E-flite UMX Yak 54 180 BNF - Manual (Page 11)

11
EN
We recommend fl ying your aircraft outside in no
greater than moderate winds, or indoors in a large
gymnasium. 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.
Takeoff
Place the aircraft in position for takeoff (facing into
the wind if fl ying outdoors). Set dual rates to low
position and gradually increase the throttle to ¾ to
full and steer with the rudder. Pull back gently on
the elevator and climb to check trim. Once the trim
is adjusted, begin exploring the fl ight envelope of
the aircraft.
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.
This aircraft is equipped with
Over Current Protection (OCP).
This feature protects the ESC
from overheating. OCP stops the motor when the
transmitter throttle is set too high and the propeller
cannot turn. The OCP will only activate when the
throttle stick is positioned just above 1/2 throttle.
After the ESC stops the motor, fully lower the
throttle to re-arm the ESC.
NOTICE: Crash damage is not covered under the
warranty.
Quique’s Propeller Balancing Tip
NOTICE: If the propeller is not balanced, the
aircraft may vibrate, causing the aircraft to operate
incorrectly and/or decrease the life of the servos.
Before making any adjustments, always ensure
the propeller has come to a complete stop and the
throttle and throttle trim are fully lowered.
NOTICE: Always use eye protection while balancing
a propeller or injury can result.
1. Typical propeller balancers may not yield
satisfactory results on small propellers.
Instead, test for vibration by carefully holding
the aircraft fuselage behind the wings while
increasing the throttle on your transmitter.
2. If you feel vibration, apply a small piece of clear
tape (approximately 20mm by 6mm, depending
on the thickness) evenly across the propeller
blade’s leading edge.
3. Test for vibration. Move the tape to the other
blade or remove tape in small amounts until
you decrease vibration to your satisfaction.
Repairs
Repair the aircraft using foam-compatible CA
(cyanoacrylate adhesive) or clear tape. Only use
foam-compatible CA, as other types of glue can
damage the foam. When parts are not repairable,
see the Replacement Parts List for ordering by
item number.
For a listing of all replacement and optional parts,
refer to the list at the end of this manual.
NOTICE: Use of foam-compatible CA accelerant on
your aircraft can damage paint. DO NOT handle the
aircraft until the accelerant fully dries.
IMPORTANT: The cellophane on the bottom of
the wing may show wrinkles. Wrinkles vary with
the passage of time. Wrinkles do not change the
aircraft’s fl ight performance.
NOTICE: When you are fi nished fl ying, never leave
the aircraft in direct sunlight or in a hot, enclosed
area such as a car. Doing so can damage the foam.
Flying Tips and Repairs
Always
decrease throttle at
propeller strike.
CAUTION