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
> >
> >
> >
>
>
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