Ground Effect; Free Flying Training - Carson EC-135 Rescue Manual Del Usuario

Hover flight
GB
Hover flight means maintaining the helicopter in a stable
position in the air. Hover flight is only possible with a helicopter
and must be thoroughly practiced as a fundamental flight
formation. Acquaint yourself with the control functions of your
remote control transmitter so that this procedure gets you're
your "flesh and blood".
• Then set the helicopter about 2 m in front of you on the
ground, with the tail facing you.
• Leave the helicopter on the ground and first deliberately
move it slightly sidewise, forwards and backwards.
• When you have mastered control on the ground, give
somewhat more lift and permit it to hover above the ground,
without allowing the tip of the fuselage to turn or the
helicopter to drift away.
• The best procedure is to mark a position on the ground from
which you start the model.
• Attempt to hold the helicopter above this position and also
to land again on this position.
• Do not move the control lever too jerkily, because otherwise
especially the touchdown can be very hard.
• Develop a feeling for the controls by repeatedly lifting off,
floating and landing again.
g. Ground Effect
ATTENTION!
Up to a height of about 30 cm, the model
is in the area of influence of the air
turbulence caused by its own rotors.
On one hand, this "ground effect" facilitates the lift off of the
helicopter since the air pressed downwards by the rotors of the
helicopter helps lift the aircraft from the ground.
But in the immediate area this effect is reversed, since the air
flowing away laterally from the helicopter creates an underpres-
sure and the model is actually sucked back down towards the
ground. This can lead to an ungentle landing.
h. Free flying training
The helicopter is no longer in the area of influence of the air
turbulence from its own rotors as of a flying height of about 2 m
and the flight situation is more stable.
If you have mastered hover flight, begin
with simple flying formations:
• Train your command of the model, allow it to ascend and
descend, hover and move forwards and backward in the air
as well as execute turns.
20 CARSON Helikopter EC-135 Rescue 50 050 7031
• If you notice irregularities in the control or an imbalance in
the rotor,
immediately
• Land and correct the necessary settings.
• Increase the flying height gradually by degrees.
For this reason the
flight behaviour of
the model at low
heights is rather
unstable. If the
restless flight
behaviour causes
difficulties for you,
increase the flying
height by degrees.