Today's Message Index:
----------------------
1. 06:05 AM - W26C (William Daniell)
2. 09:43 AM - Re: W26C (JonSmith)
3. 10:15 AM - Re: W26C (Tim Ward)
4. 11:37 AM - Oil pooling (SPURPURA)
5. 12:21 PM - Re: W26C (JonSmith)
6. 09:30 PM - Wing Movement (Tim Ward)
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 |
|
Today in the pre flight i noticed something which has probably always been
present which is that the starboard side W26C moves front to rear a small
amount. I noticed this by grabbing the end of the wing and moving front to
rear.
W26C is the barrel of the wing rear pin socket assembly.
I have inspected tie bar and the mounting of the socket assembly and
everything is in order.
I am assuming that this is normal since the W26C barrel is free floating
fore and afte and is retained in place by the 3/16 hex socket machines
screws that fix the whole assembly to the fuselage. Am I right?
thanks
Will
William Daniell
LONGPORT
+57 310 295 0744
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 |
|
Will, comparing notes rather than any suggestions, mine has an identical movement
in the wingtip; a noticeable fore and aft movement of free play. Its in both
but a bit more on the starboard side.
I assume that its a touch of play in the pip pin where it fits into the wing pin
and the W26B/C mounting assembly. Mine has always been like it and Ive always
assumed it to be normal as I think that there must be a tiny bit of play in
a removable pin which will appear magnified out at the wingtip (the wing makes
a long spanner!). When I move the wingtip back and foreward I can see the
gap between the wing fairing and the fuselage side adjacent to the pip pin opening
and closing slightly in accordance with my movement which makes me think
that the play is in the pip pin itself.
I dont think that the play is caused by the W26B barrel moving back and forwards.
On mine the tolerance between the socket housing and the cheeks of the fittings
body are very tight, the barrel is held to the socket housing by locktite
and the pip pin holds the entire assembly together regardless of the loctite
when its rigged anyway.
Like you I am 100% confident of the integrity of all fittings in that area. I
think its just a bit of slack in the pip pin allowing the rear wing root to move
in and out from the fuselage side (slightly) rather than the wing root sliding
fore and aft. I would be very keen to hear from anyone else with more information
on it!
Cheers, Jon
--------
G-TERN
Classic Mono
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=478084#478084
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 |
|
William and Jon,
This movement seems unusual. I would de-rig the wings and check the integrit
y of your spars, spar wing sockets, and spar pins. There really should not b
e any movement at all!
Cheers,
Tim
Tim Ward
12 Waiwetu Street,
Fendalton,
Christchurch, 8052
New Zealand
ward.t@xtra.co.nz
Mob +64 210640221
> On 19/02/2018, at 3:05 AM, William Daniell <wdaniell.longport@gmail.com> w
rote:
>
> Today in the pre flight i noticed something which has probably always been
present which is that the starboard side W26C moves front to rear a small a
mount. I noticed this by grabbing the end of the wing and moving front to r
ear.
>
> W26C is the barrel of the wing rear pin socket assembly.
>
> I have inspected tie bar and the mounting of the socket assembly and every
thing is in order.
>
> I am assuming that this is normal since the W26C barrel is free floating f
ore and afte and is retained in place by the 3/16 hex socket machines screws
that fix the whole assembly to the fuselage. Am I right?
>
> thanks
>
> Will
>
> William Daniell
> LONGPORT
> +57 310 295 0744
Message 4
| 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 |
|
On the 914 oil is collecting at the base of #3 and #4 cylinders on the top.
Ive cleaned the are and found no cracks in the crankcase. Any similar experiences?
--------
N951EU - Tri-gear & 912ULS
I'D RATHER HAVE A BOTTLE IN FRONT OF ME THAN A FRONTAL LABOTAMY.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=478087#478087
Message 5
| 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 |
|
Hi Tim, thanks for your thought. I agree and might have over exaggerated the amount
of movement in my description - its only small and I can only think its
a touch of natural play in the pins; mainly the pip pins but possibly the main
wing pins too. I trailer and rig mine every time I fly so always see it derigged.
Everything is totally sound and correct. I remember in the build (well,
the weight increase mod) that the main pins were always quite a slack fit
in the bushes, especially the main pip pin which I seem to remember is a tad smaller
than the temporary bolts supplied for build purposes, so if nothing else
this must introduce a touch of movement in the system.
I also remember some years ago when thinking about this very subject, walking around
an LAA rally and having a surreptitious (and very gentle) pull on a few
other peoples wingtips and all the ones I tried had small bit of fore and aft
movment in the wing tips...!
Cheers!
--------
G-TERN
Classic Mono
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=478088#478088
Message 6
| 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 |
|
Hi Will and Jon,
I had the same problem and talked to Nev Eyre about it. The wing sockets are meant
to be bonded in place so that both sockets are firmly in contact with the
wing root when rigged, thus allowing no forward and aft movement of the wingtip
with moderate force (because the wings are pulled inwards against the sockets
by the main pins through the spars). But in practice, there is sometimes a very
small gap between the socket and the root, thus allowing a small fore and
aft movement at the wingtip. Nev suggested trying a stainless steel washer placed
over the forward socket to shim it out. When you find one the correct thickness,
it should prevent the movement at the tip. Too thick and the wings will
not rig. When you get the correct thickness, it can be bonded on to the wing
root with A420.
But Nev also said if it is only a very small movement at the tip it is not really
a problem.
Regards,
Keith Hickling,
New Zealand.
Tim Ward
12 Waiwetu Street,
Fendalton,
Christchurch, 8052
New Zealand
ward.t@xtra.co.nz
Mob +64 210640221
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! --
|