Today's Message Index:
----------------------
1. 06:46 AM - Re: Re: Fiberglass/ foam undercarriage age. (barrynorman@comcast.net)
2. 07:07 AM - Re: Re: Fiberglass/ foam undercarriage age. (Ray Wilhelm)
3. 07:12 AM - Re: Re: Fiberglass/ foam undercarriage age. (Barry J Edwards)
4. 07:18 AM - Re: Re: Fiberglass/ foam undercarriage age. (Ray Wilhelm)
5. 07:23 AM - Re: Re: Fiberglass/ foam undercarriage age. (Ray Wilhelm)
6. 07:30 AM - Upper Rudder Hinge Reinforcement. (Sonja Englert)
7. 07:37 AM - Re: Re: Fiberglass/ foam undercarriage age. (Barry J Edwards)
8. 07:48 AM - Re: Upper Rudder Hinge Reinforcement. (Barry J Edwards)
9. 12:19 PM - Re: Upper Rudder Hinge Reinforcement. (Brian Anderson)
10. 12:59 PM - Re: Re: Fiberglass/ foam undercarriage age. (Cd)
11. 01:28 PM - Re: Re: Fiberglass/ foam undercarriage age. (barrynorman@comcast.net)
12. 08:49 PM - Re: Re: Fiberglass/ foam undercarriage age. (Ray Wilhelm)
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 |
|
| Subject: | Re: Fiberglass/ foam undercarriage age. |
I have a Pulsar III with the fiberglass gear and they are wrapped with carb
on fiber all the way down to about 2 inches form the end. The last two inch
es I wrapped with several revolutions of 2 inch glass tape to try to preven
t splitting.=C2-To this point I have never had a problem and I have my ow
n custom build wheel pants and gear leg fairings installed with no vents.
=C2-
Are the legs collapsing outward when it happens?
=C2-
Barry
----- Original Message -----
>
Sent: Friday, August 24, 2012 2:34:34 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I had the wheel pants on.
Carlos Pulsar III
On Aug 23, 2012, at 1:14 PM, Larry Wheat < lwheat2083@gmail.com > wrote:
Carlos, did you have your wheel pants on or off. Cheers, Larry N852LW
=C2-
On Thu, Aug 23, 2012 at 11:33 AM, Pulsar747N < pulsar747n@yahoo.com > wrote
:
<blockquote>
I also had the same problem with the glass gear including the carbon wrap m
od. =C2-I was doing high speed test runs and the=C2- excessive heat gen
erated by the brakes collapsed the left leg about 2 inches up from the uppe
r brake holes.
I have not done anything yet but I am soon faced with replacing the gear wi
th the Grove.
Carlos, Pulsar III / Aeromax=C2- =C2-
From: Ray Wilhelm < rwilhelm@dc.rr.com >
Sent: Thursday, August 23, 2012 7:42 AM
Subject: RE: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I don't have the details. It was 2 or 3 laps around the lower legs up to
about 18 inches from where the axel is fitted, I think. I don't have the
glass gear anymore. I was the first to install a Grove gear many years ago.
The glass gear collapsed from excessive heat soak back from doing fast
landing tests.
Ray=C2- Pulsar III/3300
-----Original Message-----
From: owner-pulsar-list-server@matronics.com
[mailto: owner-pulsar-list-server@matronics.com ] On Behalf Of mjb777
Sent: Thursday, August 23, 2012 1:00 AM
Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
rwilhelm(at) dc.rr.com wrote:
> There was also a mod to the Glass gear by Skystar for the Pulsar III.
> It added carbon fiber to the gear legs to stiffen the gear legs. They
> have a tendency to shimmy when landing faster than normal.
>
> Ray=C2- =C2- =C2- Pulsar III/3300
>
>
>
>
> --
Ray do you have any details of this carbon fibre modification? Was it to th
e
whole gear or specific areas?
Does your Pulsar 3 have a wood or composite spar?
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381581#3ronics.com/Navigator?
Pulsar-List " target="_blank"> http://www.matronics.co ======
==================
arget="_blank"> http://www.matronics.com/Navigator?Pulsar-List ttp://foru
ms.matronics.com _blank"> http://www.matronics.com/contribution
--
Larry Wheat
href="http://www.matronics.com/Navigator?Pulsar-List">http://www.matronic
s.com/Navigator?Pulsar-List href="http://forums.matronics.com">http://for
ums.matronics.com href="http://www.matronics.com/contribution">http://www
.matronics.com/contribution
</blockquote>
==
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 |
|
| Subject: | Re: Fiberglass/ foam undercarriage age. |
Mine collapsed inboard just above the axel. At the time , I had the
supplied pants.
Ray Pulsar III/3300
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of
barrynorman@comcast.net
Sent: Friday, August 24, 2012 6:40 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I have a Pulsar III with the fiberglass gear and they are wrapped with
carbon fiber all the way down to about 2 inches form the end. The last
two inches I wrapped with several revolutions of 2 inch glass tape to
try to prevent splitting. To this point I have never had a problem and I
have my own custom build wheel pants and gear leg fairings installed
with no vents.
Are the legs collapsing outward when it happens?
Barry
_____
>
Sent: Friday, August 24, 2012 2:34:34 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I had the wheel pants on.
Carlos Pulsar III
On Aug 23, 2012, at 1:14 PM, Larry Wheat <lwheat2083@gmail.com> wrote:
Carlos, did you have your wheel pants on or off. Cheers, Larry N852LW
On Thu, Aug 23, 2012 at 11:33 AM, Pulsar747N <pulsar747n@yahoo.com>
wrote:
I also had the same problem with the glass gear including the carbon
wrap mod. I was doing high speed test runs and the excessive heat
generated by the brakes collapsed the left leg about 2 inches up from
the upper brake holes.
I have not done anything yet but I am soon faced with replacing the gear
with the Grove.
Carlos, Pulsar III / Aeromax
_____
From: Ray Wilhelm <rwilhelm@dc.rr.com>
Sent: Thursday, August 23, 2012 7:42 AM
Subject: RE: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I don't have the details. It was 2 or 3 laps around the lower legs up to
about 18 inches from where the axel is fitted, I think. I don't have the
glass gear anymore. I was the first to install a Grove gear many years
ago.
The glass gear collapsed from excessive heat soak back from doing fast
landing tests.
Ray Pulsar III/3300
-----Original Message-----
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of mjb777
Sent: Thursday, August 23, 2012 1:00 AM
Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
rwilhelm(at)dc.rr.com <http://dc.rr.com/> wrote:
> There was also a mod to the Glass gear by Skystar for the Pulsar III.
> It added carbon fiber to the gear legs to stiffen the gear legs. They
> have a tendency to shimmy when landing faster than normal.
>
> Ray Pulsar III/3300
>
>
>
>
> --
Ray do you have any details of this carbon fibre modification? Was it to
the
whole gear or specific areas?
Does your Pulsar 3 have a wood or composite spar?
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381581#3ronics.com/Navigato
r?Pulsar-List" target="_blank">http://www.matronics.co
<http://www.matronics.co/>
=======================
arget="_blank">http://www.matronics.com/Navigator?Pulsar-List
ttp://forums.matronics.com _blank">http://www.matronics.com/contribution
--
Larry Wheat
href="http://www.matronics.com/Navigator?Pulsar-List">http://www.matron
ics.com/Navigator?Pulsar-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
ontribution
= --> http://www.matronics.com/Navigator?Pulsar-List
; http://forums.matronics.com <http://forums.matronics.com/>
blank>http://www.matronics.com/contribution
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 |
|
| Subject: | Re: Fiberglass/ foam undercarriage age. |
The best solution to the heating up of the lower U/C leg is not to brake
so hard! Landing at 100mph and braking hard seems utterly pointless to
me when the Pulsar will land safely at 65mph and slow down relatively
easily with light braking. My XP tail-dragger had the glass leg without
any problems at all, flying from a 1500 foot grass strip and rarely
using more than half of it. My 4.5=9D Azusa internal drum brakes
are too weedy to cause much heat anyway, let alone rapid slowing down.
Energy (speed) management in the approach and flare should be the key to
stopping quickly, not hard braking =93 you learn that with a
tail-dragger or you stuff it on it's nose!
My gear did eventually fail, but only because a sheep wrapped its neck
around it during one fateful landing. The sheep died saving me having to
kill it myself in revenge. The gear leg finally cracked some months
later at the top mounting point. I now have the Pulsar
=98lite=99 Grove one piece gear installed which was not much
heavier than the original solid glass gear and is not noticeably
different to land on or taxi with.
Barry
G-XPXP 912 Tail-dragger UK
From: mjb777
Sent: Friday, August 24, 2012 7:07 AM
Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
Interesting to read about the fiberglass gear structural issues due to
general wear and tear and also the possible thermal problem from the
brakes also. I Think I may have a $40 solution.
I'd like to recommend an amazing product I have used for years, which is
BVM, (Bob Violett Models), "Heat Shield Paint". I know what you may
think when the word "models" comes into it, (not the nice ones that
prance around either), but honestly this stuff is amazing! I used it a
lot on my turbine powered model jets and it really was incredible how
this ceramic paint reflected heat and kept structure cool even when the
structure or skin was mm from the engine. It sticks like the proverbial
and is feather light, and cheap also!!
There are probably tons of other places this could be used in composite
or otherwise homebuilts but I'd say at a glance that this would be very
worthwhile painted on the face of the Fiberglass gear leg that it
subjected to radiation heat from the brakes. Some reinforced ventilation
slots or holes in the top of the pants would generate convection through
the pant also.
Check out the BVM website.
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381665#381665
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: Fiberglass/ foam undercarriage age. |
I just like to know the limits in case they are needed.
Ray
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of Barry J
Edwards
Sent: Friday, August 24, 2012 7:12 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
The best solution to the heating up of the lower U/C leg is not to brake
so hard! Landing at 100mph and braking hard seems utterly pointless to
me when the Pulsar will land safely at 65mph and slow down relatively
easily with light braking. My XP tail-dragger had the glass leg without
any problems at all, flying from a 1500 foot grass strip and rarely
using more than half of it. My 4.5=9D Azusa internal drum brakes
are too weedy to cause much heat anyway, let alone rapid slowing down.
Energy (speed) management in the approach and flare should be the key to
stopping quickly, not hard braking =93 you learn that with a
tail-dragger or you stuff it on it's nose!
My gear did eventually fail, but only because a sheep wrapped its neck
around it during one fateful landing. The sheep died saving me having to
kill it myself in revenge. The gear leg finally cracked some months
later at the top mounting point. I now have the Pulsar
=98lite=99 Grove one piece gear installed which was not much
heavier than the original solid glass gear and is not noticeably
different to land on or taxi with.
Barry
G-XPXP 912 Tail-dragger UK
From: mjb777 <mailto:mattbrock777@gmail.com>
Sent: Friday, August 24, 2012 7:07 AM
Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
Interesting to read about the fiberglass gear structural issues due to
general wear and tear and also the possible thermal problem from the
brakes also. I Think I may have a $40 solution.
I'd like to recommend an amazing product I have used for years, which is
BVM, (Bob Violett Models), "Heat Shield Paint". I know what you may
think when the word "models" comes into it, (not the nice ones that
prance around either), but honestly this stuff is amazing! I used it a
lot on my turbine powered model jets and it really was incredible how
this ceramic paint reflected heat and kept structure cool even when the
structure or skin was mm from the engine. It sticks like the proverbial
and is feather light, and cheap also!!
There are probably tons of other places this could be used in composite
or otherwise homebuilts but I'd say at a glance that this would be very
worthwhile painted on the face of the Fiberglass gear leg that it
subjected to radiation heat from the brakes. Some reinforced ventilation
slots or holes in the top of the pants would generate convection through
the pant also.
Check out the BVM website.
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381665#381665
<http://forums.matronics.com/viewtopic.php?p=381665#381665<nbsp>
<nbsp; Navigator Photoshare, and p; the Web
========================<
; generous bsp;
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 |
|
| Subject: | Re: Fiberglass/ foam undercarriage age. |
I would like to point out that when arriving at a field that has a DA of
10,000 ft the ground speed can easily approach 100. We see this at
times in the summer at Big Bear etc.
Ray
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of Barry J
Edwards
Sent: Friday, August 24, 2012 7:12 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
The best solution to the heating up of the lower U/C leg is not to brake
so hard! Landing at 100mph and braking hard seems utterly pointless to
me when the Pulsar will land safely at 65mph and slow down relatively
easily with light braking. My XP tail-dragger had the glass leg without
any problems at all, flying from a 1500 foot grass strip and rarely
using more than half of it. My 4.5=9D Azusa internal drum brakes
are too weedy to cause much heat anyway, let alone rapid slowing down.
Energy (speed) management in the approach and flare should be the key to
stopping quickly, not hard braking =93 you learn that with a
tail-dragger or you stuff it on it's nose!
My gear did eventually fail, but only because a sheep wrapped its neck
around it during one fateful landing. The sheep died saving me having to
kill it myself in revenge. The gear leg finally cracked some months
later at the top mounting point. I now have the Pulsar
=98lite=99 Grove one piece gear installed which was not much
heavier than the original solid glass gear and is not noticeably
different to land on or taxi with.
Barry
G-XPXP 912 Tail-dragger UK
From: mjb777 <mailto:mattbrock777@gmail.com>
Sent: Friday, August 24, 2012 7:07 AM
Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
Interesting to read about the fiberglass gear structural issues due to
general wear and tear and also the possible thermal problem from the
brakes also. I Think I may have a $40 solution.
I'd like to recommend an amazing product I have used for years, which is
BVM, (Bob Violett Models), "Heat Shield Paint". I know what you may
think when the word "models" comes into it, (not the nice ones that
prance around either), but honestly this stuff is amazing! I used it a
lot on my turbine powered model jets and it really was incredible how
this ceramic paint reflected heat and kept structure cool even when the
structure or skin was mm from the engine. It sticks like the proverbial
and is feather light, and cheap also!!
There are probably tons of other places this could be used in composite
or otherwise homebuilts but I'd say at a glance that this would be very
worthwhile painted on the face of the Fiberglass gear leg that it
subjected to radiation heat from the brakes. Some reinforced ventilation
slots or holes in the top of the pants would generate convection through
the pant also.
Check out the BVM website.
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381665#381665
<http://forums.matronics.com/viewtopic.php?p=381665#381665<nbsp>
<nbsp; Navigator Photoshare, and p; the Web
========================<
; generous bsp;
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 |
|
| Subject: | Upper Rudder Hinge Reinforcement. |
Over the years, I have watched my upper rudder hinge develop more and
more play and now finally decided to fix it. I am rather upset at the
poor design of it and how it is almost impossible to install. I don=92t
know if they are all the same, but mine consists of two sheet metal
tabs, about 0.04=94 thick, the lower one with a nutplate. This material
is too thin to be of much use as a bearing. The hole in the upper side
of the rudder is the only access and any hardware dropped in there is
impossible to get back out without major trouble.
When I tried to insert the original bolt (I=92m not sure how one is
supposed to do that since the hole is too small to even get a socket
in), it fell into the rudder.
To improve the situation, I redesigned that hinge for proper function
as a bearing and easy installation. I reinforced the stabilizer side
by removing the original nut plate, bonding a 1/8=94 thick plate of
glass laminate underneath the metal tab and holding it in place by 5
plies glass, extending 3=94 down on the stabilizer. I bonded a new
nutplate (1/4=94) underneath this.
On the rudder, I made a bushing with a threaded portion on the lower
side and a =BC=94 ID for the bolt. It is long enough (upward) that the
bolt can be inserted without risk of dropping it into the rudder. The
hole in the rudder tab is enlarged to fit the bushing, which is held
in place by the nut and also bonded in. The upper end has a slot to be
able to turn it with a screwdriver during installation.
The bolt (=BC=94, hex) is much longer now. I retained the slot in the head
to be able to use a screwdriver instead of a socket for installation.
The bolt is held by safety wire on the lower end from backing out.
This design has plenty of bearing surface and should not develop play.
It is very easy to install it.
Anyone working on building these parts should close off the rudder
structure below those holes to prevent hardware from falling in.
I have shown what I did in the attached sketch (I hope it stays attached).
Sonja
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 |
|
| Subject: | Re: Fiberglass/ foam undercarriage age. |
Fair point, we don=99t have anything at 10,000ft in the UK except
more cloud!
Barry
From: Ray Wilhelm
Sent: Friday, August 24, 2012 3:23 PM
Subject: RE: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I would like to point out that when arriving at a field that has a DA of
10,000 ft the ground speed can easily approach 100. We see this at
times in the summer at Big Bear etc.
Ray
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of Barry J
Edwards
Sent: Friday, August 24, 2012 7:12 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
The best solution to the heating up of the lower U/C leg is not to brake
so hard! Landing at 100mph and braking hard seems utterly pointless to
me when the Pulsar will land safely at 65mph and slow down relatively
easily with light braking. My XP tail-dragger had the glass leg without
any problems at all, flying from a 1500 foot grass strip and rarely
using more than half of it. My 4.5=9D Azusa internal drum brakes
are too weedy to cause much heat anyway, let alone rapid slowing down.
Energy (speed) management in the approach and flare should be the key to
stopping quickly, not hard braking =93 you learn that with a
tail-dragger or you stuff it on it's nose!
My gear did eventually fail, but only because a sheep wrapped its neck
around it during one fateful landing. The sheep died saving me having to
kill it myself in revenge. The gear leg finally cracked some months
later at the top mounting point. I now have the Pulsar
=98lite=99 Grove one piece gear installed which was not much
heavier than the original solid glass gear and is not noticeably
different to land on or taxi with.
Barry
G-XPXP 912 Tail-dragger UK
From: mjb777
Sent: Friday, August 24, 2012 7:07 AM
Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
Interesting to read about the fiberglass gear structural issues due to
general wear and tear and also the possible thermal problem from the
brakes also. I Think I may have a $40 solution.
I'd like to recommend an amazing product I have used for years, which is
BVM, (Bob Violett Models), "Heat Shield Paint". I know what you may
think when the word "models" comes into it, (not the nice ones that
prance around either), but honestly this stuff is amazing! I used it a
lot on my turbine powered model jets and it really was incredible how
this ceramic paint reflected heat and kept structure cool even when the
structure or skin was mm from the engine. It sticks like the proverbial
and is feather light, and cheap also!!
There are probably tons of other places this could be used in composite
or otherwise homebuilts but I'd say at a glance that this would be very
worthwhile painted on the face of the Fiberglass gear leg that it
subjected to radiation heat from the brakes. Some reinforced ventilation
slots or holes in the top of the pants would generate convection through
the pant also.
Check out the BVM website.
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381665#381665<nbsp;
Navigator Photoshare, and p; the Web
========================<
; generous bsp;
http://www.matronics.com/Navigator?Pulsar-Listhttp://forums.matronics.com
http://www.matronics.com/contribution
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: Upper Rudder Hinge Reinforcement. |
Hi Sonja,
I agree the original design was not very robust. Mine also has some play
in it after 20 years of flying but it does not seem to have got any
worse in the last 18 years! The original top =91bolt=92 was a cross head
machine screw in my kit which I can insert with a cross head screw
driver with a dab of silicone adhesive on it to hold the two together
during insertion and removal. One day I=92ll get around to a fix similar
to yours. Thanks for the ideas.
Barry
G-XPXP 912 Tail-dragger UK 1030hrs
From: Sonja Englert
Sent: Friday, August 24, 2012 3:30 PM
Subject: Pulsar-List: Upper Rudder Hinge Reinforcement.
Over the years, I have watched my upper rudder hinge develop more and
more play and now finally decided to fix it. I am rather upset at the
poor design of it and how it is almost impossible to install. I don=92t
know if they are all the same, but mine consists of two sheet metal
tabs, about 0.04=94 thick, the lower one with a nutplate. This material
is too thin to be of much use as a bearing. The hole in the upper side
of the rudder is the only access and any hardware dropped in there is
impossible to get back out without major trouble.
When I tried to insert the original bolt (I=92m not sure how one is
supposed to do that since the hole is too small to even get a socket
in), it fell into the rudder.
To improve the situation, I redesigned that hinge for proper function
as a bearing and easy installation. I reinforced the stabilizer side
by removing the original nut plate, bonding a 1/8=94 thick plate of
glass laminate underneath the metal tab and holding it in place by 5
plies glass, extending 3=94 down on the stabilizer. I bonded a new
nutplate (1/4=94) underneath this.
On the rudder, I made a bushing with a threaded portion on the lower
side and a =BC=94 ID for the bolt. It is long enough (upward) that the
bolt can be inserted without risk of dropping it into the rudder. The
hole in the rudder tab is enlarged to fit the bushing, which is held
in place by the nut and also bonded in. The upper end has a slot to be
able to turn it with a screwdriver during installation.
The bolt (=BC=94, hex) is much longer now. I retained the slot in the
head
to be able to use a screwdriver instead of a socket for installation.
The bolt is held by safety wire on the lower end from backing out.
This design has plenty of bearing surface and should not develop play.
It is very easy to install it.
Anyone working on building these parts should close off the rudder
structure below those holes to prevent hardware from falling in.
I have shown what I did in the attached sketch (I hope it stays
attached).
Sonja
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: | Re: Upper Rudder Hinge Reinforcement. |
Sonja, and others,
The upper rudder hinge was recognised as a potential problem a long time
ago, in fact while I was still building. I closed off the rudder around
and below the hinge to prevent water getting in there, and of course it
also prevents any bits falling down inside the rudder.
Some of us modified the rudder hinge to include a nylon bushing. I found
a source locally and supplied quite e number to other builders about
that time. The hinge is still held together with a 1/4 screw. I used a
SS cap screw and can check the tension from time to time using an allen
key. I've not found any play in the bearing in nearly 500 hours, and
only very occasionally does the cap screw need a little tweak.
I'll attach a sketch of the arrangement, but I suspect it won't travel
with the e-mail. If it doesn't go I ail happily send it to anyone who
asks.
Brian
On 25/08/2012, at 2:30 AM, Sonja Englert <paqs345@gmail.com> wrote:
> Over the years, I have watched my upper rudder hinge develop more and
> more play and now finally decided to fix it. I am rather upset at the
> poor design of it and how it is almost impossible to install. I don=92t
> know if they are all the same, but mine consists of two sheet metal
> tabs, about 0.04=94 thick, the lower one with a nutplate. This
material
> is too thin to be of much use as a bearing. The hole in the upper side
> of the rudder is the only access and any hardware dropped in there is
> impossible to get back out without major trouble.
>
> When I tried to insert the original bolt (I=92m not sure how one is
> supposed to do that since the hole is too small to even get a socket
> in), it fell into the rudder.
>
> To improve the situation, I redesigned that hinge for proper function
> as a bearing and easy installation. I reinforced the stabilizer side
> by removing the original nut plate, bonding a 1/8=94 thick plate of
> glass laminate underneath the metal tab and holding it in place by 5
> plies glass, extending 3=94 down on the stabilizer. I bonded a new
> nutplate (1/4=94) underneath this.
>
> On the rudder, I made a bushing with a threaded portion on the lower
> side and a =BC=94 ID for the bolt. It is long enough (upward) that the
> bolt can be inserted without risk of dropping it into the rudder. The
> hole in the rudder tab is enlarged to fit the bushing, which is held
> in place by the nut and also bonded in. The upper end has a slot to be
> able to turn it with a screwdriver during installation.
>
> The bolt (=BC=94, hex) is much longer now. I retained the slot in the
head
> to be able to use a screwdriver instead of a socket for installation.
> The bolt is held by safety wire on the lower end from backing out.
> This design has plenty of bearing surface and should not develop play.
> It is very easy to install it.
>
> Anyone working on building these parts should close off the rudder
> structure below those holes to prevent hardware from falling in.
>
> I have shown what I did in the attached sketch (I hope it stays
attached).
>
> Sonja
> <Rudderhinge.JPG>
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: | Re: Fiberglass/ foam undercarriage age. |
Mine collapsed outboard just above the axel. It did not collapsed during th
e the high speed test, but as soon as I got back to the hangar.
Carlos
On Aug 24, 2012, at 7:06 AM, "Ray Wilhelm" <rwilhelm@dc.rr.com> wrote:
> Mine collapsed inboard just above the axel. At the time , I had the suppl
ied pants.
>
> Ray Pulsar III/3300
>
>
> From: owner-pulsar-list-server@matronics.com [mailto:owner-pulsar-list-ser
ver@matronics.com] On Behalf Of barrynorman@comcast.net
> Sent: Friday, August 24, 2012 6:40 AM
> To: pulsar-list@matronics.com
> Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
>
> I have a Pulsar III with the fiberglass gear and they are wrapped with car
bon fiber all the way down to about 2 inches form the end. The last two inch
es I wrapped with several revolutions of 2 inch glass tape to try to prevent
splitting. To this point I have never had a problem and I have my own custo
m build wheel pants and gear leg fairings installed with no vents.
>
> Are the legs collapsing outward when it happens?
>
> Barry
>
> >
> To: pulsar-list@matronics.com
> Sent: Friday, August 24, 2012 2:34:34 AM
> Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
>
> I had the wheel pants on.
> Carlos Pulsar III
>
>
> On Aug 23, 2012, at 1:14 PM, Larry Wheat <lwheat2083@gmail.com> wrote:
>
> Carlos, did you have your wheel pants on or off. Cheers, Larry N852LW
>
>
>
> On Thu, Aug 23, 2012 at 11:33 AM, Pulsar747N <pulsar747n@yahoo.com> wrote:
> I also had the same problem with the glass gear including the carbon wrap m
od. I was doing high speed test runs and the excessive heat generated by th
e brakes collapsed the left leg about 2 inches up from the upper brake holes
.
> I have not done anything yet but I am soon faced with replacing the gear w
ith the Grove.
> Carlos, Pulsar III / Aeromax
>
> From: Ray Wilhelm <rwilhelm@dc.rr.com>
> To: pulsar-list@matronics.com
> Sent: Thursday, August 23, 2012 7:42 AM
> Subject: RE: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
>
>
> I don't have the details. It was 2 or 3 laps around the lower legs up to
> about 18 inches from where the axel is fitted, I think. I don't have the
> glass gear anymore. I was the first to install a Grove gear many years ago
.
> The glass gear collapsed from excessive heat soak back from doing fast
> landing tests.
>
> Ray Pulsar III/3300
>
>
> -----Original Message-----
> From: owner-pulsar-list-server@matronics.com
> [mailto:owner-pulsar-list-server@matronics.com] On Behalf Of mjb777
> Sent: Thursday, August 23, 2012 1:00 AM
> To: pulsar-list@matronics.com
> Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
>
>
>
> rwilhelm(at)dc.rr.com wrote:
> > There was also a mod to the Glass gear by Skystar for the Pulsar III.
> > It added carbon fiber to the gear legs to stiffen the gear legs. They
> > have a tendency to shimmy when landing faster than normal.
> >
> > Ray Pulsar III/3300
> >
> >
> >
> >
> > --
>
>
> Ray do you have any details of this carbon fibre modification? Was it to t
he
> whole gear or specific areas?
>
> Does your Pulsar 3 have a wood or composite spar?
>
> Matt.
>
> --------
> Pulsar 1 TD Kit.
> Captain B777.
> Licenced Aircraft Maintenance Engineer.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=381581#3ronics.com/Navigator
?Pulsar-List" target="_blank">http://www.matronics.co=======
================
>
>
>
>
>
>
> arget="_blank">http://www.matronics.com/Navigator?Pulsar-List
> ttp://forums.matronics.com _blank">http://www.matronics.com/contribution
>
>
>
>
> --
> Larry Wheat
>
>
> href="http://www.matronics.com/Navigator?Pulsar-List">http://www.matroni
cs.com/Navigator?Pulsar-List
> href="http://forums.matronics.com">http://forums.matronics.com
> href="http://www.matronics.com/contribution">http://www.matronics.com/co
ntribution
>
>
>
> = --> http://www.matronics.com/Navigator?Pulsar-List
> ; http://forums.matronics.com
> blank>http://www.matronics.com/contribution
>
>
>
> http://www.matronics.com/Navigator?Pulsar-List
> http://forums.matronics.com
> http://www.matronics.com/contribution
>
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
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 |
|
| Subject: | Re: Fiberglass/ foam undercarriage age. |
It's hard to believe there would be that much heat radiating from the rotor
to soften the glass that much to collapse it. You would think if the brake
s got that hot, it would cook all the grease out of the bearings and transf
er heat to the gear leg via the axle. You would also think the top of the w
heel pants would melt because the heat rises. Was this happening with the C
leveland 5 inch disk brakes?
Barry
----- Original Message -----
From: "Cd" <pulsar747n@yahoo.com>
Sent: Friday, August 24, 2012 3:59:11 PM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
Mine collapsed outboard just above the axel. =C2-It did not collapsed dur
ing the the high speed test, but as soon as I got back to the hangar.
Carlos
On Aug 24, 2012, at 7:06 AM, "Ray Wilhelm" < rwilhelm@dc.rr.com > wrote:
Mine collapsed inboard just above the axel.=C2- At the time , I had the s
upplied pants.
=C2-
Ray=C2-=C2-=C2- Pulsar III/3300
=C2-
=C2-
From: owner-pulsar-list-server@matronics.com [mailto:owner-pulsar-list-serv
er@matronics.com] On Behalf Of barrynorman@comcast.net
Sent: Friday, August 24, 2012 6:40 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
=C2-
I have a Pulsar III with the fiberglass gear and they are wrapped with carb
on fiber all the way down to about 2 inches form the end. The last two inch
es I wrapped with several revolutions of 2 inch glass tape to try to preven
t splitting.=C2-To this point I have never had a problem and I have my ow
n custom build wheel pants and gear leg fairings installed with no vents.
=C2-
Are the legs collapsing outward when it happens?
=C2-
Barry
----- Original Message -----
>
Sent: Friday, August 24, 2012 2:34:34 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I had the wheel pants on.
Carlos Pulsar III
On Aug 23, 2012, at 1:14 PM, Larry Wheat < lwheat2083@gmail.com > wrote:
<blockquote>
Carlos, did you have your wheel pants on or off. Cheers, Larry N852LW
=C2-
On Thu, Aug 23, 2012 at 11:33 AM, Pulsar747N < pulsar747n@yahoo.com > wrote
:
I also had the same problem with the glass gear including the carbon wrap m
od. =C2-I was doing high speed test runs and the=C2-excessive heat gene
rated by the brakes collapsed the left leg about 2 inches up from the upper
brake holes.
I have not done anything yet but I am soon faced with replacing the gear wi
th the Grove.
Carlos, Pulsar III / Aeromax=C2-=C2-
=C2-
From: Ray Wilhelm < rwilhelm@dc.rr.com >
Sent: Thursday, August 23, 2012 7:42 AM
Subject: RE: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I don't have the details. It was 2 or 3 laps around the lower legs up to
about 18 inches from where the axel is fitted, I think. I don't have the
glass gear anymore. I was the first to install a Grove gear many years ago.
The glass gear collapsed from excessive heat soak back from doing fast
landing tests.
Ray=C2- Pulsar III/3300
-----Original Message-----
From: owner-pulsar-list-server@matronics.com
[mailto: owner-pulsar-list-server@matronics.com ] On Behalf Of mjb777
Sent: Thursday, August 23, 2012 1:00 AM
Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
rwilhelm(at) dc.rr.com wrote:
> There was also a mod to the Glass gear by Skystar for the Pulsar III.
> It added carbon fiber to the gear legs to stiffen the gear legs. They
> have a tendency to shimmy when landing faster than normal.
>
> Ray=C2- =C2- =C2- Pulsar III/3300
>
>
>
>
> --
Ray do you have any details of this carbon fibre modification? Was it to th
e
whole gear or specific areas?
Does your Pulsar 3 have a wood or composite spar?
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381581#3ronics.com/Navigator?
Pulsar-List " target="_blank"> http://www.matronics.co ======
==================
=C2- =C2- arget="_blank"> http://www.matronics.com/Navigator?Pulsar-L
ist ttp://forums.matronics.com _blank"> http://www.matronics.com/contributi
on =C2-
--
Larry Wheat =C2- =C2- href=" http://www.matronics.com/Navigator?Pulsa
r-List "> http://www.matronics.com/Navigator?Pulsar-List href=" http://fo
rums.matronics.com "> http://forums.matronics.com href=" http://www.matro
nics.com/contribution "> http://www.matronics.com/contribution =C2-
=C2- =C2- = --> http://www.matronics.com/Navigator?Pulsar-List ; http
://forums.matronics.com blank> http://www.matronics.com/contribution =C2-
=C2- =C2- http://www.matronics.com/Navigator?Pulsar-List http://forums
.matronics.com http://www.matronics.com/contribution =C2- href="http://
www.matronics.com/Navigator?Pulsar-List">http://www.matronics.com/Navigator
?Pulsar-List href="http://forums.matronics.com">http://forums.matronics.c
om href="http://www.matronics.com/contribution">http://www.matronics.com/
contribution
</blockquote>
==
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: Fiberglass/ foam undercarriage age. |
Yes, Cleveland.
And no other damage. Break seals were changed after about 400 hours.
Ray
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of
barrynorman@comcast.net
Sent: Friday, August 24, 2012 1:23 PM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
It's hard to believe there would be that much heat radiating from the
rotor to soften the glass that much to collapse it. You would think if
the brakes got that hot, it would cook all the grease out of the
bearings and transfer heat to the gear leg via the axle. You would also
think the top of the wheel pants would melt because the heat rises. Was
this happening with the Cleveland 5 inch disk brakes?
Barry
_____
From: "Cd" <pulsar747n@yahoo.com>
Sent: Friday, August 24, 2012 3:59:11 PM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
Mine collapsed outboard just above the axel. It did not collapsed
during the the high speed test, but as soon as I got back to the hangar.
Carlos
On Aug 24, 2012, at 7:06 AM, "Ray Wilhelm" <rwilhelm@dc.rr.com> wrote:
Mine collapsed inboard just above the axel. At the time , I had the
supplied pants.
Ray Pulsar III/3300
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of
barrynorman@comcast.net
Sent: Friday, August 24, 2012 6:40 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I have a Pulsar III with the fiberglass gear and they are wrapped with
carbon fiber all the way down to about 2 inches form the end. The last
two inches I wrapped with several revolutions of 2 inch glass tape to
try to prevent splitting. To this point I have never had a problem and I
have my own custom build wheel pants and gear leg fairings installed
with no vents.
Are the legs collapsing outward when it happens?
Barry
_____
>
Sent: Friday, August 24, 2012 2:34:34 AM
Subject: Re: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I had the wheel pants on.
Carlos Pulsar III
On Aug 23, 2012, at 1:14 PM, Larry Wheat <lwheat2083@gmail.com> wrote:
Carlos, did you have your wheel pants on or off. Cheers, Larry N852LW
On Thu, Aug 23, 2012 at 11:33 AM, Pulsar747N <pulsar747n@yahoo.com>
wrote:
I also had the same problem with the glass gear including the carbon
wrap mod. I was doing high speed test runs and the excessive heat
generated by the brakes collapsed the left leg about 2 inches up from
the upper brake holes.
I have not done anything yet but I am soon faced with replacing the gear
with the Grove.
Carlos, Pulsar III / Aeromax
_____
From: Ray Wilhelm <rwilhelm@dc.rr.com>
Sent: Thursday, August 23, 2012 7:42 AM
Subject: RE: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
I don't have the details. It was 2 or 3 laps around the lower legs up to
about 18 inches from where the axel is fitted, I think. I don't have the
glass gear anymore. I was the first to install a Grove gear many years
ago.
The glass gear collapsed from excessive heat soak back from doing fast
landing tests.
Ray Pulsar III/3300
-----Original Message-----
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of mjb777
Sent: Thursday, August 23, 2012 1:00 AM
Subject: Pulsar-List: Re: Fiberglass/ foam undercarriage age.
rwilhelm(at)dc.rr.com <http://dc.rr.com/> wrote:
> There was also a mod to the Glass gear by Skystar for the Pulsar III.
> It added carbon fiber to the gear legs to stiffen the gear legs. They
> have a tendency to shimmy when landing faster than normal.
>
> Ray Pulsar III/3300
>
>
>
>
> --
Ray do you have any details of this carbon fibre modification? Was it to
the
whole gear or specific areas?
Does your Pulsar 3 have a wood or composite spar?
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381581#3ronics.com/Navigato
r?Pulsar-List" target="_blank">http://www.matronics.co
<http://www.matronics.co/>
=======================
arget="_blank">http://www.matronics.com/Navigator?Pulsar-List
ttp://forums.matronics.com _blank">http://www.matronics.com/contribution
--
Larry Wheat
href="http://www.matronics.com/Navigator?Pulsar-List">http://www.matron
ics.com/Navigator?Pulsar-List
href="http://forums.matronics.com <http://forums.matronics.com/>
">http://forums.matronics.com <http://forums.matronics.com/>
href="http://www.matronics.com/contribution">http://www.matronics.com/c
ontribution
= --> http://www.matronics.com/Navigator?Pulsar-List
; http://forums.matronics.com <http://forums.matronics.com/>
blank>http://www.matronics.com/contribution
http://www.matronics.com/Navigator?Pulsar-List
http://forums.matronics.com <http://forums.matronics.com/>
http://www.matronics.com/contribution
href="http://www.matronics.com/Navigator?Pulsar-List">http://www.matron
ics.com/Navigator?Pulsar-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
ontribution
= --> http://www.matronics.com/Navigator?Pulsar-List
; http://forums.matronics.com <http://forums.matronics.com/>
blank>http://www.matronics.com/contribution
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! --
|