Perfect answer Nev.
Best regards
Trev
Sent from my iPhone
On 12 Oct 2012, at 21:48, Neville Eyre <neveyre@aol.com> wrote:
> Hi Alan,
> It's a pity you were not available when we were working on the design and m
anufacturing process all those years ago, we could have done with an expert t
o help. Sorting out all of the thousands of items with your help would have b
een welcome.
> Everything could have been made bullet proof, trouble is the Europa would h
ave weighed perhaps 1200 + pounds, with little payload ?
> A number of options are available to you.
> 1]. Submit your new [improved] design to L.A.A. you might get it through i
n a year or two ?
> 2]. Call Karen at Europa, have your Credit Card ready, and order one of th
e new [ improved] torque tube assemblies. With hindsight, and less pressure 1
8 years on, Europa have done a re design on this. Back then, we didn't take i
nto account that builders would take it apart / reasemble / take apart / rea
semble it the wrong way round / take apart / reassemble and wear the holes .
......... or they would smack the mass balance weights onto the stop..... If
you take this option, you might have to ream out the bores of the TP5 /TP6 s
leeves in your tailplanes to allow the torque tube to slide on easily, as t
hey were matched to each individual torque tube. Easy but time consuming, wi
th a broom handle and emery cloth.
> Almost certainly you will need to sweat out the TP13 bushes [ the four 1/4
'' bore drive bushes in the inboard rib] and re pot them to match the drive p
ins, simple job with a heat gun and 1/4'' bolt, and some epoxy. This heavy d
uty item is, funnily enough, heavier.
> 3]. Remove the entire torque tube assembly, mark everything as to their or
ientation [ horn , drive plates and nylon spacers relative to the torque tub
e] and establish the scale of the wear [in the holes, not the pins]. If the p
ins are the original 1/4'', and the holes are not too worn [ they might be n
ow if you have been swinging on the tail to check wear] the next size up was
5/16''. Not sure if these are available from Europa, as they go directly to
10mm now, bigger is better, but doesn't give you another shot at it if you m
ess up on reassembly. The new holes in the tube / fiting need to be an inte
rference fit, as in if you can push the pin in by hand, the jobs buggered be
fore you fit them. I have just done this job last week to a monowheel with 8
00+ hours on it. very slight play but as it was in my workshop it made sense
to sort it for another 800 hours life.
> Get a machine shop to ream the holes out to 0.007'' smaller than the pins A
CTUALLY MEASURE, and make sure you don't lose the relative positions of the
fittings when this is being done. If there is significant play between the d
rive plates, ensure they are clocked to be in allignment with each other dur
ing the drilling process. DON'T trial fit the pins ! It is a once ony job ! O
n reinstallation, to drive the pins in you will need a 4lb copper hammer.Wit
h the nip of the tube on the pin, it will need a firm wallop to drive the pi
ns in, should be a '' doink, doink, doink, donk '' Mark with a felt pen on t
he head of the pins the axis of the split pin hole so you can have them vert
ical when you insert them, it helps to taper the lead end of the pin back to
the split pin hole to assist insertion, and lube the pin with thin oil.
> Depending on whether the original builder put the inspection / view panels
in the place described in the Build Manual, or chose to delete / move them,
this is either a 3 hour each way job + the machining work, or a couple of d
ays marathon swearing session.
> This work will need inspecting, and entering in the aircrafts Log Book.
> Regards,
> Nev.
>
>
>
> -----Original Message-----
> From: Alan Carter <alancarteresq@onetel.net>
> To: europa-list <europa-list@matronics.com>
> Sent: Wed, 10 Oct 2012 23:54
> Subject: Europa-List: Re: Mod 73
>
>
>
> Hi Brian.
> To me it feels like play, i will check again, and slide the Stablators off
and
> check inserts making sure they are bonded.
> I am just a pilot but i could have done a better job in designing this lin
kage.
> As this has the possibility of grounding the aircraft for some considerabl
e
> time, due to the fact that clamps are individually made to size, Why ha
s,t
> something not been done about it.??
> Why can,t you get a complete unit with clamps already made, so the job cou
ld be
> done in one go, say a day, not grounded for 2 months.
>
> Alan
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=385078#385078
>
>
>
>
>
>
>
> arget=_blank>http://www.matronics.com/Navigator?Europa-List
> p://forums.matronics.com
> blank>http://www.matronics.com/contribution
>
>
>
>
>
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