8
Taurus 50
Auto-rotation (hold-mode):
This function is designed to enable the pilot to carry out an
auto-rotation landing („auto“). The motor is stopped, or
reduced to idle; the rotor blades are set to negative pitch, and
the model „glides“ down on the rotor blades. Just before the
model lands, the kinetic energy of the spinning rotor is
exploited by setting the blades to positive pitch, and the
model flares out and lands.
Standard values:
Hold position:
approx. 10% (idle)
Coll. pitch max.: 100%
Coll. pitch min.:
100%
All the stated values are just a guideline; you will need to
establish the exact settings during the test-flying procedure.
Practical notes for the beginner to helicopter flying
The relationship between stick movements and helicopter
movements
A: Rotation (yaw) to the right
B: Rotation (yaw) to the left
C: Roll to the right
D: Roll to the left
E: Pitch forward
F: Pitch back
G: Climb
H: Descend
Pre-flight check-list, starting procedure
Always check before a flight that the controls operate in the
correct direction (control „sense“), and there are no unusual
noises caused by mechanical friction, deformation, or servos
or pushrods striking their end-stops.
1) Before switching on your radio control system check that
your channel is not already in use (same channel
interference!).
2) Switch on your radio control system (transmitter first, then
receiver) and check that all the functions operate correctly.
Carry out a range check as described in the radio system
operating instructions.
3) The carburettor must be moved to idle before you start the
motor. Read the operating instructions supplied with your
motor for the correct settings. Adjust the needle valve as
described in the instructions. The needle setting
recommended by the manufacturer may vary by 1/4 to 1/2
a turn according to the fuel and glowplug you are using.
4) Fill the fueltank and connect the glowplug to the glow clip
(e.g. No. 6085).
5) The motor should be started using a 12 V starter (e.g. No.
4001) fitted with a 6 mm hexagon adaptor (e.g. No. 1400).
Note:
ensure that the starter is wired to spin the motor in the
correct direction.
Once the motor has started and is running smoothly, raise
motor speed steadily until the model lifts off.
The next step is to trim the model accurately - see page 18.
The first part of flying you should practise is hovering. The
helicopter must be capable of hovering motionless in the air.
The hover is the most fundamental flight manoeuvre, and it
must be learned thoroughly before you move on.
Once you are confident about hovering your helicopter, you
can try flying the model slowly to each side, keeping at a
height of around 1.5 m. This is the first step in mastering a
circuit.
Trimming out
All helicopters are neutrally stable by their nature. If a
helicopter is correctly trimmed, it will not drift off swiftly, or
rotate. Trim out your helicopter following this procedure:
1) If the helicopter’s nose starts to swing (yaw) to right or left,
use the tail rotor trim on your transmitter to correct this:
(A)
Right yaw
(A)
Move trim in direction (b)
(B)
Left yaw
(B)
Move trim in direction (a)
2) If the helicopter rolls to right or left, use the roll function
trim to correct this:
(C)
Right roll
(C)
Move trim in direction (d)
(D)
Left roll
(D)
Move trim in direction (c)
3) If the helicopter pitches forward or back, use the pitch-axis
trim on your transmitter to correct this:
(E)
Pitch forward
(E)
Move trim in direction (f)
(F)
Pitch back
(F)
Move trim in direction (e)
Maintenance, post-flight checks
1) Check that all screws and nuts are tight; they may have
become loose through vibration.
2) Check that all moving parts are free-moving and working
normally.
3) Clean all fuel and exhaust residues from the silencer,
motor and model.
4) Check all moving parts for unusual rates of wear, including
gearbox, ball-links, toothed belt, etc.
Important:
After flying the model helicopter for the first time please take
the trouble to check that all screwed joints are still tight; this
applies in particular to the power train components and the
rotor system. All the following areas of the helicopter should
be re-greased or oiled at intervals of two or three hours:
