Today's Message Index:
----------------------
1. 12:03 PM - Aileron bellcrank maintence or failure issues? (John Marzulli)
2. 06:16 PM - Re: Aileron bellcrank maintence or failure issues? (rockiedog2)
3. 06:21 PM - Re: Aileron bellcrank maintence or failure issues? (rockiedog2)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Aileron bellcrank maintence or failure issues? |
My EAA tech counselor really does not like the Zenith technique to hold the
aileron bellcranks.
I was wondering if anyone has experienced a failure, hole elongation,
eventual slop, ect using the cotter pin method.
Has anyone added huge washers to help hold the system? Any alternative ways
to hold them in place?
Even with the grease it seems like the crank holes will wear. Has anyone
inserted a bearing surface between the crank and the flaperon mixer?
Thanks,
John Marzulli
http://MarzulliPhoto.net/
http://701Builder.blogspot.com/
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Aileron bellcrank maintence or failure issues? |
Hi John
I removed my bellcrank at 200 hours to modify it to the stationary plate above
the torque tube. It had quite a bit of elongation in the pivot hole already. A
bearing there would be much better. I intend to just ream it oversize and press
a bronze bushing in another couple hundred hours. The wear is mostly from all
the sideloading it takes from the cables tightening with right aileron application.
The small cotterkey keeper is in keeping with the rest of the control
system design...rather juryrigged, in my opinion. A bolt welded in there instead
with a castle nut, washer and cotter key would be better and just as simple.
I like the stationary mount. Solved a lot of problems.
Joe
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=335457#335457
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Aileron bellcrank maintence or failure issues? |
John
Sorry. I was talking about the wrong bellcrank...but yes, my aileron bellcranks
already have some slop in them too...but of course no sideloading like the elevator
one. I have large washers behind the keys on mine. All 3 of the bellcrank
mounts can be improved , for sure
Sorry again for not paying attention. The ADD is getting pretty bad
Joe
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=335458#335458
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|