Today's Message Index:
----------------------
1. 06:24 AM - push pull tube vs. cable (Mike Schaff)
2. 06:59 AM - elevtor cables (BokKat)
3. 07:02 AM - Re: push pull tube vs. cable (n801bh@netzero.com)
4. 07:20 AM - Re: push pull tube vs. cable (BokKat)
5. 08:43 AM - Re: Zenith701801-List Digest: 8 Msgs - 01/11/10 (sam hord)
6. 10:32 AM - Re: Fork tube analysis and prospective stainless steel substitute (Gary Gower)
7. 10:35 AM - Re: Bungee discussion (Gary Gower)
8. 03:54 PM - Re: Fork tube analysis and prospective stainless steel substitute (BokKat)
9. 04:52 PM - Re: Fork tube analysis and prospective stainless steel substitute (JG)
Message 1
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| Subject: | push pull tube vs. cable |
Has anyone on here used push/pull tubes instead of cable for the control
surfaces. It would appear to be a better method in several aspects.
1. Eliminate the necessity for periodic cable tensioning.
2. Ease of inspection
3. Easier to disassemble and re-assemble
4. Simpler for folding the wings with the folding wing option.
5. More positive feedback of control inputs
I realize that this is a major design change, but I also realize that with
all of the adventurous spirits that we have out there building the 701's,
that several of you have come up with something that works.
Mike
scratch build, just started
Message 2
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I'd sure agree that the bungee system is simple and works well. It
takes a whole 3.5 minutes to put it on, it works well, basically weighs
nothing, and after checking it on a couple of annuals, it will probably
last longer than I will. Even if it failed in flight, nothing bad
would happen, the controls might get a bit sloppy and you'd feel the
cables rubbing, but no big deal.
Push rods to me seem to add weight and complexity, but if you love
tinkering that's what homebuilding is about. Post some pictures if you
get it perfected.
Message 3
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| Subject: | Re: push pull tube vs. cable |
I don't know about the 701 but........
The 801 has pushrods all the way to the flaperons so speeding up the fol
ding wing option seems moot.
The geometry of the elevator and its non symetrical bell crank angles an
d pick up points do not
lead to push rods without a major redesign.
Other then that these things are "experimental" so one can modify to the
ir hearts content.
do not archive.
From: "Mike Schaff" <mschaff@dbdoran.com>
Subject: Zenith701801-List: push pull tube vs. cable
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:of
fice" />
Has anyone on here used push/pull tubes instead of cable for the control
surfaces. It would appear to be a better method in several aspects.
1. Eliminate the necessity for periodic cable tensioning.
2. Ease of inspection
3. Easier to disassemble and re-assemble
4. Simpler for folding the wings with the folding wing option.
5. More positive feedback of control inputs
I realize that this is a major design change, but I also realize that wi
th all of the adventurous spirits that we have out there building the 70
1=92s, that several of you have come up with something that works.
Mike
scratch build, just started
========================
========================
========================
========================
========================
============
____________________________________________________________
Nutrition
Improve your career health. Click now to study nutrition!
http://thirdpartyoffers.netzero.net/TGL2241/c?cp=D5QlSHCpMCoYu5aemGEwh
gAAJ1HJCPpfjg3mPNA79-KnIlAaAAYAAAAAAAAAAAAAAAAAAADNAAAAAAAAAAAAAAAAAAASQ
wAAAAA
Message 4
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| Subject: | Re: push pull tube vs. cable |
Same with the 701. Takes only a few seconds to unhook the flapperons.
Do not archive
----- Original Message -----
From: n801bh@netzero.com
To: zenith701801-list@matronics.com
Sent: Tuesday, January 12, 2010 8:57 AM
Subject: Re: Zenith701801-List: push pull tube vs. cable
I don't know about the 701 but........
The 801 has pushrods all the way to the flaperons so speeding up the
folding wing option seems moot.
The geometry of the elevator and its non symetrical bell crank angles
and pick up points do not
lead to push rods without a major redesign.
Other then that these things are "experimental" so one can modify to
their hearts content.
do not archive.
From: "Mike Schaff" <mschaff@dbdoran.com>
To: <zenith701801-list@matronics.com>
Subject: Zenith701801-List: push pull tube vs. cable
Date: Tue, 12 Jan 2010 08:13:35 -0600
Has anyone on here used push/pull tubes instead of cable for the
control surfaces. It would appear to be a better method in several
aspects.
1. Eliminate the necessity for periodic cable tensioning.
2. Ease of inspection
3. Easier to disassemble and re-assemble
4. Simpler for folding the wings with the folding wing option.
5. More positive feedback of control inputs
I realize that this is a major design change, but I also realize that
with all of the adventurous spirits that we have out there building the
701=92s, that several of you have come up with something that works.
Mike
scratch build, just started
1-List">http://www.matronics.com/Navigator?Zenith701801-List
tronics.com
www.matronics.com/contribution
____________________________________________________________
Nutrition
Improve your career health. Click now to study nutrition!
Message 5
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| Subject: | Re: Zenith701801-List Digest: 8 Msgs - 01/11/10 |
Thanks for all your thoughts on this subject. I will probably go with the
tubing over the cable and keep a check for wear. The movement of the cables
is only about 4.5 in. or so. It probably is not that big of an issue, and
they don't have a lot of force against one another for wear. Thanks again to
everybody.
Sam
On Mon, Jan 11, 2010 at 11:58 PM, Zenith701801-List Digest Server <
zenith701801-list@matronics.com> wrote:
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
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> the
> two Web Links listed below. The .html file includes the Digest formatted
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> such as Notepad or with a web browser.
>
> HTML Version:
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> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 10-01-11&Archive=Zenith701801
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> Text Version:
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>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 10-01-11&Archive=Zenith701801
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> Zenith701801-List Digest Archive
> ---
> Total Messages Posted Mon 01/11/10: 8
> ----------------------------------------------------------
>
>
> 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
> _____________________________________
>
>
> Time: 06:04:51 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: 08:45:11 AM PST US
> Subject: Zenith701801-List: Re: Zenith701801-List Digest: 4 Msgs - 01/10/10
> From: sam hord <samhord2@gmail.com>
>
> 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&Chapter10-01-10&Archive=Zenith701801
> >
> > Text Version:
> >
> >
> >
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter10-01-10&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
> _____________________________________
>
>
> Time: 12:21:48 PM PST US
> From: "Curt Thompson" <Curt.Thompson@verizon.net>
> Subject: RE: Zenith701801-List: 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
> _____________________________________
>
>
> Time: 01:35:16 PM PST US
> From: "Mark Sherman" <n752ms@softcom.net>
> Subject: Re: Zenith701801-List: 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
> _____________________________________
>
>
> Time: 03:52:37 PM PST US
> Subject: Re: Zenith701801-List: Fork tube analysis and prospective
> stainless steel
> substitute
> From: JG <vgstol@bigpond.net.au>
>
> 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
> _____________________________________
>
>
> Time: 04:55:13 PM PST US
> Subject: Zenith701801-List: Bungee discussion
> From: dennkrumm@aol.com
>
>
> 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
> _____________________________________
>
>
> Time: 06:00:43 PM PST US
> From: "Chris Blackmore" <blackmore@platinum.ca>
> Subject: Re: Zenith701801-List: 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
> _____________________________________
>
>
> Time: 07:27:25 PM PST US
> From: Art Gibeaut <aagibeaut@yahoo.com>
> Subject: Re: Zenith701801-List: 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
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
Message 6
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| Subject: | Re: Fork tube analysis and prospective stainless |
steel substitute
Nothing can replace learning and practice...
-
What you need to do is to spend a some time (depends on each one) knowing y
our airplane (and learning to fly a STOL airplane)...
-
When landing hold the nosewheel- up and balance on the main wheel until y
ou cant hold it anymore, then gently with a little elevator and a little po
wer, slowly put the Nose Wheel- on the floor... With a few minutes and us
ing a little of power you can hold the NWl up and travel a lot only on-th
e mains and (with practice) let the NW down gently...
Easyer to do than in a Motorcycle :-)
-
Sometime ago (I think when we had about 100 hrs on the 701) we temporary in
stalled a little wheel where the rear tie down and practice to hold the pla
ne in 3 point (like a tail wheel) then very gently, put the main on the flo
or, even we were able to start rollling and take off from that position (3
point:-)...- Was real fun and we really came up to know or airplane a lot
...- As everything, a little at a time, to not harm the plane or yourself
, practice is the secret.
-
Fun flying...- with care- is...- FUN!
-
This practice will help a lot when landing in rough strips, this prevents t
he nose gear from bouncing up and down (been there, done that),- since th
is type of landing the first time, we decided to learn to balance in the ma
in...
-
Saludos
Gary Gower
701 912S- 285 hrs and counting.
"Sport flying is not just going from point "A" to point "B",- is getting
to know and enjoy your airplane"
--- On Mon, 1/11/10, JG <vgstol@bigpond.net.au> wrote:
From: JG <vgstol@bigpond.net.au>
Subject: Re: Zenith701801-List: Fork tube analysis and prospective stainles
s steel substitute
I once helped re-build a 701 that had hit a fence on take-off. -A-heavi
er 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 sc
enario. -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 a
nd the aircraft nearly balances on the mains at that attitude. -If you ca
n't hold the nose up and it comes down hard, then either the horizontal Cof
G is way forward, or the main gear is canted back somewhat. -The 'angle o
f dangle' of the main gear is often not noticed, but can vary due to wear o
r improper fitting of those rubber blocks. -If the gear is angled back ju
st 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 no
se wheel to be minimum. -Fully loaded to aft CofG, if someone pulls the t
ail
down to the ground, it should just about stay there. -The angle of the m
ain gear can be adjusted, often by just reversing those rubber blocks, or i
f necessary by grinding a slight taper on them with a course sanding disc i
n an angle grinder. -But of course, first must get the CofG of the aircra
ft 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 tub
e bent.
-
http://forums.matronics.com/viewtopic.php?t=56639&highlight=weak+701+no
se+gear
-
Curt
-
ist" target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
tp://forums.matronics.com
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Message 7
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| Subject: | Re: Bungee discussion |
Nothig as simple and proven as the bungee cord...--
-
Saludos
Gary Gower.
"Only add simplicity and lightness to an airplane"...
--- On Mon, 1/11/10, dennkrumm@aol.com <dennkrumm@aol.com> wrote:
From: dennkrumm@aol.com <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 rubb
ing together.- He pointed out how ultra-lights have been avoiding the rub
bing of controls cables since their inception by threading the cables throu
gh 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 ca
ble 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 cr
osses 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 fr
om moving up and down the cable.- 2) Build a support bracket at the "X" a
nd attach the center of the "X" on the bracket.- And 3) (if your cables a
re not continuously in contact with each other)-- Secure the tubing ont
o the cable to keep it from moving, but use a long enough piece of tubing t
hat 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 m
y 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 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 we
ar?
Sam
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Message 8
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| Subject: | Re: Fork tube analysis and prospective stainless steel |
substitute
Yep, land it like a taildragger and use the nosewheel only for
taxiing. The nosewheel is plenty strong.
----- Original Message -----
From: Gary Gower
To: zenith701801-list@matronics.com
Sent: Tuesday, January 12, 2010 12:31 PM
Subject: Re: Zenith701801-List: Fork tube analysis and prospective
stainless steel substitute
Nothing can replace learning and practice...
What you need to do is to spend a some time (depends on each
one) knowing your airplane (and learning to fly a STOL airplane)...
When landing hold the nosewheel up and balance on the main
wheel until you cant hold it anymore, then gently with a little elevator
and a little power, slowly put the Nose Wheel on the floor... With a
few minutes and using a little of power you can hold the NWl up and
travel a lot only on the mains and (with practice) let the NW down
gently...
Easyer to do than in a Motorcycle :-)
Sometime ago (I think when we had about 100 hrs on the 701) we
temporary installed a little wheel where the rear tie down and practice
to hold the plane in 3 point (like a tail wheel) then very gently, put
the main on the floor, even we were able to start rollling and take off
from that position (3 point:-)... Was real fun and we really came up to
know or airplane a lot... As everything, a little at a time, to not
harm the plane or yourself, practice is the secret.
Fun flying... with care is... FUN!
This practice will help a lot when landing in rough strips, this
prevents the nose gear from bouncing up and down (been there, done
that), since this type of landing the first time, we decided to learn
to balance in the main...
Saludos
Gary Gower
701 912S 285 hrs and counting.
"Sport flying is not just going from point "A" to point "B", is
getting to know and enjoy your airplane"
--- On Mon, 1/11/10, JG <vgstol@bigpond.net.au> wrote:
From: JG <vgstol@bigpond.net.au>
Subject: Re: Zenith701801-List: Fork tube analysis and
prospective stainless steel substitute
To: zenith701801-list@matronics.com
Date: Monday, January 11, 2010, 6:52 PM
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
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Message 9
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| Subject: | Re: Fork tube analysis and prospective stainless steel |
substitute
*Yep, land it like a taildragger and use the nosewheel only for
taxiing. The nosewheel is plenty strong.*
**Well said!
JG
On Wed, Jan 13, 2010 at 9:54 AM, BokKat <bobkat@btinet.net> wrote:
> Yep, land it like a taildragger and use the nosewheel only for
> taxiing. The nosewheel is plenty strong.
>
> *
> *
>
>
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