Secondary Controls - Magni Gyro M16C Ordinary Maintenance Manual

2.4.2 SECONDARY CONTROLS
"Secondary controls" are all the controls of not primary importance that the pilot can use to allow safety and
comfort of flight.
These types of controls are listed below:
3.9.1 ‐ choke control line;
3.9.2 ‐ rotor brake control line;
3.9.3 ‐ brake system cables line;
3.9.4 ‐ prerotation control line;
5.1 ‐ trim control line;
The transmission of the movements and the pulls required to operate these services or specific systems occur
through 1,5 mm diameter zinc plated steel cables (2 mm diameter for the trim line) that run in metallic sheathings,
with a plastic film on the outside and Teflon covering on the inside.
This type of control line can suffer from oxidation of the inner part of the cables which, in case of high humidity,
rain or careless washing, may occur in the lower part of the sheaths, thus causing considerable stiffening of the
control levers.
WARNING:
If periodical maintenance of these cables is missing, the cables might break causing a complete
ineffectiveness of the system. In the worst of cases, the broken and oxidized cable might be impossible
to extract from the sheathing, and the replacement of both the cable and its sheathing become
necessary. To avoid these problems, it is strongly recommended to respect the ordinary maintenance
schedule indicated in the maintenance manuals.
2.4.3 RUDDER PEDALS SYSTEM
The control on the vertical axis is gained by the rudder pedals system used by the pilot to yaw the gyroplane during
flight and to direct it in ground manoeuvring such as taxiing and parking.
The rudder pedals control line starts with pedals pn 071‐072 and pn 080‐081, which are connected one to the
other through rigid rods and ball joint ends. The movement of the pedals occurs on bushes.
The front pedals pn 071‐072 are furthermore connected one to the other by rigid rods and ball joint ends, through
the control block pn 277, on which the stem of the fork pn 093 of the front wheel is fixed, and through the spacers
pn 077.
When the pilot pushes one of the pedals, it makes the front wheel turn to the same side (right foot‐right turn). The
rotation of the fork pn 093 as to the main structure's tube occurs on 2 conical roller bearings; the lock nut KM4
screwed to the fork stem guarantees the tightening of the fork‐bearings assembly.
The lock nut KM4 is furthermore locked by the transmission unit pn 227.
The cables of the rudder pedals line are fixed to the rear pedals through two turnbuckles.
The line cables operate three misaligned couples of pulleys pn 084, which lead to the pivot pn 086 of the rudder pn
091.
The movement of the pivot pn 086 occurs on two thrust bearings pn 6002 ZZ placed in the special housing in the
main structure.
Thus, the pressure exerted on the pedals allows control of the rudder, fixed to the pivot pn 086, and to manage or
correct the gyroplane's yaw while flying.
PAGE
26
M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
ISSUE
A_November 2012