12
Range Check your Radio System
After fi nal assembly, range check the radio
system with the Ultra Micro Stryker. Refer to
your specifi c transmitter instruction manual
for range test information.
CAUTION:
Keep hands away from the
propeller. Always assume the motor is pow-
ered on and that the propeller blades may
turn at any time.
Launching
Always inspect and repair model before fl ying.
Any damage or loose linkages may decrease
control in high-speed fl ight.
CAUTION:
Always launch the model
with the throttle set at 0% to avoid injury
from the propeller. When the model is
safely free of your hand, increase throttle to
between 60 and 100%.
Always launch your model at a very small
upward angle and directly into the wind,
even in a light breeze.
When launching your model for the fi rst time,
set the dual rate in your transmitter to the low
rate position.
Hand Launching
To hand launch the Ultra Micro Stryker, hold
the airplane in the fi nger grips on the under-
side of the airplane. Give a fi rm throw directly
into the wind slightly up (5–10 degrees above
the horizon) with the throttle all the way
down and the propeller not spinning. After
release, when the propeller is clear of your
hands, add throttle to climb.
Flying
Only fl y your Ultra Micro Stryker in light
winds. Always choose a wide-open space for
fl ying your Ultra Micro Stryker. 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.
For your fi rst fl ights, set your transmitter timer
to 5 minutes. Adjust your timer for longer or
shorter fl ights once you have fl own the model.
Over Current Protection (OCP)
The UM F-27Q Stryker is equipped with Over
Current Protection (OCP). This feature protects
the ESC from overheating. OCP stops the
motor when the transmitter throttle is set
high and the propeller cannot turn. The OCP
will only activate when throttle is positioned
just above 1/2 throttle. After the ESC stops the
motor, fully lower the throttle to re-arm
the ESC.
Landing
Land the model when you notice a reduction
in power. If using a transmitter with a timer, set
the timer so you have enough fl ight time to
make several landing approaches.
The model’s nose wheel and bottom fi n skids
let the model land on hard surfaces when
needed (which may damage the propeller).
Align model directly into the wind and fl y
down to the ground using 1/4 to 1/3 throttle
to keep enough energy for a proper fl are.
Before the model touches down, always
fully decrease throttle to avoid damage to
propeller, motor, ESC or other components.
Failure to lower the throttle
stick and throttle trim to the
lowest possible positions
during a crash could result
in damage to the ESC in the
receiver unit.
NOTICE:
Crash damage is not
covered under warranty.
Repairs
Repair the Ultra Micro Stryker using foam-
compatible CA (cyanocrylate adhesive) glue
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 a listing of all replacement and optional
parts, refer to the list at the back of
this manual.
NOTICE:
Use of foam-compatible CA acceler-
ant on your model can damage paint. DO NOT
handle model until accelerant fully dries.
Flying Tips and Repairs
Always
decrease throttle at
propeller strike.
EN
