Multiplex EasyGlider 4 Instrucciones De Montaje página 24

junction with the aero-tow coupling (# 72 3470), plus one Tiny-S
servo (# 6 5121). The aero-tow release servo fits in the fuselage
between the elevator and rudder servos, and should be installed
with the output shaft at the front (positioned at 180° to the other
servos, so that the output devices do not clash!).
An ideal combination for learning to aero-tow, and for actual ae-
ro-towing, is a FunCub and an EasyGlider 4.
For the tow you require a 20 m length of braided cable of 1 to
1.5 mm Ø. Tie a loop of nylon line (0.5 mm Ø) to the glider end
of the cable; this acts as a "weak link", in case the tow should go
badly wrong.
A loop in the other end of the towline should be connected to the
aero-tow coupling of the FunCub. Assemble the models, connect
them as described, and set them up directly into wind, the glider
behind the tug. Check that the towline is resting on top of the
FunCub's tailplane. The tug now rolls forward until the towline is
taut, and only then should the tug's pilot apply full-throttle. Both
aeroplanes accelerate: the tug stays on the ground initially, while
the glider lifts off, but the glider pilot keeps his model flying low
above the ground, directly in the wake of the tug; the tug can now
lift off safely. The two models should be kept climbing steadily, even
through turns. Avoid flying directly over your heads during the first
few attempts at aero-towing, as it is difficult to detect the models'
attitudes from this angle. To drop the tow, operate the transmitter
control which opens the tow release mechanism.
10. A FEW BASIC FUNDAMENTALS OF FLIGHT USING A
MODEL AIRCRAFT AS AN EXAMPLE
The movable control surfaces allow an aircraft (in this case a
model aeroplane) to be controlled around its three primary axes:
lateral (pitch), vertical (yaw) and longitudinal (roll). Operating the
elevator (Fig. 36) causes the model's attitude to change around
the lateral axis (the aircraft's nose rises or falls). When the rudder
is operated (Fig. 37) the model rotates around its vertical axis (the
aircraft swings to right or left). If the ailerons are deflected (Fig.
38) the aeroplane's attitude changes around the longitudinal axis
(the aeroplane banks to right or left). The two ailerons always
move in opposite directions: for a turn to the right, the right-hand
aileron deflects up, and the left-hand aileron down. For a left turn
the exact opposite applies.
Abb. 35
24
When air flows over a wing, the wing section (airfoil, cross-secti-
on through the wing) causes the air to move at different speeds
over the upper and lower surfaces. This results in a difference in
pressure between the top and bottom of the wing: the pressure
on the top of the wing is lower than that on the underside, and
the result is a force which we call lift. It is this force which keeps
the aircraft in the air.
The model aircraft's radio control transmitter is fitted with two pri-
mary sticks which are used to operate the control functions. The
EasyGlider 4 features the following control functions:
Elevator (up / down)
Rudder (right / left)
Ailerons (right / left)
Motor power (throttle)
The arrangement of the control functions shown here applies to
a transmitter set to stick mode 1. Alternative modes are possible.
The stick axis which controls the motor must not have a self-
centring action. Instead it is fitted with a ratchet or friction device.
Please refer to the operating instructions supplied with your radio
control system for information on how this setting works.
A model aircraft can only fly in a stable manner if the Centre of
Gravity and longitudinal dihedral are set correctly. The Centre of
Gravity (CG) is the point at which an aircraft balances level when
supported on the underside of the wings. Longitudinal dihedral
refers to the difference in angle between the neutral line of the
wing (measured at the wing root) and the tailplane.
Fig. 40
11. AND FINALLY ...
Model flying is a fascinating hobby, and an extremely rewarding
way of spending your leisure time. You can look forward to many
pleasurable hours spent in natural surroundings, enjoying the
excellent performance and good-natured handling of your Ea-
syGlider 4!
All of us in the MULTIPLEX team hope you have many hours of
pleasure building and flying your new model.
MULTIPLEX Modellsport GmbH & Co. KG
Fig. 36
Fig. 37
Fig. 38
Fig. 39