV01/' target='_new'>Make your smash hit
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
.com/Navigator?Yak-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
-------------------------------------------------------------------------
-----
Checked by AVG.
8/20/2008 8:12 AM
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Engine For Sale 285hp |
Hello Franc,
Sorry but I sold that engine a while back, the new owner has already
installed it.
Regards,
Scott Andrews
**************It's only a deal if it's where you want to go. Find your travel
deal here.
(http://information.travel.aol.com/deals?ncid=aoltrv00050000000047)
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Bill,
Not suggesting that this is your problem but I have noticed that at annual
when the wheel bearing are repacked some folks are using the wrong (to
light) grease, and the felt wheel seals are not getting replaced. In hot
weather this lighter body grease is slinging out of the bearing. If the
felt seals are old or missing this will allow the grease to migrate into the
brake drum. Seals are cheap and normally always in stock.
On Wed, Aug 20, 2008 at 5:55 PM, Bill Geipel <czech6@mesanetworks.net>wrote:
>
> I have a Yak 52. My brakes work great for a few minutes during landing,
> then
> the right one (only) disappears almost completely. Pads are good. Left one
> is perfect.
> Do they fade that fast, or could it be something more expensive then
> fading?
>
> Thanks.
>
>
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
I'm not sure Mark. It could also be caused by a bad or missing rear
felt grease seal which caused the grease from the rear bearing area to
migrate outward toward the brake pads and all over the rear dust cover.
The easiest and least expensive fix would be to pull the wheel assembly
and inspect the rear seal and the area around the rear dust cover for
grease. It will be obvious because the grease will be covered with
brake dust. If the felt seal is broken or missing, then I would focus
on this being the possible cause. Replace the grease seals in the hub,
front and rear; remove the brake pads and wash thoroughly with avgas as
this will remove most all of the grease and not leave a residue on the
pads; DO NOT TURN THE DRUMS under any circumstances, regardless of how
scored they will be. Only replace drums, which Doug has in stock; using
60 grit Emory cloth, sand the inner surface of the drum to break the
glaze; using mineral spirits or similar solvent, thoroughly pressure
wash all of the excess grease from around the brake surface area and the
spindle paying particular attention to the area on and around the rear
dust cover behind the rear bearing and the dust cover around behind the
brake pucks; clean and repack the wheel bearing; reassemble and test.
If this doesn't fix the problem, overhaul the brake differential valve.
It's less than a $100 for the parts.
Dennis
----- Original Message -----
From: Mark Davis
To: yak-list@matronics.com
Sent: Thursday, August 21, 2008 9:36 AM
Subject: Re: Yak-List: No Brakes!
Dennis,
Just trying to understand the system. If it is the
proportioning valve, why would Bill have good brakes when cold, then
only lose one side after rollout? Just enough difference in the
condition of the two brakes to make one fade but not the other? Or is
it maybe just enough difference in the proportioning valve to make two
similarly warmed up brakes act differently?
Thanks,
Mark Davis
N44YK
----- Original Message -----
From: A. Dennis Savarese
To: yak-list@matronics.com
Sent: Thursday, August 21, 2008 5:55 AM
Subject: Re: Yak-List: No Brakes!
Mike is correct about the brake differential valve. Most
importantly, the pressure should be the same on both sides with the
applicable rudder pedal fully depressed. The pressure is directly
proportional to the pressure in the main air tank. The ratio is
approximate 8 to 1 reduction through the brake reducing valve which
feeds the brake differential valve. As long as you hold the brake
handle, the pressure should remain constant and proportional to the
pressure in the main air tank. The brake differential valve can be
rebuilt pretty easily. Doug Sapp has the rebuild kits for them. Yes,
they are identical to the CJ6 brake differential valve. So is the brake
reducing valve. Doug has the kits for them as well.
Dennis
----- Original Message -----
From: mike holoman
To: yak-list@matronics.com
Sent: Wednesday, August 20, 2008 8:57 PM
Subject: RE: Yak-List: No Brakes!
Check your brake differential valve pressure to your right wheel,
it should be at most 120 psi at full squeeze.
> From: czech6@mesanetworks.net
> To: yak-list@matronics.com
> Subject: Yak-List: No Brakes!
> Date: Wed, 20 Aug 2008 18:55:19 -0600
>
<czech6@mesanetworks.net>
>
> I have a Yak 52. My brakes work great for a few minutes during
landing, then
> the right one (only) disappears almost completely. Pads are
good. Left one
> is perfect.
> Do they fade that fast, or could it be something more expensive
then fading?
>
> Thanks.
>
>
> ===========
>
>
>
-------------------------------------------------------------------------
-
Be the filmmaker you always wanted to be=97learn how to burn a
DV01/' target='_new'>Make your smash hit
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronhre
f="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
.com/Navigator?Yak-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
-------------------------------------------------------------------------
---
8/20/2008 8:12 AM
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Great minds think alike Doug.
Dennis
----- Original Message -----
From: doug sapp
To: yak-list@matronics.com
Sent: Thursday, August 21, 2008 10:39 AM
Subject: Re: Yak-List: No Brakes!
Bill,
Not suggesting that this is your problem but I have noticed that at
annual when the wheel bearing are repacked some folks are using the
wrong (to light) grease, and the felt wheel seals are not getting
replaced. In hot weather this lighter body grease is slinging out of
the bearing. If the felt seals are old or missing this will allow the
grease to migrate into the brake drum. Seals are cheap and normally
always in stock.
On Wed, Aug 20, 2008 at 5:55 PM, Bill Geipel <czech6@mesanetworks.net>
wrote:
<czech6@mesanetworks.net>
I have a Yak 52. My brakes work great for a few minutes during
landing, then
the right one (only) disappears almost completely. Pads are good.
Left one
is perfect.
Do they fade that fast, or could it be something more expensive then
fading?
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Paintball tank? |
SCUBA tanks are inexpensive, reliable and easy to fill. They also require VIPs
and hydros. A nice safety check for putting a high pressure tank in your plane.
Craig
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199821#199821
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Florida Yakers.... |
Pappy and all:
How are yo doing with all the rain. I saw pics on the Weather Channel. It does
not look too pretty.
Craig
ex-Floridian
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199822#199822
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | CJ Fresh Air - NACA ducts for a CJ |
I hear BJ Kennamore put NACA ducts on his CJ to increase the fresh air flow into
the cockpit. If BJ is on the list, I'd like to see pics and get a report of
the improved airflow.
It this better than adding a blast tube (from the gills) and feeding the cockpit?
Craig
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199836#199836
Message 11
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
We are fitting new engine to Cj-6a. This is the only aircraft of the type i
n the UK and I think in Europe and having by now three years as we look aft
er her we still
are a bit suspicious. The engine we removed is Huosai
-6J1A s/n 4741913, the engine we are
putting on is HS6A s/n 22H6A973607. It is either new or zerotimed and
the engine logbook states the date of manufacture: 16.3.1997.
We
realized that there is no groove in the air distributor casing to
accomodate the snap ring which is supposed to limit the tacho drive
shaft float.
All the manuals we have, clearly depict this groove and snap ring but on ou
r new engine this groove seems to be missing.
I can quess that there might be different arrangements to locate the drive
shaft (and thrust washer).
Engine illustrated parts Cataloque (
IPC Cj-6 Volume 4 HS-6A) describes thi
s unit on page 134 with snap ring as pos. 11.
There
is, of course, a possibility to use the distributor assembly from the
old engine, but the old engine ran out of TBO and by all signs is worn
and needs major overhaul.
Would be most gratefull if you could help us in this matter.
Thank you,
Gena Perevedentsev
West London Aeroclub
Russian Engineering=0A=0ASend instant messages to your online friends http:
//uk.messenger.yahoo.com
Message 12
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: CJ Fresh Air - NACA ducts for a CJ |
I put a reverse scoop on fuel drain panel to create low pressure under
the belly tank. I assume most of the fumes are coming from the tail
cone as that is where reports of acro smoke starts to come from. There
is no way seal the tail cone short of a high dollar bulkhead. The
scoop creates low pressure to give it a place to go out side. It is
not fix but the gauge shows it seems to help by half on landing and a
third at cruise. My glass guy made one in a day and still has the
form. I turned it around for high pressure and it made it worst on the
meter not better. No mod to the plane. I could not tell a difference
but a friend with lung problems said otherwise.
Message 13
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: CJ Fresh Air - NACA ducts for a CJ |
Unless the duct is drawing totally clean air , as from the front of the aircraft
or way out on the wing you are never going to get rid of the C02. If you are
sucking dirty air through the cockpit you are still breathing it.? That stuff
is coming in from every nook and crack on the CJ. ? I put a flange on the air
compressor cooling inlet and brought in fresh air from there, totally clean
and plenty for both cockpits
Tally Ho!
Bunndini?
-----Original Message-----
From: Craig Winkelmann, CFI <capav8r@gmail.com>
Sent: Thu, 21 Aug 2008 2:46 pm
Subject: Yak-List: CJ Fresh Air - NACA ducts for a CJ
I hear BJ Kennamore put NACA ducts on his CJ to increase the fresh air flow into
the cockpit. If BJ is on the list, I'd like to see pics and get a report of the
improved airflow.
It this better than adding a blast tube (from the gills) and feeding the
cockpit?
Craig
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199836#199836
Message 14
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Anybody have a five-port rear gear selector valve in stock? Mine is whistl
ing to the point where I'm not flyin'. :-(
Doug and Jill are both out... although I'm sending some old valves to Jill
for resurfacing.
Thanks=2C
Jon
Message 15
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: rear gear valve |
Yes I have one.
Jim Selby
----- Original Message -----
From: Jon Boede
To: yak-list@matronics.com
Sent: Thursday, August 21, 2008 9:26 PM
Subject: Yak-List: rear gear valve
Anybody have a five-port rear gear selector valve in stock? Mine is
whistling to the point where I'm not flyin'. :-(
Doug and Jill are both out... although I'm sending some old valves to
Jill for resurfacing.
Thanks,
Jon
Message 16
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Switch radio and intercom, push to talk |
Hello,=0AI have problems with the switch bottom of the radio PK23-28.=0AIt
is a push switch with 4 terminal, for two differents circuits, doyou know a
n alternative switch that can be put in the same hole.=0ARegards=0AJes=C3
=BAs=0AEC-IAQ=0A=0A__________________________________________________=0ACor
reo Yahoo!=0AEspacio para todos tus mensajes, antivirus y antispam =C2=A1gr
atis! =0AReg=C3=ADstrate ya - http://correo.yahoo.es
Message 17
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
I have replaced a set of drums on two Yak 52's where fade was a problem. It turns
out that the wall thickness (suprisingly worn despite several annuals) of
the drum was reduced to the point that the normal rate of heat absorption/dissipation
couldn't take place during anything more than light braking and low power,
level surface taxiing.
Fresh drums (and pads) resulted in no fade during the typical scenarios such as
downwind/crosswind taxi, short turnoff (I agree about letting the airplane roll
out if you can).
In both cases, the pilots commented that it felt like a completely different airplane
after the drum and pad change, even after a period of use where you would
think a glaze would set up on the drums.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199884#199884
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|