>
>
> I wonder about the integrity of the elevator mass balance in the accident
>aircraft. If the
>mass balance had become disengaged for any reason, then the slightest
>disturbance in pitch
>could cause the elevator to become uncontrollable. This would be
>consistent with the report
>of wild pitch excursions initially prior to the tail departing.
I am not so sure about the above. A failing mass balance would have the same
effect as pushing the stick forward. The pilot would instinctively pull back
the stick and regain level flight. Maximum trim would then reduce that load
a little, but there should be no real problem in maintaining ccordinated
flight with the stick held back.
Karl
>
> Glenn> From:
>willie.harrison@tinyonline.co.uk> Subject: Re: Europa-List: Europa
>Tailplane - Mod 73> Date: Sat, 14 Jul 2007 16:01:35 +0100> To:
>Harrison <willie.harrison@tinyonline.co.uk>> > I have heard that there are
>still doubts in the AAIB investigation > about whether the initial failure
>was the wing pin (with > consequential failure of the tail) or the other
>way around. Hence we > are being required to cover both hypotheses by mods
>and checks front > and back.> > If it was indeed the wing pin which failed
>first - very big "if" - > then the implication is that the tail could/would
>have then failed > because it was subject to loads it had never been
>designed for > (perhaps a sudden pitch or roll or yaw?) , and not because
>there was > anything wrong with it - it would have been a consequential
>event, > not a causal one. You might also feel that if the wing pin had
>failed > then the aircraft may have been doomed whether or not the tail
>broke > up. If this is true then perhaps neither mod 73 nor Nigel's mod >
>would have saved the day.> > A supporting thought to this hypothesis is
>that the build quality > around the wing pin on the crash aircraft is known
>to have been poor. > Also, the aircraft is known to have been returning
>from a Permit > inspection when the wings would have been removed and
>replaced. > Perhaps in refitting the wing, some damage was done to the
>already > compromised wing pin?> > Just a thought.> > Willie Harrison> > >
> > On 14 Jul 2007, at 15:05, Carl Pattinson wrote:> > > --> Europa-List
>message posted by: "Carl Pattinson" > > <carl@flyers.freeserve.co.uk>> >> >
>Im not sure your mod would have prevented Williams accident.> >> > I
>believe his kit would have been purchased in 1994 and was > > finished in
>1995.> >> >> > ----- Original Message ----- From: "Nigel Graham" > >
><nigel_graham@btconnect.com>> > To: <europa-list@matronics.com>> > Sent:
>Saturday, July 14, 2007 1:59 PM> > Subject: RE: Europa-List: Europa
>Graham" > >> <nigel_graham@btconnect.com>> >>> >> Hartstikke bedankt heren,
>tot u dienst.> >>> >> What really saddens me is that I wrote to Europa
>Aviation in the > >> late '90s> >> highlighting the potential problem with
>the tailplane and > >> proposing that the> >> tailplane mod be adopted as
>the standard build procedure. It would > >> have cost> >> nothing - no
>extra parts, just a change to build instructions the > >> manual.> >> In my
>mail to them, I even predicted a sequence of events that > >> could lead
>to> >> a tailplane becoming detached and the resulting in-flight break-up >
> >> of the> >> aircraft.> >> No interest was shown whatsoever and I never
>heard back from them.> >> When I learned of the in-flight break-up of
>William's plane, I had a> >> sickening feeling that I knew what might have
>happened. The full > >> AAIB report> >> will confirm (or otherwise) if I
>was correct but the fact that the> >> authorities are looking closely at
>this component leads me to > >> believe I'm on> >> the money.> >>> >>
>m.v.g.> >>> >> Nigel> >>> >> -----Original Message-----> >> From:
>owner-europa-list-server@matronics.com> >>
>[mailto:owner-europa-list-server@matronics.com]On Behalf Of Jan de > >>
>Jong> >> Sent: 14 July 2007 12:46> >> To: europa-list@matronics.com> >>
>Subject: Re: Europa-List: Europa Tailplane - Mod 73> >>> >>> >> -->
>Europa-List message posted by: Jan de Jong > >> <jan.de.jong@xs4all.nl>>
> >>> >> I am glad to second that. Thank you very much indeed!> >> Regards,>
> >> Jan de Jong> >>> >> josok wrote:> >>> --> Europa-List message posted
>by: "josok" <josok-e@ukolo.fi>> >>>> >>> Hi Nigel,> >>> It's a seldom
>opportonity to be able to thank the right person > >>> for a great> >>
>idea! So: Thanks, ever so happy that i don't have to worry about > >>
>loose> >> bushes!> >>> :-)> >>>> >>> Regards,> >>>> >>> Jos Okhuijsen> >>>>
> >>>> >>>> >>>> >>>> >>>> >>> Visit - www.EuropaOwners.org> >>>> >>>> >>>>
> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>> >>> >>>=====> > >
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