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12-07-2013, 11:38 AM
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Join Date: Aug 2009
Location: Lexington, KY
Posts: 454
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Nose wheel pants mounts
The cutout in the U-1013C-L and R mounting brackets that fits over the axle washers has some play in them (up and down play). Is this OK? Furthermore, the plans calls for three washers under the bolt head and nut. They are AN 960-616 and AN-960-616L, and outside to these washers is a larger diameter washer 062-25783054. The combined height of the 616 washers is greater than the thickness of the mounting bracket, with the result that there is up and down play from the mismatch of cutout and 616 washer diameters AS WELL as the bracket not held down by the larger washer. Does not seem right to me.
As a side, I have the MATCO nose wheel installed.
What did you guys do gain access to the nose wheel valve?
Thanks.
Johan
__________________
Dorfie
RV10 Flying, N245JM
2020 dues paid with a smile
Last edited by Dorfie : 12-09-2013 at 12:18 PM.
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12-09-2013, 11:17 AM
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Join Date: Nov 2006
Location: Colorado Springs
Posts: 27
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Nose wheel pants mounts
What Plans revision / page are you looking at? Is the part in question number U-1013C-L/R.
Cheers,
Jay
N433RV RV10 - Flying
Quote:
Originally Posted by Dorfie
The cutout in the U-10123C-L and R mounting brackets that fits over the axle washers has some play in them (up and down play). Is this OK? Furthermore, the plans calls for three washers under the bolt head and nut. They are AN 960-616 and AN-960-616L, and outside to these washers is a larger diameter washer 062-25783054. The combined height of the 616 washers is greater than the thickness of the mounting bracket, with the result that there is up and down play from the mismatch of cutout and 616 washer diameters AS WELL as the bracket not held down by the larger washer. Does not seem right to me.
As a side, I have the MATCO nose wheel installed.
What did you guys do gain access to the nose wheel valve?
Thanks.
Johan
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12-09-2013, 11:48 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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As I recall, I used a thin and a standard washer to get a stackup that was just a few thousandths less than the bracket, then a large dia washer to capture things when the axle bolt is tightened up.
Works well.
For air, I remove the wheel pant----------pretty easy to do.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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12-09-2013, 12:06 PM
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Join Date: Aug 2009
Location: Lexington, KY
Posts: 454
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Quote:
Originally Posted by jaybob
What Plans revision / page are you looking at? Is the part in question number U-1013C-L/R.
Cheers,
Jay
N433RV RV10 - Flying
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Jay,
My fault. The 2 should not be in the part#. Your part numbers are the correct ones. I have corrected it in my original post. Page 46-06 Fig 2 calls the axle and washer/nut arrangement. Pages 48-18 and 19 shows bracket installation.
Johan
__________________
Dorfie
RV10 Flying, N245JM
2020 dues paid with a smile
Last edited by Dorfie : 12-09-2013 at 12:18 PM.
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12-09-2013, 12:16 PM
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Join Date: Aug 2009
Location: Lexington, KY
Posts: 454
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Quote:
Originally Posted by Mike S
As I recall, I used a thin and a standard washer to get a stackup that was just a few thousandths less than the bracket, then a large dia washer to capture things when the axle bolt is tightened up.
Works well.
For air, I remove the wheel pant----------pretty easy to do.
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Mike,
The thickness of the bracket is 0.063. Thickness of -616 washer is 0.063, and -616L is 0.030. I am not sure why the plans call for the addition of the thinner washer, and was wondering if there is a reason for that. Maybe the mount is supposed to be "floating" a little, which seems unlikely to me. The larger washer seems to be there to clamp the bracket in place.
Can you recall if the "slot" in the mount that slides over the -616 washers was a tight fit around the washers? I have quite a few thousands play in mine.
Thanks.
Johan
__________________
Dorfie
RV10 Flying, N245JM
2020 dues paid with a smile
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12-09-2013, 12:28 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Quote:
Originally Posted by Dorfie
Maybe the mount is supposed to be "floating" a little, which seems unlikely to me.
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Mine "floats" while sliding it on, but then is solid when the axle bolt, and the tow bar hookup bolts are tightened.
Quote:
Originally Posted by Dorfie
The larger washer seems to be there to clamp the bracket in place.
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That is how I have it setup.
Quote:
Originally Posted by Dorfie
Can you recall if the "slot" in the mount that slides over the -616 washers was a tight fit around the washers?
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Loose enough to make sliding the bracket/pant assembly on simple.
You do have the brackets and rear half of the pant assembled into a unit for installation, dont you?
Once you have the brackets installed in the rear half of the pant, there is no reason to take them out again unless something gets bent or broken.
Quote:
Originally Posted by Dorfie
I have quite a few thousands play in mine.
Thanks.
Johan
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Yep, same here.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
Last edited by Mike S : 12-09-2013 at 12:36 PM.
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12-09-2013, 12:56 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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The design philosophy of this style of nose fairing and brackets (also used on the 7,8,and 9) is the washer stack-up to be such that there is just enough thickness clearance for the brackets to slid on and then be held in position by the fwd. bolts (tow bar attach points).
This allow the fairing to only need holes at the tow bar attach bolts. None are needed to access the axle bolt (because it is fully tightened before installing the fairing).
It has proven to hold up well in service.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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12-09-2013, 01:41 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Scott, I am not about to dispute your input on the design of the brackets, but I chose to do mine a bit different, and use the axle to clamp the assembly for a more secure setup------again, that is how I did it. I am willing to have the extra holes in my wheel pant. Of course, I could have used a couple end wrenches and not put in holes, but I tend to a bit of laziness at times
I felt that there was too much moment arm working against the tow bar mounts, and that the nose of the bracket would take excess punishment.
There have been failures.
http://www.vansairforce.com/communit...broken+bracket
http://www.vansairforce.com/communit...broken+bracket
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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12-09-2013, 02:38 PM
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Join Date: Feb 2007
Location: Mpumalanga, South Africa
Posts: 1,065
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I've set mine up exactly as per the plans. The bracket is a very tight fit sliding in behind the washers but does just go into place. Then the 2 set screws hold it in place. It means I could glass over the screws in the rear half and all that is required is to fit the front half to the rear. What is the issue?
__________________
Paul
Mercy Air, White River FAWV
RV-10 ZU-IIZ - "Zeus"
Building Bearhawk Bravo - RV-18 not available
2019 Donation Made
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12-09-2013, 02:41 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Quote:
Originally Posted by paul330
What is the issue?
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Some folks have had problems.
http://www.vansairforce.com/communit...broken+bracket
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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