[rebel-builders] Moose: Rudder pedal service bulletin
Posted: Sun Feb 19, 2012 12:20 pm
Dick,
I've talked to numerous builders about this rudder issue. No one has ever
seen nor heard of a service bulletin. There might be updated pages in
Chapter 12, but no bulletin that anyone else has ever seen. If you indeed
have such a bulletin, please scan or otherwise upload it to an area on the
server and let us know so we can view it.
Thank you,
Ted
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Richard Wampach
Sent: Wednesday, September 05, 2007 11:56 PM
To: rebel-builders@dcsol.com
Subject: RE: [rebel-builders] Moose Accident's
OK Ron I have been looking for a while now, the darn thing is around
here some place.
I did locate the revised chapter 12 controls dated 21/08/2006, which by
the way does have the missing pages from earlier versions, and control
travel information on the last page (36).
Page 1 shows the floor mount brackets (15) master cylinder standoff
BRK0220.
Pages 32, 33 cover the brake pedal upgrade fig 12.1.47, 48, and 49.
I have made a few changes in this area;
I used 4 Cessna rudder pedals which drilled out to 5/8", and
added bronze bushings at the pivot point for brake action, (ACE
hardware).
I made the BRK0220's as short as possible, with just enough room
to NOT have the bottom of the master cylinders touch the floor.
I have 4 master cylinders not 2. I used the original's on the
pilots side, and Matco MC-5 cyls with reservoirs on the co-pilots side
(Aircraft Spruce pn 06-1100 $81.75 US) connected from the bottom of the
reservoir on the co-pilots side to the top of the Murphy supplied MC-4
res. on the pilots side. Then on to a Matco on-off parking brake valve
(Spruce # 06-17200) which is cable operated. This allowed me to get rid
of a lot of the cross-over linkage between the pilot's side and
co-pilot's.
After hearing about the mishap in WA, I did one more mod of my own.
Like the Cardinal C-177 I tied the two rudder torque tubes together with
a pair of modified gears. They are located at the center between the
inner pivot bearing mounts (rudder blocks CC-0102). This gives me
positive opposite pedal movement i.e. one set of pedal being moved
forward makes the other set go aft. This is independent of the rudder
cable action with springs that will normally give some cable tension,
and feed back thru the rudder its-self.
The system works very smooth on the ground. I will test it next year
when I finish the building phase and get into the flying part!
It is my intention to fly her to OSH in 08. Fuselage is done, working on
wings, then doors and engine.
Dick Wampach SR-108
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf of
Ron Shannon
Sent: Wednesday, September 05, 2007 8:32 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Moose Accident's
Dick,
Do you recall where you saw the SB about floor mounting the Moose brake
cylinders? I don't see it on the MAM web site. Probably just missing it.
I am not aware of a service bulletin about brake cylinder floor mounting
for the Rebel, and there doesn't appear to be one on the MAM site
either. See
http://murphyair.com/murphyair/Aircraft ... chSpt.html
(http://tinyurl.com/3x2s76)
To the contrary, at that link the newly updated (8/21/07) exploded view
of the Rebel control column still shows the brake cylinder attached to
the column's control tube tang, not the floor.
As I recall, debates about the pros and cons of floor mounting
(including for the Rebel) have occurred frequently on this list. My
in-progress-not-flying 254R cylinders are still column mounted, but
perhaps I'll think that through again.
Ron
254R
PS - It was nice to meet you at Oshkosh!
Richard Wampach wrote:
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
I've talked to numerous builders about this rudder issue. No one has ever
seen nor heard of a service bulletin. There might be updated pages in
Chapter 12, but no bulletin that anyone else has ever seen. If you indeed
have such a bulletin, please scan or otherwise upload it to an area on the
server and let us know so we can view it.
Thank you,
Ted
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Richard Wampach
Sent: Wednesday, September 05, 2007 11:56 PM
To: rebel-builders@dcsol.com
Subject: RE: [rebel-builders] Moose Accident's
OK Ron I have been looking for a while now, the darn thing is around
here some place.
I did locate the revised chapter 12 controls dated 21/08/2006, which by
the way does have the missing pages from earlier versions, and control
travel information on the last page (36).
Page 1 shows the floor mount brackets (15) master cylinder standoff
BRK0220.
Pages 32, 33 cover the brake pedal upgrade fig 12.1.47, 48, and 49.
I have made a few changes in this area;
I used 4 Cessna rudder pedals which drilled out to 5/8", and
added bronze bushings at the pivot point for brake action, (ACE
hardware).
I made the BRK0220's as short as possible, with just enough room
to NOT have the bottom of the master cylinders touch the floor.
I have 4 master cylinders not 2. I used the original's on the
pilots side, and Matco MC-5 cyls with reservoirs on the co-pilots side
(Aircraft Spruce pn 06-1100 $81.75 US) connected from the bottom of the
reservoir on the co-pilots side to the top of the Murphy supplied MC-4
res. on the pilots side. Then on to a Matco on-off parking brake valve
(Spruce # 06-17200) which is cable operated. This allowed me to get rid
of a lot of the cross-over linkage between the pilot's side and
co-pilot's.
After hearing about the mishap in WA, I did one more mod of my own.
Like the Cardinal C-177 I tied the two rudder torque tubes together with
a pair of modified gears. They are located at the center between the
inner pivot bearing mounts (rudder blocks CC-0102). This gives me
positive opposite pedal movement i.e. one set of pedal being moved
forward makes the other set go aft. This is independent of the rudder
cable action with springs that will normally give some cable tension,
and feed back thru the rudder its-self.
The system works very smooth on the ground. I will test it next year
when I finish the building phase and get into the flying part!
It is my intention to fly her to OSH in 08. Fuselage is done, working on
wings, then doors and engine.
Dick Wampach SR-108
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf of
Ron Shannon
Sent: Wednesday, September 05, 2007 8:32 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Moose Accident's
Dick,
Do you recall where you saw the SB about floor mounting the Moose brake
cylinders? I don't see it on the MAM web site. Probably just missing it.
I am not aware of a service bulletin about brake cylinder floor mounting
for the Rebel, and there doesn't appear to be one on the MAM site
either. See
http://murphyair.com/murphyair/Aircraft ... chSpt.html
(http://tinyurl.com/3x2s76)
To the contrary, at that link the newly updated (8/21/07) exploded view
of the Rebel control column still shows the brake cylinder attached to
the column's control tube tang, not the floor.
As I recall, debates about the pros and cons of floor mounting
(including for the Rebel) have occurred frequently on this list. My
in-progress-not-flying 254R cylinders are still column mounted, but
perhaps I'll think that through again.
Ron
254R
PS - It was nice to meet you at Oshkosh!
Richard Wampach wrote:
lockedThe rudder pedal lock up is found in NTSB report SEA07CA159, June 14
2007, Roche Harbor, WA.
----Upon landing the a/c started a slight drift to the right. Pilot
applied left rudder to compensate and felt a "thunk" as the pedal
appliedforward, over center, underneath the brake pedal, which prevented the
use of the left brake. The a/c briefly lurched to the left. He
brakehard right rudder, but no apparent effect. He next applied right
left,and intentionally ground looped the aircraft to prevent going down an
embankment. The left main landing gear collapsed.
The pilot said the rudder/brake pedal assembly has only one master
cylinder for the braking system and it is located on the right hand
side. He said there is a mechanical linkage from the right to the
dowhich is prone to jamming in certain rudder deflections----
As I recall, the brake master cylinders were mounted per the original
factory method.
There is a service bulletin out to mount the bottom of the master
cylinders to the floor.
After this mishap I re-worked my pedals, and suggest that all of you
the same!
Dick Wampach SR-108
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------