Steve
There are two reasons for the apparent different angle of attack. Firstly the
lower
canoe has some inherent twist in it. Secondly the port and starboard fuselage
mouldings are not symetrical. As a result the tail planes look as though
you,ve made a complete b***s up of them. It certainly seems to be quite a common
finding - indeed there was quite a bit of correspondance about it a while
back.
Regards Paul Stewart #432
----- Original Mes sage -----
From: Steve Hagar
Subject: Tailplane to root fairing alignment, -and servo pins
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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