 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
Cwehner
Joined: 15 Jan 2009
Posts: 17
Location: Tulsa, OK
|
 Posted: Wed Oct 28, 2009 9:27 pm Post subject: Rod end to elevator horn question. |
 |
|
We're doing the final rigging and fastening of the elevator, push-rod, etc on a Kitfox IV. The manual and drawings show the rod-end and elevator control horn being fastened with a Clevis bolt and shear nut. I would like to confirm a few things:
1. there is NO washer used on this bolt and nut.
2. there is only about a single thread showing through the shear nut.
With the covering and elevator "stop bar", there is no way to get my torque wrench on the shear nut for "proper" torquing so can someone give me their advise on how tight this nut should be. I've got a pretty good feel for 20-25 in/lbs. is that sufficient?
and lastly what is the best way to get a flat head screw driver on the clevis bolt? doesn't seem to be a good way to get to it with the covering and "stop bar" in the way.
Thanks for any help.
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
|
_________________
Chris Wehner
Tulsa, Oklahoma
Kitfox IV, 912, Final push for completion! |
|
| Back to top |
|
 |
Lynn Matteson
Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan
|
| Posted: Thu Oct 29, 2009 5:10 am Post subject: Rod end to elevator horn question. |
|
|
Here I go again, laying my shade-tree engineering methods out there
for all the (Kitfox) world to see:
I looked at the specs for a clevis bolt (in the Spruce catalog....not
exactly the Bible of information, but it was all I had at the time)
and they show a minimum tensile strength of 125,000 PSI. I then
compared it to an AN bolt of the same size....125,000PSI. Figuring
that if the two were equal in strength, I substituted an AN
bolt...with a hex head....and now getting a screwdriver in there was
not an issue.
However, you could *maybe* use a right-angle screwdriver to get in
there, I'm just not recalling how much room there is to play with.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 803.7 hrs
Countdown to 1000 hrs--197 to go
Sensenich 62"x46" Wood prop
Electroair direct-fire ignition system
Rotec TBI-40 injection
Status: flying (and learning)
do not archive
On Oct 29, 2009, at 1:27 AM, Cwehner wrote:
| Quote: |
We're doing the final rigging and fastening of the elevator, push-
rod, etc on a Kitfox IV. The manual and drawings show the rod-end
and elevator control horn being fastened with a Clevis bolt and
shear nut. I would like to confirm a few things:
1. there is NO washer used on this bolt and nut.
2. there is only about a single thread showing through the shear nut.
With the covering and elevator "stop bar", there is no way to get
my torque wrench on the shear nut for "proper" torquing so can
someone give me their advise on how tight this nut should be. I've
got a pretty good feel for 20-25 in/lbs. is that sufficient?
and lastly what is the best way to get a flat head screw driver on
the clevis bolt? doesn't seem to be a good way to get to it with
the covering and "stop bar" in the way.
Thanks for any help.
--------
Chris Wehner
Tulsa, Oklahoma
Kitfox IV, 912, Final push for completion!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 69948#269948
|
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
|
_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM |
|
| Back to top |
|
|
Tom Jones
Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
|
| Posted: Thu Oct 29, 2009 6:19 am Post subject: Re: Rod end to elevator horn question. |
|
|
Chris,
The parts list in my 1994 classic 4 assembly manual Lists for "Rod end to elevator horn":
1-AN23-15A Bolt , Skystar#91026.000
1-AN364-1032 Nut #91064.000
1-AN960-10 Washer #9147.000
Figure F-C-3 also shows the washer.
The torque specified for a 1032 shear nut is 12-15 inch pounds. I used an offset screwdriver and a box end wrench and just snugged it up. 12 inch pounds is only 1 foot pound you know.
There should be at least 1 thread showing past the nut. If yours does not with the AN960-10 I would try a AN 960-10L (thin washer). Be sure you are using the thin shear nut an not a AN 365 (thick nut)
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
|
_________________
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA |
|
| Back to top |
|
|
Cwehner
Joined: 15 Jan 2009
Posts: 17
Location: Tulsa, OK
|
| Posted: Thu Oct 29, 2009 8:01 am Post subject: Re: Rod end to elevator horn question. |
|
|
Thanks Lynn and Tom.
Thats interesting Tom because my '91 model IV manual doesn't show the washer in the Drawing F-C-3 nor does it mention using one in the worded instructions. Using the AN23-15A bolt with no washer I only have 1 thread showing past the shear nut, even a thin washer wouldn't work. I may try using 1 size longer bolt so I can use a washer and have a few threads sticking out. I Would feel much better about that. I am guessing the only concern is how much and hard it rubs against the fabric when full aft.
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
|
_________________
Chris Wehner
Tulsa, Oklahoma
Kitfox IV, 912, Final push for completion! |
|
| Back to top |
|
|
Tom Jones
Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
|
| Posted: Thu Oct 29, 2009 11:11 am Post subject: Re: Rod end to elevator horn question. |
|
|
| Quote: | Thanks Lynn and Tom.
Thats interesting Tom because my '91 model IV manual doesn't show the washer in the Drawing F-C-3 nor does it mention using one in the worded instructions. Using the AN23-15A bolt with no washer I only have 1 thread showing past the shear nut, even a thin washer wouldn't work. I may try using 1 size longer bolt so I can use a washer and have a few threads sticking out. I Would feel much better about that. I am guessing the only concern is how much and hard it rubs against the fabric when full aft. |
Chris, I was at the airport this AM so checked that. Mine has 3 threads showing past a thick washer. I wonder if you have the correct length clevis bolt. You didn't mix it up with one of the AN23-14A that go in the elevator idler bell crank by chance? You definitely should get one that has at least one thread showing past the washer.
I have a 94 manual and an updated May 96 version too. Both show the washer in the drawing and the 94 lists it in the parts list. Neither mention the washer in the final assembly section though.
The head of the clevis bolt goes on the right side. Mine just touches the fabric at full up elevator. There is plenty room for the bolt end to stick out on the left side without any interference.
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
|
_________________
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA |
|
| Back to top |
|
|
Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
|
| Posted: Thu Oct 29, 2009 11:37 am Post subject: Rod end to elevator horn question. |
|
|
At 10:27 PM 10/28/2009, you wrote:
| Quote: | 1. there is NO washer used on this bolt and nut.
2. there is only about a single thread showing through the shear nut.
|
Sounds good to me, except I used a MS21042 nut since it locks. All
you're trying to do is come up with a set-up that doesn't touch the
fabric when full up elevator.
| Quote: | With the covering and elevator "stop bar", there is no way to get my
torque wrench on the shear nut for "proper" torquing so can someone
give me their advise on how tight this nut should be. I've got a
pretty good feel for 20-25 in/lbs. is that sufficient?
|
Yep.
| Quote: | and lastly what is the best way to get a flat head screw driver on
the clevis bolt? doesn't seem to be a good way to get to it with the
covering and "stop bar" in the way.
|
I used a small screwdriver sideways to hold the flat head. (Use the
edge of the blade rather than the tip.) I tightened the nut with a box wrench.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 400 hrs. and counting
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
|
_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
