Today's Message Index:
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1. 12:46 AM - Tailplane freeplay (tarnish7)
2. 06:25 AM - Re: Tailplane freeplay (n7188u)
3. 02:54 PM - Re: Re: Tailplane freeplay (Bob Harrison)
4. 03:57 PM - Re: Tailplane freeplay (tarnish7)
Message 1
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| Subject: | Tailplane freeplay |
Question for you experienced and knowledgeable guys. I noticed vertical freeplay
in the tailplanes of my XS Mono, Standing at the tip of the left tailplane
facing the fin, I can lift the tip about 12 mm and when it stops moving there's
a small but definite "clonk". Mods 58 (trim tab drive pins) 62 (tailplane
torque tube pins and 70 (mass balance arm) have not been embodied.
I took the torque tube out - fun job, that - and the good news is that the bellcrank
(TP9) and tailplane drive plates (TP5) are a good tight fit with no play
and on TP 9 and tightly fitted pins. The plastic sleeves are a loose fit on
TP9 but there's negligible sideways free play on the assembly when installed,
so they're correctly positioned laterally. The vertical freeplay I noticed appears
to be coming from the fit between the TP5 drive plate and the TP11 bearing
bonded to the fuselage with the left side showing a bit more freedom than
the right side.
So, the exam question is, what's an acceptable level of vertical freeplay arising
from a less than perfect fit between TP5 and TP 11?
The aircraft's done about 300 hours total time since build in 2003. I didn't build
it, I bought it much later.
Any feedback would be valuable, thanks.
--------
Keith Hartley
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=491175#491175
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| Subject: | Re: Tailplane freeplay |
Look at this posting
http://forums.matronics.com/viewtopic.php?t=16770574&highlight=play
My tail plane is also a clunker and I have zero hours on my plane. I got good replies
on my post just like yours. If I recall correctly, as long as the play
is not on the pitch control (torque) axis it should be ok but what is unknown
to me is at what point it is too much. I was advised to move on as it is and keep
an eye on it which Im doing.
In my case, the bearings are ok but the bearing surface in the pitch tube on one
side is a few thou smaller causing noticeable play at the stab tip. I measured
everything and have the data but its been a while and at this point I really
dont even think about it although annoying it is.
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=491183#491183
Message 3
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| Subject: | Re: Tailplane freeplay |
Hi! When I bonded in my bushings I embodied grease nipples and in the event of
any slack appearing a shot of grease removes any such concerns.
Regards
Bob Harrison.
-----Original Message-----
From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of n7188u
Sent: 04 September 2019 14:24
Subject: Europa-List: Re: Tailplane freeplay
Look at this posting
http://forums.matronics.com/viewtopic.php?t=16770574&highlight=play
My tail plane is also a clunker and I have zero hours on my plane. I got good replies
on my post just like yours. If I recall correctly, as long as the play
is not on the pitch control (torque) axis it should be ok but what is unknown
to me is at what point it is too much. I was advised to move on as it is and keep
an eye on it which Im doing.
In my case, the bearings are ok but the bearing surface in the pitch tube on one
side is a few thou smaller causing noticeable play at the stab tip. I measured
everything and have the data but its been a while and at this point I really
dont even think about it although annoying it is.
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=491183#491183
---
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Message 4
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| Subject: | Re: Tailplane freeplay |
Thanks for the quick replies guys, much appreciated. I'm happy that the torque
tube integrity is fine (and while I have it out I'll embody the mods) and there's
no flutter of control resonance risk with that freeplay so I can understand
Chris' advice to leave it and keep an eye on it, but I'd still like to know
what constitutes "acceptable" - I still don't like something that "clonks" when
I wobble it!
Keith
--------
Keith Hartley
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=491197#491197
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