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Re: Europa-List: Pitch Torque Tube

Subject: Re: Europa-List: Pitch Torque Tube
From: Duncan McFadyean <ami@mcfadyean.freeserve.co.uk>
Date: Thu, 3 Feb 2005 10:11:08

<<> Don't remove so much as to leave less metal at the side than there is
around
> the hole - i.e. leave as much metal at the side as there is at the top of
> the lug (hard to describe, but I guess you'll understand).>>

I understand what you mean, but to quote the original promoter of this idea
(Neville) this should be a "NO NO"!

The lug acts in bending, not tension. So, modifying in the manner proposed
might not reduce tensile strength but could reduce bending strength. A chain
is as strong as its weakest link and I suspect that these lugs come second
to being the weakest part of the
elevator system (first prize goes to the TP pins, although the usual mode of
failure these pins is not catastrophic).

There is a geometry of modification that would not compromise bending
strength, but I'll not describe that because this would make me complicit to
illegal modification to the control system!

Duncan McF.

----- Original Message -----
From: "M@nsfield" <nsfield@screaming.net>
Subject: Re: Europa-List: Pitch Torque Tube


>
> Hi David,
>
> A handy tip from Neville is to file a profile in the outer pairs of welded
> lugs (where the pitch push rods attach) so there is more rotational
movement
> before the lugs touch the edge of the CS05 aileron torque tube (where it
> sits flush with the CS08 crank).
>
> Don't remove so much as to leave less metal at the side than there is
around
> the hole - i.e. leave as much metal at the side as there is at the top of
> the lug (hard to describe, but I guess you'll understand).
>
> I'll see if I can get a picture of this, but my CM is installed so it
might
> be a bit cluttered in there...
>
> HTH
>
> PaulM
> XS 383
> CM in, TP in, off to the front for LG frame.
>
>
> I am about to mount the pitch torque tube to the cockpit module. I have
> the CS09 brackets clamped in position now. My question is about the amount
> of movement I should have. With it in the position I have it now, the
pitch
> push rods move about 2.25 inches, 55 mm, forward and back. Is this enough?
>  I have looked, but can't find mention of this in the manual.
>
> Thanks,
> Dave Simenauer
>
>
> Book yourself something to look forward to in 2005.
> Cheap flights - http://www.tiscali.co.uk/travel/flights/
> Bargain holidays - http://www.tiscali.co.uk/travel/holidays/
>
>




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