Ive finally managed to satisfy myself that the flaps are operating over the
correct
range, and moved on to installing the undercarriage. After fitting the LG02
swinging arm to the LG01 mounting frame, I was still (just) able to operate
the retract lever without any bungee assistance. Then I fitted the wheel and
brake to LG02 and of course that made it too heavy to retract without the
bungee.
Yesterday I fitted the bungee and was pleased to find a number of loops and
tension
that nicely balanced the weight of the undercarriage and allowed the lever
to operate quite easily. However, I couldnt quite get the lever into the up
gate. Examination of everything showed that (1) the tyre was hitting the brake
master cylinder and its elbow connexion and (2) the brake slave cylinder was
catching the rudder cable.
Initially it looked as if LG02 might be too far to starboard, but I had taken
care
when fixing LG01 into the fuselage to have LG02 temporarily fitted, and inserted
packing to keep LG02 equidistant from the tunnel at each side.
The other possibility that occurred to me was that (despite careful measurements
against the manual callout) Id pre-compressed the LG06 suspension block at bit
too much, causing the distance between the LG08 pivots and the LG02 pivots
to be too small, thus making the LG02 swinging arm retract too far.
I tried backing off the M8 stiffnuts a little (which involved removing and
re-installing
the bungee again - nobody mentioned how hard it is to thread the bungee
around LG02B anchor tube) and that did seem to allow a little but more movement
in the up direction but nowhere near enough to get the lever into the up
gate. While looking at everything after that adjustment, it seems that the
linkage
is not quite going over-centre in the down position - it appears the 3 pivots
are just about in line with each other. I wonder if lengthening the suspension
assembly has caused that.
Can anyone suggest what I might be doing wrong, please, or any way to solve the
problem?
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
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