Today's Message Index:
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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
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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: 1 Msgs - 01/08/10 |
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:
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> Total Messages Posted Fri 01/08/10: 1
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> 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
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| Subject: | 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&Chapter 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
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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Message 4
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| Subject: | 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
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