7
3.2 - Movable arms, adjustments and disassembly.
The gooseneck movable arms will enable you to have
both comfort and harness reactivity. Neither too high
nor too low.
The two movable arms have a slight torsion on the
left, in order to reduce the engine torque when the
propeller is rotating clockwise.
The movable arms are delivered with the manufacturer’s
standard adjustment and the position of the aluminium
rings is identified by the marks on the tube.
The attachment point of the left ring is slightly different
from the right one. This setting adjusts the effects of engine
torque (difference between 10 and 20 mm).
You may have to change this adjustment slightly for differ-
ent reasons such as comfort, pilot’s weight, or tandem flight
which could slightly change your flight position or also to
adjust your engine torque.
To do that, proceed as follows:
A - Adjustment of the propeller thrust axis :
The cage must be inclined from about 10 to 15
degrees according to the vertical of the level flight.
If you are rather at zero degrees (you are too upright),
you’ll have to move
the two rings
a few millimeters
forward according to the standard adjustment.
If you go beyond the 15 degrees (you are too
backward), you’ll have to move
the two rings
a few
millimeters backward according to the standard
adjustment.
Here is a small non-exhaustive table to give you an idea of your adjustment which is really
customizable
.
Pilot weight
Thor 130
Thor 200
Thor 250
50 kg to 60 kg
-10 mm to -20 mm
-10 mm to -20 mm
Pilot weight not advised
60 kg to 80 kg
Standard
Standard
Standard
80 kg to 100 kg
+10 mm to +20 mm
+10 mm to +20 mm
+10 mm to +20 mm
100 kg and more
+20 mm to 30 mm
+20 mm to 30 mm
+20 mm to 30 mm
MACFLY USER MANUAL
