At idle or while taxiing, the balance weight can at times vibrate
against the rubbing strips, introducing some additional periodic noise.
This is possible even with the cables and close fitted tolerance with
the rubbing strips.
Goes without saying that the strips have to be fitted perpendicular to
the TP torque tube (although this probably twists out of true during a
taxiing turn).
In flight I've not noticed any vibration above all the other odd
vibrations and rattles and there doesn't appear to be any loss of trim
sensitivity from any increased friction.
Duncan McF.
----- Original Message -----
From: Greg Fuchs
To: europa-list@matronics.com
Sent: Wednesday, July 14, 2010 5:41 PM
Subject: Europa-List: Mod 70 fliers with tufnol strips in place of
cables
For those out there that implemented mod 70 (tailplane mass-balance
arm replacement) and hacked out the cables, how is it going? While
flying through steep banks or turbulence, can you feel (through the
stick) the mass-balance weights thumping up against the guide strips?
Maybe it can be felt as a slight resistance to fore/aft stick movement?
Due to the very small clearance between the weights and the strips, and
the tendency for the arm to wiggle laterally, this is sure to be
happening.
I built the 'H' support with precision, as if going to use of the
guide strips, but am expecting to switch over to the cables if the
tufnol method did not perfectly satisfy me in the end. Part of the
satisfaction is in how it works in flight. I cannot find anyone weighing
in on this yet..
The turnbuckles and nicopress clamps have been sitting in a box
gathering dust, and they would like to know when they are to do their
part.
Greg Fuchs A050
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