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  #1  
Old 11-08-2017, 07:39 AM
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JackinMichigan JackinMichigan is offline
 
Join Date: Nov 2012
Location: Canton, MI
Posts: 161
Default Elevator control stick play

We have a small amount of play in both our control sticks in the fore/aft direction. It isn't much, maybe 1/4" at the grips, and it's consistent for both pilot and copilot. I was told by one experienced pilot that this play was going to screw with me over time and it needs to be tightened up.

I tracked the problem down to the fit between the brass bushing that goes between the base of the sticks and the bar that connects the sticks to the elevator pushrod. There is a slight amount of play between the OD of the bushing and the ID of the welded-on steel tube at the base of the stick. Without having a new custom-fitted and machined bushing made I cannot see an immediate solution to the problem.

Is this play just a feature of RV-10s? Should I tighten it up somehow?
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RV-10 N1861G
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  #2  
Old 11-08-2017, 07:46 AM
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Bill.Peyton Bill.Peyton is offline
 
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Location: St. Louis, MO
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Default

I ended up machining a new bushing as have many others. That's the only way to get rid of the play. And yes, it will drive you nuts until you do....... Find a friend with a lathe
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RV-10 - 700 Hrs
First Flight Oct 2012
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  #3  
Old 11-08-2017, 12:54 PM
alpinelakespilot2000 alpinelakespilot2000 is offline
 
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This is a well known, long-standing issue on the 2-seat RV's as well. I'm surprised that Van's hasn't tightened up their tolerance in this area over the years but the fact that they haven't suggests that they don't see that play as a major problem.
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Ellensburg WA
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  #4  
Old 11-08-2017, 01:27 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Default

It is not a major problem and it doesn't cause a flight qualities issue (I don't recall any test / flight review pilot ever mentioning it in their evaluation report, but maybe I have forgotten).

It is something that is inherent to all the RV models (except the RV-14), except on the RV-4 and 8 it adds some system play in the roll direction instead of the pitch direction.

Because it is understood that even though it generally isn't noticeable, it is less than idea from a design aspect, when the RV-14 was designed, bearings were incorporated into this location of the control system.

1/4" play at the top of the stick does sound excessive though and probably warrants redoing. A typical new installation is usually less than 1/8".
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  #5  
Old 11-08-2017, 01:32 PM
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Bill Boyd Bill Boyd is offline
 
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Location: Landing field "12VA"
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Default Just curious

if thin brass shim stock or a dab of JB Weld on the outside of the bushing/inside of the weldment would be a kosher solution to the slop?
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Hop-Along Aerodrome (12VA)
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  #6  
Old 11-08-2017, 03:18 PM
rvsxer rvsxer is offline
 
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Location: Inver Grove Hgts, MN
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Quote:
Originally Posted by Bill Boyd View Post
if thin brass shim stock or a dab of JB Weld on the outside of the bushing/inside of the weldment would be a kosher solution to the slop?
Hey Bill, I wonder how many listers know who your avatar is...I do, and I used to watch that show as a kid.
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RV-6 N207AM w/G3X, 1,400 hours +
South St. Paul, MN (KSGS)
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  #7  
Old 11-08-2017, 04:52 PM
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Bill Boyd Bill Boyd is offline
 
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I was going to reply earlier but there was an outage aboardships.


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Hop-Along Aerodrome (12VA)
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RV-10 - N130YD reserved - under construction

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  #8  
Old 11-08-2017, 05:00 PM
Ron B. Ron B. is offline
 
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Location: Yarmouth, Nova Scotia
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Quote:
Originally Posted by Bill Boyd View Post
if thin brass shim stock or a dab of JB Weld on the outside of the bushing/inside of the weldment would be a kosher solution to the slop?
I used the brass shim stock solution.
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  #9  
Old 11-08-2017, 06:13 PM
Wyzepilot Wyzepilot is offline
 
Join Date: Oct 2013
Location: Red Bank, NJ
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Iím wondering if maybe Vans fixed this issue because I just completed this step last week and the bushing fit quite snug in the base. In fact I had to convince it to go in that last little bit with a plastic tip hammer.

Dave
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  #10  
Old 11-08-2017, 08:33 PM
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9GT 9GT is offline
 
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Location: Southern Michigan
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I wrapped mine with that aluminum tape used for duct work until it fit good.
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Howell, MI

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