Today's Message Index:
----------------------
1. 12:54 AM - Re: Bearing thickness, final (Bill Naumuk)
2. 04:46 AM - Re: Re: 601 XL bearing bloc material (Klaus Truemper)
3. 05:28 AM - Re: Re: Re: 601 XL bearing bloc material (Michel Therrien)
4. 06:58 AM - Re: Re: 601 XL bearing bloc material (Jeff Davidson)
5. 06:59 AM - Re: Lower nose gear bearing (Jeff Davidson)
6. 07:48 AM - Re: Re: Lower nose gear bearing (Paul Mulwitz)
7. 09:01 AM - Re: Re: Lower nose gear bearing (mtherr@yahoo.com)
8. 10:47 AM - Longeron to firewall fitting (Was Re: Lower nose gear bearing) (Paul Mulwitz)
9. 07:46 PM - Re: Re: Lower nose gear bearing (Jeff Davidson)
Message 1
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| Subject: | Re: Bearing thickness, final |
On 10/07/2011 07:44 PM, Michel Therrien wrote:
> Bill, I built a CH601HD and I am installing a new engine and making a
> bunch of renovations. One is to put smaller wheels (500X5). I also
> inspected the landing gear parts and found quite a bit of rust.. so I
> sandlasted everything and painted the parts. At the same time, I
> decided to modify the nose wheel assembly to make it like it is on the
> 601XL... The Franlkin engine I'm installing is quite like an O-235;
> heavy... so I want to beef up the parts a bit. I also noticed that
> the lower nose bearing was wearing the landing gear tube... another
> reason to put the lower bearing that the XL has... it is made from a
> 1.496" (I thought it as 1.5" ;-) (notice the simley)) piece of Nyloil
> (thanks to those who provided that info). Nyloil is quite good... it
> absorb 2.5% of its weight max, tensile strenght of 10000 psi (UHMPWE
> is about 1000 psi, 6061-T6 about 42000 psi).
> So, I decided to go with that.
> ----------------------------
> Michel Therrien CH601-HD, C-GZGQ
> http://mthobby.pcperfect.com/ch601
> http://pages.infinit.net/mthobby
> *From:* Bill Naumuk <naumuk@windstream.net>
> *To:* zenith-list@matronics.com
> *Sent:* Friday, October 7, 2011 6:30:05 PM
> *Subject:* Zenith-List: Bearing thickness, final
>
> <mailto:naumuk@windstream.net>>
>
> All-
> Whatever flies your kite.
>
> -- Bill Naumuk
> Zen/Vair nbsp; --> http://forums.matronics.com
> <http://www.matronics.com/Navigator?Zenith-List>
>
>
> *
>
>
> *
Michel-
As I originally said, I picked up on the thread late.
We met briefly a few years ago at Brampford, so I'm not surprised
you're updating. My condolences if you had to pay duty on that huge slab
of plastic. Couldn't you get anything smaller than a square foot?
I've professionally worked with plastics since 1968 so I'm familiar
with their properties.
What alarms me is, you noticed wear on your NOSE GEAR TUBE? Please
say you were running the original plans mandated metal on metal bearings!
While you have everything apart, investigate doing what a builder
named Scott did and have your gear tubes chromed rather than paint them.
I'm psyching myself up to tear everything apart to do it myself.
Bon chance...
Bill
--
Bill Naumuk
Zen/Vair 601MG
Message 2
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| Subject: | Re: Re: 601 XL bearing bloc material |
Hi,
When we built our 601HDS 15 years ago, the bearings for nose gear
and landing gear were specified to be aluminum. Instead, we made
bearings out of Delrin.
Even with that change, we noticed rather soon that the dirt and
sand collecting on the nose gear was wearing not only the Delrin
but also the gear tube. To prevent further damage and reduce
the drag produced by the tube, we made a rather simple nose gear fairing,
see
http://utdallas.edu/~klaus/Airplane/nose_gear_fairing.html
Each year, we remove the fairing during the annual
inspection, clean the tube, add grease, and reinstall
the fairing. That process has eliminated the wear of
the tube and the bearing.
BTW, the 912 Rotax engine has passed 1400 hours,
without any sign of wear except that we have used
four (!) fuel pumps. Let's hope that the new pump design works.
Happy flying,
Klaus
Message 3
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| Subject: | Re: Re: 601 XL bearing bloc material |
How long have your 601 been flying? It is good to read about good longevity
for our aircraft...
Sent from my iPad
On Oct 8, 2011, at 7:44, Klaus Truemper <klaus@utdallas.edu> wrote:
> Hi,
>
> When we built our 601HDS 15 years ago, the bearings for nose gear
> and landing gear were specified to be aluminum. Instead, we made
> bearings out of Delrin.
>
> Even with that change, we noticed rather soon that the dirt and
> sand collecting on the nose gear was wearing not only the Delrin
> but also the gear tube. To prevent further damage and reduce
> the drag produced by the tube, we made a rather simple nose gear fairing,
> see
>
> http://utdallas.edu/~klaus/Airplane/nose_gear_fairing.html
>
> Each year, we remove the fairing during the annual
> inspection, clean the tube, add grease, and reinstall
> the fairing. That process has eliminated the wear of
> the tube and the bearing.
>
> BTW, the 912 Rotax engine has passed 1400 hours,
> without any sign of wear except that we have used
> four (!) fuel pumps. Let's hope that the new pump design works.
>
> Happy flying,
>
> Klaus
>
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
Message 4
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| Subject: | Re: 601 XL bearing bloc material |
-----Original Message-----
From: Jeff Davidson
Sent: Oct 8, 2011 9:53 AM
Subject: RE: Zenith-List: Re: 601 XL bearing bloc material
I have the Zenith supplied part in my hand. It is labeled "75L1-7" and "6G2-1/2"
and "t=(8F8-5)".
Jeff D
-----Original Message-----
From: Craig Payne
Sent: Oct 7, 2011 6:45 PM
Subject: RE: Zenith-List: Re: 601 XL bearing bloc material
> I don't think that the 601 part will fit the 701. Well, thats what I did and
it works. -- Craig
Message 5
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| Subject: | Re: Lower nose gear bearing |
-----Original Message-----
From: Jeff Davidson
Sent: Oct 8, 2011 9:50 AM
Subject: Lower nose gear bearing
During a post Oshkosh pre-flight inspection I noticed that my nose gear bungee
covering was frayed at the rear of the gear leg. Being the cautious type, I decided
to take it apart to find out why and replace the bungee. While I am at
it, I will replace the bottom gear leg bearing too. I currently have the origonal
HD aluminum around steel design per plans. I just ignored the price and
purchased the bearing from Zenith. Thanks for the "threaded rod in the top of
the gear leg" method to replace the bungee! I'll be doing the change this week
and will let you know how it goes.
Jeff Davidson
CH601-HD w/jabiru 3300A
Message 6
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| Subject: | Re: Lower nose gear bearing |
Hi Jeff,
Please take a few pictures of your threaded rod as you install it and
use it to tension the bungee.
One comment on this thread. I have heard several folks say things like
"Is it different on the HD". We must remember that Zenith has never had
any change version control on their models. Many different exact
designs exist for each major design type (701, 601HD, 601XL, etc.). If
you want to know the status of the design used by each builder you
really need to look at the exact copy of drawings they used. Even then
the parts often don't even remotely match the drawing if they were
ordered separately. On my XL this was most noticeable on the upper
engine mount fittings that go just behind the firewall.
Paul
XL in flight test.
On 10/8/2011 6:57 AM, Jeff Davidson wrote:
> --> Zenith-List message posted by: Jeff Davidson<jeffrey_davidson@earthlink.net>
>
> -----Original Message-----
> From: Jeff Davidson
> Sent: Oct 8, 2011 9:50 AM
> To: zenith-list@matronics.com
> Subject: Lower nose gear bearing
>
>
> During a post Oshkosh pre-flight inspection I noticed that my nose gear bungee
covering was frayed at the rear of the gear leg. Being the cautious type, I
decided to take it apart to find out why and replace the bungee. While I am
at it, I will replace the bottom gear leg bearing too. I currently have the origonal
HD aluminum around steel design per plans. I just ignored the price and
purchased the bearing from Zenith. Thanks for the "threaded rod in the top
of the gear leg" method to replace the bungee! I'll be doing the change this
week and will let you know how it goes.
> Jeff Davidson
> CH601-HD w/jabiru 3300A
>
>
Message 7
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| Subject: | Re: Lower nose gear bearing |
Paul, please tell me more about those fittings. This has proven to be a weak point
on my 601HD (version 5 plans).
I made new one with same layout but .080 4130 steel instead of .050.
-----Original Message-----
From: Paul Mulwitz <psm@att.net>
Sender: owner-zenith-list-server@matronics.com
Subject: Re: Zenith-List: Re: Lower nose gear bearing
Hi Jeff,
Please take a few pictures of your threaded rod as you install it and
use it to tension the bungee.
One comment on this thread. I have heard several folks say things like
"Is it different on the HD". We must remember that Zenith has never had
any change version control on their models. Many different exact
designs exist for each major design type (701, 601HD, 601XL, etc.). If
you want to know the status of the design used by each builder you
really need to look at the exact copy of drawings they used. Even then
the parts often don't even remotely match the drawing if they were
ordered separately. On my XL this was most noticeable on the upper
engine mount fittings that go just behind the firewall.
Paul
XL in flight test.
On 10/8/2011 6:57 AM, Jeff Davidson wrote:
> --> Zenith-List message posted by: Jeff Davidson<jeffrey_davidson@earthlink.net>
>
> -----Original Message-----
> From: Jeff Davidson
> Sent: Oct 8, 2011 9:50 AM
> To: zenith-list@matronics.com
> Subject: Lower nose gear bearing
>
>
> During a post Oshkosh pre-flight inspection I noticed that my nose gear bungee
covering was frayed at the rear of the gear leg. Being the cautious type, I
decided to take it apart to find out why and replace the bungee. While I am
at it, I will replace the bottom gear leg bearing too. I currently have the origonal
HD aluminum around steel design per plans. I just ignored the price and
purchased the bearing from Zenith. Thanks for the "threaded rod in the top
of the gear leg" method to replace the bungee! I'll be doing the change this
week and will let you know how it goes.
> Jeff Davidson
> CH601-HD w/jabiru 3300A
>
>
Message 8
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| Subject: | Re: Longeron to firewall fitting (Was Re: Lower nose gear |
bearing)
Here are a few pictures I found of the part delivered to me. I took the
pictures in the last part of 2006 so I must have ordered them some time
before that. I ordered my kit as subkits when I was ready to move on to
each part of the plane.
I don't have my drawings here (they are at the hangar) so I can't tell
you the part number on the drawings. As I recall there was a
significant difference from the part on the drawing and the ones I
received. Sorry, I just don't remember the details of the difference.
I hope this helps,
Paul
XL in flight test
10/8/2011 8:54 AM, mtherr@yahoo.com wrote:
> --> Zenith-List message posted by:mtherr@yahoo.com
>
> Paul, please tell me more about those fittings. This has proven to be a weak
point on my 601HD (version 5 plans).
>
> I made new one with same layout but .080 4130 steel instead of .050.
Message 9
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| Subject: | Re: Lower nose gear bearing |
Paul,
I'll be happy to take some pictures of the bungee cord replacement process. To
me, the defining features of the HD are the bungee cord Main Gear legs and the
thick constant chord wing airfoil. In actuality, my plane has lots of XL parts
in it including the extra firewall supports and stiffeners, a forward hinged
canopy, and a center console. I built over a long time and included new features
as they were introduced. The fairings on the horizontal empenage were
an upgrade kit to the origonal HD for instance. Per plans, there is no fiberglass
fairing, just a blunt aluminum edge. Over time, the configuration of the
firewall has changed a lot too, even within the XL model line.
Jeff D.
-----Original Message-----
>From: mtherr@yahoo.com
>Sent: Oct 8, 2011 11:54 AM
>To: Zenith-list <zenith-list@matronics.com>
>Subject: Re: Zenith-List: Re: Lower nose gear bearing
>
>
>Paul, please tell me more about those fittings. This has proven to be a weak
point on my 601HD (version 5 plans).
>
>I made new one with same layout but .080 4130 steel instead of .050.
>
>-----Original Message-----
>From: Paul Mulwitz <psm@att.net>
>Sender: owner-zenith-list-server@matronics.com
>Date: Sat, 08 Oct 2011 07:45:57
>To: <zenith-list@matronics.com>
>Subject: Re: Zenith-List: Re: Lower nose gear bearing
>
>
>Hi Jeff,
>
>Please take a few pictures of your threaded rod as you install it and
>use it to tension the bungee.
>
>One comment on this thread. I have heard several folks say things like
>"Is it different on the HD". We must remember that Zenith has never had
>any change version control on their models. Many different exact
>designs exist for each major design type (701, 601HD, 601XL, etc.). If
>you want to know the status of the design used by each builder you
>really need to look at the exact copy of drawings they used. Even then
>the parts often don't even remotely match the drawing if they were
>ordered separately. On my XL this was most noticeable on the upper
>engine mount fittings that go just behind the firewall.
>
>Paul
>XL in flight test.
>
>On 10/8/2011 6:57 AM, Jeff Davidson wrote:
>> --> Zenith-List message posted by: Jeff Davidson<jeffrey_davidson@earthlink.net>
>>
>> -----Original Message-----
>> From: Jeff Davidson
>> Sent: Oct 8, 2011 9:50 AM
>> To: zenith-list@matronics.com
>> Subject: Lower nose gear bearing
>>
>>
>>
>>
>>
>>
>> During a post Oshkosh pre-flight inspection I noticed that my nose gear bungee
covering was frayed at the rear of the gear leg. Being the cautious type,
I decided to take it apart to find out why and replace the bungee. While I am
at it, I will replace the bottom gear leg bearing too. I currently have the
origonal HD aluminum around steel design per plans. I just ignored the price
and purchased the bearing from Zenith. Thanks for the "threaded rod in the top
of the gear leg" method to replace the bungee! I'll be doing the change this
week and will let you know how it goes.
>> Jeff Davidson
>> CH601-HD w/jabiru 3300A
>>
>>
>>
>>
>>
>
>
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