Today's Message Index:
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1. 02:25 PM - Re: Elevator Pushrod Rod End (davehead)
2. 03:59 PM - Re: Elevator Pushrod Rod End (Bob Turner)
Message 1
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| Subject: | Re: Elevator Pushrod Rod End |
My elevator rod end (forward end) did not unscrew, but I did find the safety wire
broke after about 2 years of flying. The jam nut was still tight so the bearing
did not unscrew from the pushrod. I concluded that I had installed the safety
wire too tight .. Im not saying it was twisted too many turns per inch, but
I suspect that I had stretched it too tight from where it attaches to the end
of the pushrod, to the AN4 bolt that captures it at the rod-end bearing. The
wire might have become pinched or chafed between the bearing and the Control
Column clevis. Or movement of the pushrod and Control Column might impose some
extra stretch at certain extreme positions. So I reinstalled the safety wire
with a little slack, and its been OK for about 4 years now.
--Dave
RV10
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=482429#482429
Message 2
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| Subject: | Re: Elevator Pushrod Rod End |
davehead wrote:
> The wire might have become pinched or chafed between the bearing and the Control
Column clevis. Or movement of the pushrod and Control Column might impose
some extra stretch at certain extreme positions.
> RV10
Hi Dave!
I think that if you think about this very carefully, you'll see that if the safety
wire was installed properly (not pinched by the clevis and rod end) then it
does not stretch with control movement. But if it was pinned between the clevis
and rod end, then it is possible for it to stretch and also flex with control
movement.
Do you recall where your wire originally broke? And were you able to pull the wire
out of the clevis/rod end with minimal force, or was it pinched in there?
I'm wondering if, next time I'm in there, I should back off the jam nuts and re-install
with locktite?
Bob
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Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=482431#482431
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