E-flite UMX Habu S DF180m BNF - Manual (Page 11)

11
EN
Flying Tips and Repairs
Range Check your Radio System
After fi nal assembly, range check the radio system
with the aircraft. Refer to your specifi c transmitter
instruction manual for range test information.
Flying
We recommend fl ying your aircraft outside in no
greater than moderate winds or inside in a very
large indoor facility. Always avoid fl ying near
houses, trees, wires and buildings. You should also
be careful to avoid fl ying in areas where there are
many people, such as busy parks, schoolyards or
soccer fi elds. Consult local laws and ordinances
before choosing a location to fl y your aircraft.
Hand Launching
Hold the aircraft under the wings. Give a fi rm throw
directly into the wind slightly up (5–10 degrees
above the horizon) with full throttle. After the model
gains altitude, decrease the throttle as you desire.
Tip: The electric ducted fan (EDF) acts like a jet
aircraft, so control is generated by airspeed rather
than air from a propeller moving over the control
surfaces. It is recommended to use Panic Recovery
while hand launching.
Takeoff
Taxi the aircraft in position for takeoff (facing into
the wind if fl ying outdoors). Gradually increase the
throttle to full power, holding a small amount of up
elevator and steering with the rudder. Climb gently
to check trim. Once the trim is adjusted, begin
exploring the fl ight envelope of the aircraft.
Landing
Always land into the wind. Fly the landing pattern
with a slightly nose high attitude. Use throttle
management to control the decent rate of the
aircraft.
During fl are, keep the wings level and the airplane
pointed into the wind. Gently lower the throttle while
pulling back on the elevator to bring the aircraft
down on the main wheels or to belly land without
landing gear.
NOTICE: Always fully lower the throttle when landing
the aircraft to prevent intake of foreign objects,
which can damage the ducted fan and motor.
Failure to lower the throttle stick and trim to the
lowest possible positions during a crash could result
in damage to the ESC in the receiver unit, which
may require replacement.
Low Voltage Cutoff (LVC)
When a Li-Po battery is discharged below 3V per
cell, it will not hold a charge. The aircraft’s ESC
protects the fl ight battery from over-discharge
using Low Voltage Cutoff (LVC). Once the battery
discharges to 3V per cell, the LVC will reduce the
power to the motor in order to leave adequate
power to the receiver and servos to land the
airplane.
When the motor power decreases, land the aircraft
immediately and replace or recharge the fl ight
battery.
Always disconnect and remove the Li-Po battery
from the aircraft after each fl ight. Charge your Li-Po
battery to about half capacity before storage. Make
sure the battery charge does not fall below 3V per
cell. Failure to unplug a connected battery will result
in trickle discharge.
Tip: Due to the quiet nature of the aircraft, you may
not hear the pulsing of the motor.
For your fi rst fl ights, set your transmitter timer or a
stopwatch to 3 minutes. Adjust your timer for longer
or shorter fl ights once you have fl own the model.
Flights of 4 minutes are achievable if using proper
throttle management.
NOTICE: Repeated fl ying to LVC will damage the
battery.
Tip: Monitor your aircraft battery’s voltage before
and after flying by using a Li-Po Cell Voltage
Checker (EFLA111, sold separately).
Over Current Protection (OCP)
The aircraft is equipped with Over Current
Protection. OCP protects the ESC from overheating
and stops the motor when the transmitter throttle is
set too high and the rotor cannot turn. OCP will only
activate when the throttle is positioned just above
1/2 throttle. After the ESC stops the motor, fully
lower the throttle to re-arm the ESC.
For maintenance and repair information refer to the
product page on www.horizonhobby.com.
Fly in this area
Stand here
600
feet (182.8 m)
Wind