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XP70 Instruction Manual
• Do not lubricate servo gears or motors.
• Do not overload retract servos during retracted or
extended conditions.
Make sure they are able to travel their full
deflection. Overloading or stalling a servo can
cause excessive current drain and cause damage to
your servo voiding the warranty.
• Make sure all servos move freely through their
rotations and no linkages hang up or bind. A
binding control linkage can cause a servo to draw
excessive current. A stalled servo can drain a
battery pack in a matter of minutes.
• Correct any control surface “buzz” or “flutter” as
soon as it is noticed in flight, as this condition can
destroy the feedback potentiometer in the servo. It
may be extremely dangerous to ignore such “buzz”
or “flutter.”
• Use the supplied rubber grommets and brass servo
eyelets when mounting your servos. Do not over-
tighten the servo mounting screws, as this negates
the dampening effect of the rubber grommets.
• Ensure the servo horn is securely fastened
to the servo. Use only the JR
®
servo arm
screws provided; the size is different from other
manufacturers.
• Discontinue to use servo arms when they become
“yellowed” or discolored. Such servo arms may be
brittle and can snap at any time, possibly causing
the aircraft to crash.
• Check all related mounting screws and linkages
frequently. Aircraft often vibrate, causing linkages
and screws to loosen.
Servo Precautions
General Notes
Radio controlled models are a great source of pleasure.
Unfortunately, they can also pose a potential hazard if not
operated and maintained properly.
It is imperative to install your radio control system
correctly. Additionally, your level of piloting competency
must be high enough to ensure that you are able to control
your aircraft under all conditions. If you are a newcomer
to radio controlled flying, please seek help from an
experienced pilot or your local hobby shop.
Safety Do’s and Don’ts for Pilots
• Ensure your batteries have been properly charged
prior to initial flight.
• Keep track of the time the system is turned on so
you will know how long you can safely operate your
system.
• Perform a ground range check prior to the initial
flight of the day. See the “Daily Flight Checks
Section” for information.
• Check all control surfaces prior to each takeoff.
• Use frequency flags.
• Do not fly your model near spectators, parking
areas or any other area that could result in injury to
people or damage of property.
• Do not fly during adverse weather conditions.
Poor visibility can cause disorientation and loss
of control of your aircraft. Strong winds can cause
similar problems.
• Do not fly unless your frequency is clear.
WARNING
: Only one transmitter at a time can
operate on a given frequency. If you turn on your
transmitter while someone else is operating a model
on your frequency, both pilots will lose control
of their models. Only one person can use a given
frequency at a time. It does not matter if it is AM, FM
or PCM—only one frequency at a time.
• Do not point the transmitter antenna directly toward
the model. The radiation pattern from the tip of the
antenna is inherently low.
• Do not take chances. If at any time during flight
you observe any erratic or abnormal operation,
land immediately and do not resume flight until
the cause of the problem has been ascertained and
corrected. Safety can never be taken lightly.
Section 8: General Information
