Today's Message Index:
----------------------
1. 06:04 AM - Chat (George Race)
2. 08:45 AM - Re: Zenith701801-List Digest: 4 Msgs - 01/10/10 (sam hord)
3. 12:21 PM - Re: Fork tube analysis and prospective stainless steel substitute (Curt Thompson)
4. 01:35 PM - Re: Re: Zenith701801-List Digest: 4 Msgs - 01/10/10 (Mark Sherman)
5. 03:52 PM - Re: Fork tube analysis and prospective stainless steel substitute (JG)
6. 04:55 PM - Bungee discussion (dennkrumm@aol.com)
7. 06:00 PM - Re: Bungee discussion (Chris Blackmore)
8. 07:27 PM - Re: Bungee discussion (Art Gibeaut)
Message 1
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Live Chat Room every Monday evening around 8:00 EDT
www.mykitairplane.com <blocked::http://www.mykitairplane.com/>
Click on the Chat Room link at the top of the page.
George
Message 2
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| Subject: | Re: Zenith701801-List Digest: 4 Msgs - 01/10/10 |
I have seen the bungee in the plans, but didn't like it. I am going with the
push rod. Thank you for your response. If anybody has gone this route please
let us hear about it.
Sam
On Sun, Jan 10, 2010 at 11:58 PM, Zenith701801-List Digest Server <
zenith701801-list@matronics.com> wrote:
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
>
> Today's complete Zenith701801-List Digest can also be found in either of
> the
> two Web Links listed below. The .html file includes the Digest formatted
> in HTML for viewing with a web browser and features Hyperlinked Indexes
> and Message Navigation. The .txt file includes the plain ASCII version
> of the Zenith701801-List Digest and can be viewed with a generic text
> editor
> such as Notepad or with a web browser.
>
> HTML Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 10-01-10&Archive=Zenith701801
>
> Text Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 10-01-10&Archive=Zenith701801
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> Zenith701801-List Digest Archive
> ---
> Total Messages Posted Sun 01/10/10: 4
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 08:56 AM - Chat (George Race)
> 2. 09:41 AM - Re: Zenith701801-List Digest: 1 Msgs - 01/08/10 (sam
> hord)
> 3. 03:26 PM - Re: Re: Zenith701801-List Digest: 1 Msgs - 01/08/10 (Art
> Gibeaut)
> 4. 09:03 PM - Fork tube analysis and prospective stainless steel
> substitute (Curt Thompson)
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 08:56:14 AM PST US
> From: "George Race" <mykitairplane@mrrace.com>
> Subject: Zenith701801-List: Chat
>
> Live Chat Room every Monday evening around 8:00 EDT
>
> www.mykitairplane.com <blocked::http://www.mykitairplane.com/>
>
> Click on the Chat Room link at the top of the page.
> George
>
> ________________________________ Message 2
> _____________________________________
>
>
> Time: 09:41:52 AM PST US
> Subject: Zenith701801-List: Re: Zenith701801-List Digest: 1 Msgs - 01/08/10
> From: sam hord <samhord2@gmail.com>
>
> How are you keeping the elevater cables separated so they do not rub and
> wear?
> Sam
>
> On Fri, Jan 8, 2010 at 11:58 PM, Zenith701801-List Digest Server <
> zenith701801-list@matronics.com> wrote:
>
> > *
> >
> > ================================================
> > Online Versions of Today's List Digest Archive
> > ================================================
> >
> > Today's complete Zenith701801-List Digest can also be found in either of
> > the
> > two Web Links listed below. The .html file includes the Digest formatted
> > in HTML for viewing with a web browser and features Hyperlinked Indexes
> > and Message Navigation. The .txt file includes the plain ASCII version
> > of the Zenith701801-List Digest and can be viewed with a generic text
> > editor
> > such as Notepad or with a web browser.
> >
> > HTML Version:
> >
> >
> >
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter10-01-08&Archive=Zenith701801
> >
> > Text Version:
> >
> >
> >
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter10-01-08&Archive=Zenith701801
> >
> >
> > ==============================================
> > EMail Version of Today's List Digest Archive
> > ==============================================
> >
> >
> > ----------------------------------------------------------
> > Zenith701801-List Digest Archive
> > ---
> > Total Messages Posted Fri 01/08/10: 1
> > ----------------------------------------------------------
> >
> >
> > Today's Message Index:
> > ----------------------
> >
> > 1. 07:57 AM - Re: elevator (Keith Ashcraft)
> >
> >
> > ________________________________ Message 1
> > _____________________________________
> >
> >
> > Time: 07:57:53 AM PST US
> > From: Keith Ashcraft <ch701builder@yahoo.com>
> > Subject: Re: Zenith701801-List: elevator
> >
> > Sam, I have seen and think I have a picture or two, but.... I don't know
> > how or
> > where.
> >
> > Keith
> > CH701 -- scratch
> >
> >
> > ________________________________
> > From: sam hord <samhord2@gmail.com>
> > Sent: Thu, January 7, 2010 5:24:49 PM
> > Subject: Zenith701801-List: elevator
> >
> > Has anybody changed the elevator cables to push rods?
> >
> > Sam
> >
> >
>
> ________________________________ Message 3
> _____________________________________
>
>
> Time: 03:26:15 PM PST US
> From: Art Gibeaut <aagibeaut@yahoo.com>
> Subject: Re: Zenith701801-List: Re: Zenith701801-List Digest: 1 Msgs -
> 01/08/10
>
>
> Zenith uses a bungey on one of the cables attached to the passenger side.
> I'm at
> that stage right now, and several of the guys on this list pointed it out
> to
> me. A picture is in the instructions.
>
> --- On Sun, 1/10/10, sam hord <samhord2@gmail.com> wrote:
>
> > From: sam hord <samhord2@gmail.com>
> > Subject: Zenith701801-List: Re: Zenith701801-List Digest: 1 Msgs -
> 01/08/10
> > To: zenith701801-list@matronics.com
> > Date: Sunday, January 10, 2010, 11:22 AM
> > How are you keeping the elevater cables
> > separated so they do not rub and wear?
> > Sam
> >
> > On Fri, Jan 8, 2010 at 11:58 PM,
> > Zenith701801-List Digest Server <zenith701801-list@matronics.com>
> > wrote:
> >
> > *
> >
> >
> >
> > =======================
> >
> > Online Versions of Today's List Digest Archive
> >
> > =======================
> >
> >
> >
> > Today's complete Zenith701801-List Digest can also be
> > found in either of the
> >
> > two Web Links listed below. The .html file includes the
> > Digest formatted
> >
> > in HTML for viewing with a web browser and features
> > Hyperlinked Indexes
> >
> > and Message Navigation. The .txt file includes the plain
> > ASCII version
> >
> > of the Zenith701801-List Digest and can be viewed with a
> > generic text editor
> >
> > such as Notepad or with a web browser.
> >
> >
> >
> > HTML Version:
> >
> >
> >
> >
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter10-01-08&Archive=Zenith701801
> >
> >
> >
> >
> > Text Version:
> >
> >
> >
> >
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter10-01-08&Archive=Zenith701801
> >
> >
> >
> >
> >
> >
> > ==============================================
> >
> > EMail Version of Today's List Digest Archive
> >
> > ==============================================
> >
> >
> >
> >
> >
> >
> > ----------------------------------------------------------
> >
> > Zenith701801-List
> > Digest Archive
> >
> >
> > ---
> >
> > Total Messages Posted Fri
> > 01/08/10: 1
> >
> >
> > ----------------------------------------------------------
> >
> >
> >
> >
> >
> > Today's Message Index:
> >
> > ----------------------
> >
> >
> >
> > 1. 07:57 AM - Re: elevator (Keith Ashcraft)
> >
> >
> >
> >
> >
> >
> >
> > ________________________________ Message 1
> > _____________________________________
> >
> >
> >
> >
> >
> > Time: 07:57:53 AM PST US
> >
> > From: Keith Ashcraft <ch701builder@yahoo.com>
> >
> > Subject: Re: Zenith701801-List: elevator
> >
> >
> >
> > Sam, I have seen and think I have a picture or two, but....
> > I don't know how or
> >
> > where.
> >
> >
> >
> > Keith
> >
> > CH701 -- scratch
> >
> >
> >
> >
> >
> > ________________________________
> >
> > From: sam hord <samhord2@gmail.com>
> >
> > Sent: Thu, January 7, 2010 5:24:49 PM
> >
> > Subject: Zenith701801-List: elevator
> >
> >
> >
> > Has anybody changed the elevator cables to push rods?
> >
> >
> >
> > Sam
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > =========
> >
> > -List"
> > target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
> >
> > =========
> >
> > http://forums.matronics.com
> >
> > =========
> >
> > le, List Admin.
> >
> > ="_blank">http://www.matronics.com/contribution
> >
> > =========
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> ________________________________ Message 4
> _____________________________________
>
>
> Time: 09:03:42 PM PST US
> From: "Curt Thompson" <Curt.Thompson@verizon.net>
> Subject: Zenith701801-List: Fork tube analysis and prospective stainless
> steel
> substitute
>
> On my plans built CH701, I have been polishing a few of the parts like the
> landing gear and front fork. I was wondering if I could replace the front
> fork tube with stainless steel parts and get a similar look. I would need
> to make sure that the replacement had the same strength as the original.
> So, with the help of my son, we did a SolidWorks analysis of a 4130N tube,
> 2
> inch diameter, 21 inches long with a 0.065" wall. The top is solidly
> anchored and a force is applied horizontally at the bottom. Here is a link
> of the simulation video that SolidWorks made:
>
>
> http://www.youtube.com/watch?v=w8uamuysV_8
>
>
> The video ends when the fork tube fails. It took a force of 540 lbs. As
> you can see, the tube bent a lot before it failed. If you make the fork
> tube stronger you are likely to move the loads elsewhere and it will break
> somewhere else.
>
>
> One thing comes to mind here, if you bend the front axle and lock up the
> wheel you are going to see a lot more than 540lbs. There was a picture
> on
> this list over a year ago that showed a bent fork tube after what was
> claimed to be a normal landing. I don't know how common this problem
> actually is.
>
>
> We substituted the fork tube with T-316L stainless steel in the simulation.
> It took a wall thickness of 0.250" before we arrived at a similar result.
> Since that would make the fork tube about four times as heavy, I have
> decided to stay with the 4130N of the plans. I may go up one notch in
> thickness of 4130N though. I might also replace the front axle with a
> solid
> shaft. On the shaft I have now, I machined bushings and welded them in
> place.
>
>
> Curt Thompson
>
> Redmond, WA, USA
>
>
Message 3
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| Subject: | Fork tube analysis and prospective stainless steel |
substitute
Here is a link to the previous thread that has pictures of how the fork tube
bent.
http://forums.matronics.com/viewtopic.php?t=56639
<http://forums.matronics.com/viewtopic.php?t=56639&highlight=weak+701+nose+g
ear> &highlight=weak+701+nose+gear
Curt
Message 4
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| Subject: | Re: Zenith701801-List Digest: 4 Msgs - 01/10/10 |
Sam.
I you are going to use pushrods you will need to change the geometry of
the elevator bell crank. The cables get looser and tighter depending on
the aileron position. That is the reason for the bungee cord, to take
up the slack.
Mark S.
701/912ULS
80 HRS
----- Original Message -----
From: sam hord
To: zenith701801-list@matronics.com
Sent: Monday, January 11, 2010 8:40 AM
Subject: Zenith701801-List: Re: Zenith701801-List Digest: 4 Msgs -
01/10/10
I have seen the bungee in the plans, but didn't like it. I am going
with the push rod. Thank you for your response. If anybody has gone this
route please let us hear about it.
Sam
On Sun, Jan 10, 2010 at 11:58 PM, Zenith701801-List Digest Server
<zenith701801-list@matronics.com> wrote:
*
Online Versions of Today's List Digest Archive
Today's complete Zenith701801-List Digest can also be found in
either of the
two Web Links listed below. The .html file includes the Digest
formatted
in HTML for viewing with a web browser and features Hyperlinked
Indexes
and Message Navigation. The .txt file includes the plain ASCII
version
of the Zenith701801-List Digest and can be viewed with a generic
text editor
such as Notepad or with a web browser.
HTML Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=html&
Chapter 10-01-10&Archive=Zenith701801
Text Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&C
hapter 10-01-10&Archive=Zenith701801
======================
EMail Version of Today's List Digest Archive
======================
----------------------------------------------------------
Zenith701801-List Digest Archive
---
Total Messages Posted Sun 01/10/10: 4
----------------------------------------------------------
Today's Message Index:
----------------------
1. 08:56 AM - Chat (George Race)
2. 09:41 AM - Re: Zenith701801-List Digest: 1 Msgs - 01/08/10
(sam hord)
3. 03:26 PM - Re: Re: Zenith701801-List Digest: 1 Msgs -
01/08/10 (Art Gibeaut)
4. 09:03 PM - Fork tube analysis and prospective stainless steel
substitute (Curt Thompson)
________________________________ Message 1
_____________________________________
Time: 08:56:14 AM PST US
From: "George Race" <mykitairplane@mrrace.com>
Subject: Zenith701801-List: Chat
Live Chat Room every Monday evening around 8:00 EDT
www.mykitairplane.com <blocked::http://www.mykitairplane.com/>
Click on the Chat Room link at the top of the page.
George
________________________________ Message 2
_____________________________________
Time: 09:41:52 AM PST US
Subject: Zenith701801-List: Re: Zenith701801-List Digest: 1 Msgs -
01/08/10
From: sam hord <samhord2@gmail.com>
How are you keeping the elevater cables separated so they do not rub
and
wear?
Sam
On Fri, Jan 8, 2010 at 11:58 PM, Zenith701801-List Digest Server <
zenith701801-list@matronics.com> wrote:
> *
>
>
=======================
> Online Versions of Today's List Digest Archive
>
=======================
>
> Today's complete Zenith701801-List Digest can also be found in
either of
> the
> two Web Links listed below. The .html file includes the Digest
formatted
> in HTML for viewing with a web browser and features Hyperlinked
Indexes
> and Message Navigation. The .txt file includes the plain ASCII
version
> of the Zenith701801-List Digest and can be viewed with a generic
text
> editor
> such as Notepad or with a web browser.
>
> HTML Version:
>
>
>
http://www.matronics.com/digest/digestview.php?Style=82701&View=html&
Chapter 10-01-08&Archive=Zenith701801
>
> Text Version:
>
>
>
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&C
hapter 10-01-08&Archive=Zenith701801
>
>
>
=====================
> EMail Version of Today's List Digest Archive
>
=====================
>
>
>
----------------------------------------------------------
> Zenith701801-List Digest Archive
> ---
> Total Messages Posted Fri 01/08/10: 1
>
----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 07:57 AM - Re: elevator (Keith Ashcraft)
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 07:57:53 AM PST US
> From: Keith Ashcraft <ch701builder@yahoo.com>
> Subject: Re: Zenith701801-List: elevator
>
> Sam, I have seen and think I have a picture or two, but.... I
don't know
> how or
> where.
>
> Keith
> CH701 -- scratch
>
>
> ________________________________
> From: sam hord <samhord2@gmail.com>
> Sent: Thu, January 7, 2010 5:24:49 PM
> Subject: Zenith701801-List: elevator
>
> Has anybody changed the elevator cables to push rods?
>
> Sam
>
>
________________________________ Message 3
_____________________________________
Time: 03:26:15 PM PST US
From: Art Gibeaut <aagibeaut@yahoo.com>
Subject: Re: Zenith701801-List: Re: Zenith701801-List Digest: 1 Msgs
- 01/08/10
Zenith uses a bungey on one of the cables attached to the passenger
side. I'm at
that stage right now, and several of the guys on this list pointed
it out to
me. A picture is in the instructions.
--- On Sun, 1/10/10, sam hord <samhord2@gmail.com> wrote:
> From: sam hord <samhord2@gmail.com>
> Subject: Zenith701801-List: Re: Zenith701801-List Digest: 1 Msgs -
01/08/10
> To: zenith701801-list@matronics.com
> Date: Sunday, January 10, 2010, 11:22 AM
> How are you keeping the elevater cables
> separated so they do not rub and wear?
> Sam
>
> On Fri, Jan 8, 2010 at 11:58 PM,
> Zenith701801-List Digest Server <zenith701801-list@matronics.com>
> wrote:
>
> *
>
>
>
>
=======================
>
> Online Versions of Today's List Digest Archive
>
>
=======================
>
>
>
> Today's complete Zenith701801-List Digest can also be
> found in either of the
>
> two Web Links listed below. The .html file includes the
> Digest formatted
>
> in HTML for viewing with a web browser and features
> Hyperlinked Indexes
>
> and Message Navigation. The .txt file includes the plain
> ASCII version
>
> of the Zenith701801-List Digest and can be viewed with a
> generic text editor
>
> such as Notepad or with a web browser.
>
>
>
> HTML Version:
>
>
>
>
http://www.matronics.com/digest/digestview.php?Style=82701&View=html&
Chapter 10-01-08&Archive=Zenith701801
>
>
>
>
> Text Version:
>
>
>
>
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&C
hapter 10-01-08&Archive=Zenith701801
>
>
>
>
>
>
>
=====================
>
> EMail Version of Today's List Digest Archive
>
>
=====================
>
>
>
>
>
>
> ----------------------------------------------------------
>
> Zenith701801-List
> Digest Archive
>
>
> ---
>
> Total Messages Posted Fri
> 01/08/10: 1
>
>
> ----------------------------------------------------------
>
>
>
>
>
> Today's Message Index:
>
> ----------------------
>
>
>
> 1. 07:57 AM - Re: elevator (Keith Ashcraft)
>
>
>
>
>
>
>
> ________________________________ Message 1
> _____________________________________
>
>
>
>
>
> Time: 07:57:53 AM PST US
>
> From: Keith Ashcraft <ch701builder@yahoo.com>
>
> Subject: Re: Zenith701801-List: elevator
>
>
>
> Sam, I have seen and think I have a picture or two, but....
> I don't know how or
>
> where.
>
>
>
> Keith
>
> CH701 -- scratch
>
>
>
>
>
> ________________________________
>
> From: sam hord <samhord2@gmail.com>
>
> Sent: Thu, January 7, 2010 5:24:49 PM
>
> Subject: Zenith701801-List: elevator
>
>
>
> Has anybody changed the elevator cables to push rods?
>
>
>
> Sam
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> =========
>
> -List"
>
target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
>
> =========
>
> http://forums.matronics.com
>
> =========
>
> le, List Admin.
>
> ="_blank">http://www.matronics.com/contribution
>
> =========
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
________________________________ Message 4
_____________________________________
Time: 09:03:42 PM PST US
From: "Curt Thompson" <Curt.Thompson@verizon.net>
Subject: Zenith701801-List: Fork tube analysis and prospective
stainless steel
substitute
On my plans built CH701, I have been polishing a few of the parts
like the
landing gear and front fork. I was wondering if I could replace the
front
fork tube with stainless steel parts and get a similar look. I
would need
to make sure that the replacement had the same strength as the
original.
So, with the help of my son, we did a SolidWorks analysis of a 4130N
tube, 2
inch diameter, 21 inches long with a 0.065" wall. The top is
solidly
anchored and a force is applied horizontally at the bottom. Here is
a link
of the simulation video that SolidWorks made:
http://www.youtube.com/watch?v=w8uamuysV_8
The video ends when the fork tube fails. It took a force of 540
lbs. As
you can see, the tube bent a lot before it failed. If you make the
fork
tube stronger you are likely to move the loads elsewhere and it will
break
somewhere else.
One thing comes to mind here, if you bend the front axle and lock up
the
wheel you are going to see a lot more than 540lbs. There was a
picture on
this list over a year ago that showed a bent fork tube after what
was
claimed to be a normal landing. I don't know how common this
problem
actually is.
We substituted the fork tube with T-316L stainless steel in the
simulation.
It took a wall thickness of 0.250" before we arrived at a similar
result.
Since that would make the fork tube about four times as heavy, I
have
decided to stay with the 4130N of the plans. I may go up one notch
in
thickness of 4130N though. I might also replace the front axle with
a solid
shaft. On the shaft I have now, I machined bushings and welded them
in
place.
Curt Thompson
Redmond, WA, USA
==========
-List"
target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
==========
http://forums.matronics.com
==========
le, List Admin.
="_blank">http://www.matronics.com/contribution
==========
Message 5
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|
| Subject: | Re: Fork tube analysis and prospective stainless steel |
substitute
I once helped re-build a 701 that had hit a fence on take-off. A heavier
nose leg had been fitted, causing the firewall to be damaged as well.
Replacing the firewall is a MAJOR job........ A new nose leg and prop are
much easier and less costly......
Don't know how you can bend a nose leg on a 701, even in a heavy landing
scenario. The nose wheel should be way high off the ground at landing AofA,
and the weight distribution should be such that you can hold the nose up
after the mains take the weight. The vertical CofG of the aircraft is quite
high, such that at the AofA at touchdown it effectively moves back and the
aircraft nearly balances on the mains at that attitude. If you can't hold
the nose up and it comes down hard, then either the horizontal CofG is way
forward, or the main gear is canted back somewhat. The 'angle of dangle' of
the main gear is often not noticed, but can vary due to wear or improper
fitting of those rubber blocks. If the gear is angled back just a bit it
puts much more load on the nose wheel. For real STOL use, especially on
rough strips, it's best to try to have the weight on the nose wheel to be
minimum. Fully loaded to aft CofG, if someone pulls the tail down to the
ground, it should just about stay there. The angle of the main gear can be
adjusted, often by just reversing those rubber blocks, or if necessary by
grinding a slight taper on them with a course sanding disc in an angle
grinder. But of course, first must get the CofG of the aircraft correct, by
weight and balance measurements.
JG
www.stolspeed.com
On Tue, Jan 12, 2010 at 7:18 AM, Curt Thompson <Curt.Thompson@verizon.net>wrote:
> Here is a link to the previous thread that has pictures of how the fork
> tube bent.
>
>
> http://forums.matronics.com/viewtopic.php?t=56639&highlight=weak+701+nose+gear
>
>
> Curt
>
>
> *
>
> *
>
>
Message 6
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| Subject: | Bungee discussion |
Sam - I am building an 801 and have questioned my EAA Tech Adviser on a
different way to separate the elevator cables (and rudder cables) from ru
bbing together. He pointed out how ultra-lights have been avoiding the ru
bbing of controls cables since their inception by threading the cables thr
ough a piece of high strength, high density plastic tubing. A lot of ultr
a cables are complete encased in tubing - thus preventing any wear on the
cable itself. He recommend placing the tubing where the cables cross pat
hs. The tubing I.D. (inner dia.) should be slightly larger than the cable
diameter.
There are three ways to anchor the tubing: 1) Where the tubing crosses
and creates an "X" pattern, put two cable ties in the middle of the "X",
one over the other in their own "X" pattern. This locks the tubes from
moving up and down the cable. 2) Build a support bracket at the "X" and
attach the center of the "X" on the bracket. And 3) (if your cables are
not continuously in contact with each other) Secure the tubing onto the
cable to keep it from moving, but use a long enough piece of tubing that
when the cables do touch, the tubing is at that location (+ or - a foot
or so). You will then get contact with the tubes - not the cables.
This sounds like it should work pretty slick and I hope to use it for my
801 when I get to that stage in the building process. My rudder cables
will now have a more direct routing to the rudder horns without any sligh
t "detours", as is their current path through the fuselage. Hope you find
this helps.
Dennis Krummel N801DK
PS - I plan on using the hydraulic tubing. It is very strong and has good
resistance to wear.
-----Original Message-----
From: sam hord <samhord2@gmail.com>
Sent: Sun, Jan 10, 2010 9:22 am
Subject: Zenith701801-List: Re: Zenith701801-List Digest: 1 Msgs - 01/08/1
0
How are you keeping the elevater cables separated so they do not rub and
wear?
Sam
Message 7
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| Subject: | Re: Bungee discussion |
Try corelon ( spelling) truck air brake lines
-------Original Message-------
From: dennkrumm@aol.com
Subject: Zenith701801-List: Bungee discussion
Sam - I am building an 801 and have questioned my EAA Tech Adviser on a
different way to separate the elevator cables (and rudder cables) from
rubbing together. He pointed out how ultra-lights have been avoiding the
rubbing of controls cables since their inception by threading the cables
through a piece of high strength, high density plastic tubing. A lot of
ultra cables are complete encased in tubing - thus preventing any wear on
the cable itself. He recommend placing the tubing where the cables cross
paths. The tubing I.D. (inner dia.) should be slightly larger than the
cable diameter.
There are three ways to anchor the tubing: 1) Where the tubing crosse
s
and creates an "X" pattern, put two cable ties in the middle of the "X",
one
over the other in their own "X" pattern. This locks the tubes from movin
g
up and down the cable. 2) Build a support bracket at the "X" and attach
the
center of the "X" on the bracket. And 3) (if your cables are not
continuously in contact with each other) Secure the tubing onto the cab
le
to keep it from moving, but use a long enough piece of tubing that when t
he
cables do touch, the tubing is at that location (+ or - a foot or so). Y
ou
will then get contact with the tubes - not the cables.
This sounds like it should work pretty slick and I hope to use it for m
y
801 when I get to that stage in the building process. My rudder cables w
ill
now have a more direct routing to the rudder horns without any slight
detours", as is their current path through the fuselage. Hope you find t
his
helps.
Dennis Krummel N801DK
PS - I plan on using the hydraulic tubing. It is very strong and has goo
d
resistance to wear.
-----Original Message-----
From: sam hord <samhord2@gmail.com>
Sent: Sun, Jan 10, 2010 9:22 am
Subject: Zenith701801-List: Re: Zenith701801-List Digest: 1 Msgs - 01/08/
10
How are you keeping the elevater cables separated so they do not rub and
wear?
Sam
==========
==========
==========
==========
Message 8
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| Subject: | Re: Bungee discussion |
Sounds like a good plan, but do yourself a favor and do nothing until you rig the
elevator cables, and then experience what happens as you move the stick left
and right. You'll understand at that point. Cables rubbing is a secondary issue.
The primary issue (as pointed out by some else prior) is the fact that the
cables are not centered on the torque tube and will tighten and loosen as the
stick is moved right and left. You need something to take up the slack (bungey)
or you will be chasing this forever. I chased it for 3 nites before I finally
listened to the guys on this list. You need a device to take up the slack,
and rubbing cables will be eliminated when you do that. Just trying to help guys,
and share the mistakes I've made so you don't have to make them. Good luck.
--- On Mon, 1/11/10, dennkrumm@aol.com <dennkrumm@aol.com> wrote:
> From: dennkrumm@aol.com <dennkrumm@aol.com>
> Subject: Zenith701801-List: Bungee discussion
> To: zenith701801-list@matronics.com
> Date: Monday, January 11, 2010, 6:09 PM
>
> Sam - I am building an 801 and have
> questioned my EAA Tech Adviser on a different way to
> separate the elevator cables (and rudder cables) from
> rubbing together. He pointed out how ultra-lights have
> been avoiding the rubbing of controls cables since their
> inception by threading the cables through a piece of high
> strength, high density plastic tubing. A lot of ultra
> cables are complete encased in tubing - thus preventing any
> wear on the cable itself. He recommend placing the
> tubing where the cables cross paths. The tubing I.D.
> (inner dia.) should be slightly larger than the cable
> diameter.
>
> There are three ways to anchor the
> tubing: 1) Where the tubing crosses and creates an
> "X" pattern, put two cable ties in the middle of
> the "X", one over the other in their own
> "X" pattern. This locks the tubes from
> moving up and down the cable. 2) Build a support
> bracket at the "X" and attach the center of the
> "X" on the bracket. And 3) (if your cables
> are not continuously in contact with each other)
> Secure the tubing onto the cable to keep it from moving, but
> use a long enough piece of tubing that when the cables do
> touch, the tubing is at that location (+ or - a foot or
> so). You will then get contact with the tubes - not
> the cables.
>
> This sounds like it should work pretty slick and I
> hope to use it for my 801 when I get to that stage in the
> building process. My rudder cables will now have a
> more direct routing to the rudder horns without any slight
> "detours", as is their current path through the
> fuselage. Hope you find this helps.
>
>
>
> Dennis Krummel N801DK
>
>
>
> PS - I plan on using the hydraulic tubing. It is very
> strong and has good resistance to wear.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> -----Original
> Message-----
>
> From: sam hord <samhord2@gmail.com>
>
> To: zenith701801-list@matronics.com
>
> Sent: Sun, Jan 10, 2010 9:22 am
>
> Subject: Zenith701801-List: Re: Zenith701801-List Digest: 1
> Msgs - 01/08/10
>
>
>
>
>
>
>
>
>
>
>
> How are you keeping the elevater cables separated so they
> do not rub and wear?
>
> Sam
>
>
>
>
>
>
>
>
>
>
>
>
>
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