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dave.saylor.aircrafters(a
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 Posted: Fri Jan 27, 2012 9:58 pm Post subject: Loose aileron hinge bearings |
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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
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| Posted: Sat Jan 28, 2012 5:53 am Post subject: Loose aileron hinge bearings |
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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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Sent from my mobile device
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Sat Jan 28, 2012 6:49 am Post subject: Loose aileron hinge bearings |
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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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arget="_blank">http://www.matronics.com/Navigator?RV10-List
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http://forums.matronics.com
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le, List Admin.
="_blank">http://www.matronics.com/contribution
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Kelly McMullen
A&P/IA, EAA Tech Counselor
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dave.saylor.aircrafters(a
Guest
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| Posted: Sat Jan 28, 2012 7:10 am Post subject: Loose aileron hinge bearings |
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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
> ===========
>
|
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dave.saylor.aircrafters(a
Guest
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| Posted: Sat Jan 28, 2012 7:10 am Post subject: Loose aileron hinge bearings |
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|
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  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
|
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http://www.matronics.com/Navigator?RV10-List |
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