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Loose aileron hinge bearings

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dave.saylor.aircrafters(a
Guest

Posted: Fri Jan 27, 2012 9:58 pm Post subject: Loose aileron hinge bearings

I'm doing annual no. 5 and I see there's some looseness in 3 of the 4

aileron hinge bearings.  If I lift up or push/pull on the aileron I

can feel a little click and see a tiny bit of movement.  I can't say

I've seen this before, but I don't think I really looked for it.  I

have to look more carefully than I do on a preflight, but now that I'm

looking, it's obvious.  The plane has 988 hours.



I measured the play with a dial indicator and it's about .010"

radially between the inner ball and the outer race.  I'm almost

certain the outer race is tight in the hinge bracket since I can see

part of the outer race with the aileron removed.



I know on other homebuilts the ailerons can buzz when the hinges get

loose.  Not flutter, just a high frequency hum.  I don't notice

anything like that in flight.



Has anyone else seen this?  Can someone with newer bearings try the

same thing and let me know if you feel any looseness?



I called the factory and Gus' impression was that it's probably not an

issue.  Most of my experience with worn spherical bearings is on

helicopters, and these would just be approaching "boarderline".



What do you guys think?



Dave Saylor

AirCrafters

140 Aviation Way

Watsonville, CA 95076

831-722-9141 Shop

831-750-0284 Cell

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ScooterF15

Joined: 19 Jun 2006
Posts: 136

Posted: Sat Jan 28, 2012 5:53 am Post subject: Loose aileron hinge bearings

I just checked mine. Similiar to what you describe on 3 of 4 hinge

bearings. Just enough play to feel a slight click when pushed on. 200

hours on my -10, so I'm guessing  that's what it was like when new.



-Jim

N312JE

On 1/27/12, Dave Saylor <dave.saylor.aircrafters(at)gmail.com> wrote:

 	  Quote: 	
		   

 <dave.saylor.aircrafters(at)gmail.com>



 I'm doing annual no. 5 and I see there's some looseness in 3 of the 4

 aileron hinge bearings.  If I lift up or push/pull on the aileron I

 can feel a little click and see a tiny bit of movement.  I can't say

 I've seen this before, but I don't think I really looked for it.  I

 have to look more carefully than I do on a preflight, but now that I'm

 looking, it's obvious.  The plane has 988 hours.



 I measured the play with a dial indicator and it's about .010"

 radially between the inner ball and the outer race.  I'm almost

 certain the outer race is tight in the hinge bracket since I can see

 part of the outer race with the aileron removed.



 I know on other homebuilts the ailerons can buzz when the hinges get

 loose.  Not flutter, just a high frequency hum.  I don't notice

 anything like that in flight.



 Has anyone else seen this?  Can someone with newer bearings try the

 same thing and let me know if you feel any looseness?



 I called the factory and Gus' impression was that it's probably not an

 issue.  Most of my experience with worn spherical bearings is on

 helicopters, and these would just be approaching "boarderline".



 What do you guys think?



 Dave Saylor

 AirCrafters

 140 Aviation Way

 Watsonville, CA 95076

 831-722-9141 Shop

 831-750-0284 Cell




	


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Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Sat Jan 28, 2012 6:49 am Post subject: Loose aileron hinge bearings

Dave,

I agree with you. I would monitor them and see if it gets any worse. If they get any worse, I think it would be worth the peace of mind to replace them. Control surfaces are not an area you want to tolerate much play. Of course, if you get the chance to be somewhere that 410RV happens to be on the ramp, you could see how the "original" is faring in this department. Maybe you could even get that infamous Tech Counselor (initials of Cox)  that resides near the factory to do a surreptitious check of that aircraft or 220RV for you.

 

On Fri, Jan 27, 2012 at 10:54 PM, Dave Saylor <dave.saylor.aircrafters(at)gmail.com (dave.saylor.aircrafters(at)gmail.com)> wrote:

 	  Quote: 	
		    

 I know on other homebuilts the ailerons can buzz when the hinges get

 loose.  Not flutter, just a high frequency hum.  I don't notice

 anything like that in flight.

 

 Has anyone else seen this?  Can someone with newer bearings try the

 same thing and let me know if you feel any looseness?

 

 I called the factory and Gus' impression was that it's probably not an

 issue.  Most of my experience with worn spherical bearings is on

 helicopters, and these would just be approaching "boarderline".

 

 What do you guys think?

 

 Dave Saylor

 AirCrafters

 140 Aviation Way

 Watsonville, CA 95076

 [url=tel:831-722-9141]831-722-9141[/url] Shop

 [url=tel:831-750-0284]831-750-0284[/url] Cell

 

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 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

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  [quote][b]

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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

dave.saylor.aircrafters(a
Guest

Posted: Sat Jan 28, 2012 7:10 am Post subject: Loose aileron hinge bearings

Yeah, Gus and I talked a little bit about the easiest way to replace

them (none).  It wouldn't be that bad, but I'll avoid it a long as

possible.  If others note the same thing on newer ships then I'll fly

it and watch it.



I'm all ears for an Aurora report.



Dave Saylor

AirCrafters

140 Aviation Way

Watsonville, CA 95076

831-722-9141 Shop

831-750-0284 Cell



On Sat, Jan 28, 2012 at 6:47 AM, Kelly McMullen <apilot2(at)gmail.com> wrote:

 	  Quote: 	
		   Dave,

 I agree with you. I would monitor them and see if it gets any worse. If they

 get any worse, I think it would be worth the peace of mind to replace them.

 Control surfaces are not an area you want to tolerate much play. Of course,

 if you get the chance to be somewhere that 410RV happens to be on the ramp,

 you could see how the "original" is faring in this department. Maybe you

 could even get that infamous Tech Counselor (initials of Cox)Â  that resides

 near the factory to do a surreptitious check of that aircraft or 220RV for

 you.



 On Fri, Jan 27, 2012 at 10:54 PM, Dave Saylor

 <dave.saylor.aircrafters(at)gmail.com> wrote:

> I know on other homebuilts the ailerons can buzz when the hinges get

> loose. Â Not flutter, just a high frequency hum. Â I don't notice

> anything like that in flight.

>

> Has anyone else seen this? Â Can someone with newer bearings try the

> same thing and let me know if you feel any looseness?

>

> I called the factory and Gus' impression was that it's probably not an

> issue. Â Most of my experience with worn spherical bearings is on

> helicopters, and these would just be approaching "boarderline".

>

> What do you guys think?

>

> Dave Saylor

> AirCrafters

> 140 Aviation Way

> Watsonville, CA 95076

> 831-722-9141Â Shop

> 831-750-0284Â Cell

>

> ===========

> arget="_blank">http://www.matronics.com/Navigator?RV10-List

> ===========

> http://forums.matronics.com

> ===========

> le, List Admin.

> ="_blank">http://www.matronics.com/contribution

> ===========

>

- The Matronics RV10-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:

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dave.saylor.aircrafters(a
Guest

Posted: Sat Jan 28, 2012 7:10 am Post subject: Loose aileron hinge bearings

Thanks, Jim.  That's what I was hoping.  I don't think those bearings

live a very hard life so it wouldn't make a lot of sense for them to

be worn out already.



Dave Saylor

AirCrafters

140 Aviation Way

Watsonville, CA 95076

831-722-9141 Shop

831-750-0284 Cell



On Sat, Jan 28, 2012 at 5:50 AM, James McGrew <jsmcgrew(at)alum.mit.edu> wrote:

 	  Quote: 	
		   



 I just checked mine. Similiar to what you describe on 3 of 4 hinge

 bearings. Just enough play to feel a slight click when pushed on. 200

 hours on my -10, so I'm guessing Â that's what it was like when new.



 -Jim

 N312JE

 On 1/27/12, Dave Saylor <dave.saylor.aircrafters(at)gmail.com> wrote:

> 

> <dave.saylor.aircrafters(at)gmail.com>

>

> I'm doing annual no. 5 and I see there's some looseness in 3 of the 4

> aileron hinge bearings. Â If I lift up or push/pull on the aileron I

> can feel a little click and see a tiny bit of movement. Â I can't say

> I've seen this before, but I don't think I really looked for it. Â I

> have to look more carefully than I do on a preflight, but now that I'm

> looking, it's obvious. Â The plane has 988 hours.

>

> I measured the play with a dial indicator and it's about .010"

> radially between the inner ball and the outer race. Â I'm almost

> certain the outer race is tight in the hinge bracket since I can see

> part of the outer race with the aileron removed.

>

> I know on other homebuilts the ailerons can buzz when the hinges get

> loose. Â Not flutter, just a high frequency hum. Â I don't notice

> anything like that in flight.

>

> Has anyone else seen this? Â Can someone with newer bearings try the

> same thing and let me know if you feel any looseness?

>

> I called the factory and Gus' impression was that it's probably not an

> issue. Â Most of my experience with worn spherical bearings is on

> helicopters, and these would just be approaching "boarderline".

>

> What do you guys think?

>

> Dave Saylor

> AirCrafters

> 140 Aviation Way

> Watsonville, CA 95076

> 831-722-9141 Shop

> 831-750-0284 Cell

>



 --

 Sent from my mobile device

- The Matronics RV10-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:

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