Please excuse the excessive trail below, but must leave house in a minute. I
have hung the canoe per the 4-bolt rolling cradle, having taken it from the
four-shape cradle (also illustrated earlier).
This leaves the after section 'dangling' somewhat and in fact is
quite tipsy aft if one is not careful. In the process I note a stiffness in
the pitch axis aft, but which disappears when I lift the tail. The inference
is that the weight of the tail section distorts the aft canoe sufficiently
to need a tailcone support to ensure the cockpit and top glue-ins are
properly placed. A tail bar 'just like the big 'uns!' (747)
Ferg
----- Original Message -----
From: Emmet E. Welch <ewelch@socal.rr.com>
<john@crixbinfield.freeserve.co.uk>; 'Forum' <europa@avnet.co.uk>
Subject: RE: Tailplane to root fairing alignment, -and servo
pins
> I also had this problem and left the slight twist in - for this reason:
> Talked to Jim Thursby about it and he had actually gone through taking
> the twist out on one plane, bonded the TT in, etc. When it came time to
> remove the fuse from the cradle, slight "re-twisting" tendancy was
> present - just enough to bind the TT and cause a good deal of friction.
> If anyone who has mounted theirs has tested this, just a very slight
> change in the tail resting state (twist or no twist) causes binding. I
> can imagine that even after the top is bonded on, if there was a decent
> amount of twist that had been corrected, releasing it may cause a
> problem.
>
> Mine was really not very bad. I chose to leave it - everything is still
> as required - measured carefully in all axes, against all reference
> points stated in this conversation.
>
> Emmet Welch
> A141 MonoXS, N141EW
>
> -----Original Message-----
> From: owner-europa@post.aviators.net
> Cc: Miles McCallum; John Cliff; Forum
> Subject: Re: Tailplane to root fairing alignment, -and
> servo pins
>
> Shaun,
> I had your problem in its entirety! The most important two thing is to;
> 1. Ensure the Torque Tube is horizontal with the front of the airframe!
> 2. Ensure the distance from the front of the airframe to the end of the
> torque
> tube on each side is equal!
> Then the aircraft will fly straight in both Lateral and Vertical planes.
> I opted to leave the inherent twist in the canoe as these measurements
> COULD BE
> altered once the jig holding the
> canoe in place is taken off or the aircraft may tend to revert back to
> its
> twisted "natural" state. Debatable I know, however
> the result of the twist, if left in, is small (in my case) and can be
> covered
> cosmetically to ones satisfaction.
> Cheers,
> Tim
>
>
> Shaun Simpkins wrote:
>
> > All right, this is getting confusing and putting my SHORTS in a twist.
> > If I go out and measure my raw fuselage bottom, the port stablilator
> > fairing is at most 1/8" forward of the starboard fairing.
> > The port torque tube crosshairs are 1/8" higher than the starboard
> > relative to the tops of their respective fairings, but are equally far
> aft
> > of the nose of the fairings.
> > I haven't checked the waterline, nor the vertical displacement of the
> > fairings from the waterline. Let's assume that they are the same for
> > now. If there is no twist and you drill on the crosshairs, your
> stabilators
> > willwind up with the port end skewed forward and up, and the port root
> > 1/8" higher than the fairing. If there's a twist, it could be
> horizontal,
> > but
> > still out of line with the fairing and still vertically misplaced.
> > Untwisting
> > a pure longitudinal twist could make things worse, since the
> crosshairs
> > are misplaced vertically.
> > So from what I see, the proper procedure would be to:
> > 1. untwist the tail cone ( and hope that the twist is purely about
> the
> > longitudinal axis ) if warranted.
> > 2. measure aft equal distances from the firewall for the torque
> tube
> > centers.
> > 3. measure up equal distances from the waterline for the torque
> tube
> > centers, but adjust to equalize any misalignment with the
> fairings.
> > There's another argument about whether twisting to align the tail is
> bad
> > from a structural point of view...
> >
> > Shaun
> > A207
> >
> > ----- Original Message -----
> > From: "Miles McCallum" <milesm@avnet.co.uk>
> > <europa@avnet.co.uk>
> > Subject: Re: Tailplane to root fairing alignment, -and
> servo
> > pins
> >
> > > Longitudinal position is fine - vertical position isn't - if you
> "untwist"
> > > the tail end in a jig...
> > >
> > > M
> > >
> > > > Forwarded from the bounce bin. Message is from
> > > > "Cliff Shaw" <dm25shannon@home.com>
> > > >
> > > > ****************************************************************
> > > >
> > > > All
> > > >
> > > > I just went out in the shop and made a mesurement on my taleplane
> torque
> > > > tube. It is 141.5" from the front surface of the fire wall to the
> front
> > > > surface of the torque tub at its outboard end. Both P & S sides
> are
> > > exactly
> > > > equal. My installation was done on the scribed X points. It
> turned
> > out
> > > > right on the MONEY and I am happy.
> > > > Cliff Shaw
> > > >
> > > >
> > > >
> > > >
> > > > The Europa List is supported by Aviators Network UK -
> info@avnet.co.uk
> > >
> > >
> > > The Europa List is supported by Aviators Network UK -
> info@avnet.co.uk
> > >
> >
>
> --
> Timothy P Ward
> 12 Waiwetu Street,
> Fendalton,
> Christchurch,
> NEW ZEALAND
>
> Ph. 0064 03 3515166
> email ward.t@xtra.co.nz
> Mobile 025 2649325
>
>
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