Steve,
I have had the delightful task of ripping out my trim tabpins twice. First
to correct a misalignmet like you have, then to replace them with the
updated unit.
To remove just grind away the covering layers of bid then heat the plates (I
use a heat gun). When the glass sofens you can pull off the plate with a
pair of pliers.
The tabs are very easy to align when on the plane. Get everything set up
and cover the plate with flox. I used bits of balsa wood jamed inbetween
the fuselage and plate to hold it tight until the flox dries, then remove
the stab and do the bid thing.
I also niticed a bit of difference between the fuselage and root fairings,
but always went with the digital level and my plane flys hands off so I must
have done something right.
Bob Jacobsen
A131
From: "Steve Hagar" <hagargs@earthlink.net>
>Subject: Tailplane to root fairing alignment, -and servo pins
>Date: Sat, 10 Nov 2001 8:40:13 -0800
>
>
>I have started jumping around on doing mechanical assembly of the fuselage
>components/systems. It seems whenever I get into something one little item
>keep me from completion so rather than wait for a part or information I go
>to
>another part. This week I find myself at the tail end.
>
>
>Upon installing the tailplanes it appears that the angle of attack of one
>is greater than the other. This appearance stemming from the alignment of
>each tailplane root with the fairing moulding of the fuselage. The port
>side
>angle of attack looks greater when compared with the moulding on the
>fuselage. This is especially disconcerting since I had spent days many
>months (years?) ago lining the left and right sides up when constructing
>the
>tailplane assemblies.
>
>
>However upon jigging up my digital level and measuring the aoa
>of each tailplane to the best of my ability, I find that I am within 0.1
>degree between left and right. My assumption is that the molding is off
>slightly
>and I may have a small shape variance between the leading edge profiles
>near the
>molding giving the appearance of highly differing angles of attack.
>
>
>Has any one else seen this on their fuselage moulding? It is
>disconcerting but I am not planning on changing anything as the level
>doesn't
>read to better than 0.1 so I am within the capability of my tools. Any
>thoughts out there on this?
>
>
>A second item:
>
>
>I find that my left and right servo tabs are not lining up (no
>not in the same direction as the apparent difference of the tailplanes
>noted
>above!). Though however this is a good thing as the drive pins need to
>come out to implement the installation of the beefier units that I almost
>had to beg Europa to send me. Do any of you who have performed the
>retrofit have any tips or shortcuts for the swap out to to enhance
>alignment. I plan on trying to use the T bar to reset these. Any
>tips on ripping the old units out to preserve the planar alignment of the
>pin
>plate?
>
>
>Steve Hagar
>
>A143
>
>Mesa, AZ
>
>(finally some good building weather, I can now leave the garage
>door open)
>
>
>--- Steve Hagar
>
>--- hagargs@earthlink.net
>
>
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