Control Surface Throws - Hobbico Extra 300S Assembly Instructions Manual

Control Surface Throws

We recommend the following control surface throws:
Note: Throws are measured at the widest part of the
elevators, rudder, and ailerons.
ELEVATOR: (High Rate)
5/16" (8mm) up
and down
RUDDER: right as much
as possible
AILERONS: (High Rate)
7/16" (11mm) up
and down
The surface throws and balance for this aircraft have
been extensively tested. We are confident that they
represent the settings at which this model flies best.
Please set up your aircraft to the specifications listed
above. If, after a few flights, you would like to adjust the
throws to suit your tastes, that is fine. Too much throw
can force the plane into a stall or a surprise snap roll, so
remember..."more is not better."
Pre-Flight
Charge the batteries
Follow the battery charging procedures in your radio
instruction manual. You should always charge your
transmitter and receiver batteries the night before you
go flying, and at other times as recommended by the
radio manufacturer.
Balance the propeller
Balance your propellers carefully before flying. An
unbalanced prop is the single most significant cause of
damaging vibration. Not only will engine mounting
screws and bolts vibrate out, possibly with disastrous
effect, but vibration will also damage your radio receiver
and battery. Vibration will cause your fuel to foam, which
will, in turn, cause your engine to run rough or quit.
(Low Rate)
1/4" (6mm) up
and down
left as much
as possible
(Low Rate)
5/16" (8mm) up
and down
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We use a Top Flite Precision Magnetic Prop Balancer
(TOPQ5700) in the workshop and keep a Great Planes
Fingertip Balancer (GPMQ5000) in our flight box.
Find a safe place to fly
The best place to fly your R/C model is an AMA
(Academy of Model Aeronautics) chartered club field.
Ask your hobby shop dealer if there is such a club in
your area and join. Club fields are set up for R/C flying
and that makes your outing safer and more enjoyable.
The AMA also can tell you the name of a club in your
area. We recommend that you join AMA and a local club
so you can have a safe place to fly and have insurance
to cover you in case of a flying accident. (The AMA
address is listed on page 5 of this instruction book).
If a club and its flying site are not available, you need to
find a large, grassy area at least 6 miles away from any
other R/C radio operation like R/C boats and R/C cars
and away from houses, buildings and streets. A
schoolyard may look inviting but it is too close to people,
power lines and possible radio interference.
Ground check the model
If you are not thoroughly familiar with the operation of
R/C models, ask an experienced modeler to check to
see that you have the radio installed correctly and that
all the control surfaces do what they are supposed to.
The engine operation also must be checked and the
engine "broken-in" on the ground by running the engine
for at least two tanks of fuel. Follow the engine
manufacturer's recommendations for break-in. Check to
make sure all screws remain tight, that the hinges are
secure and that the prop is on tight.
Range check your radio
Wherever you do fly, you need to check the operation of
the radio before every time you fly. First, make sure no
one else is on your frequency (channel). With the
transmitter antenna collapsed and the receiver and
transmitter on, you should be able to walk at least 100
feet away from the model and still have control. Have
someone help you. Have them stand by your model and
while you work the controls, tell you what the various
control surfaces are doing.