Hangar 9 Twist 40 ARF Version 2 - Manual (Page 16)

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Adjusting the Engine Preflight
Control Throws
Range Testing the Radio
Recommeded CG
Step 1
Completely read the instructions included with your engine and
follow the recommended break-in procedure.
Step 2
At the field, adjust the engine to a slightly rich setting at full
throttle and adjust the idle and low-speed needle so that a
consistent idle is achieved.
Step 3
Before you fly, be sure your engine idles reliably,
transitions and runs at all throttle settings. Only when this is
achieved should any plane be considered ready for flight.
Charge both the transmitter and receiver pack for your
airplane. Use the recommended charger supplied with your
particular radio system, following the instructions provided with
the radio. In most cases the radio should be charged the night
before flying. Check the radio installation and make sure all the control
surfaces are moving correctly (i.e. the correct direction and
with the recommended throws). Test-run the engine and
make sure it transitions smoothly from idle to full throttle and
back. Also ensure the engine is tuned according to the
manufacturer’s instructions, and it will run consistently and
constantly at full throttle when adjusted.
The amount of control throw should be adjusted as closely as
possible using mechanical means, rather than making large
changes electronically at the radio. By moving the position
of the clevis at the control horn toward the outermost hole,
you will decrease the amount of control throw of the control
surface. Moving it toward the control surface will increase the
amount of throw. Moving the pushrod wire at the servo arm
will have the opposite effect. Moving it closer to center will
decrease throw, and away from center will increase throw.
Work with a combination of the two to achieve the closest or
exact control throws listed. Low Rate High Rate
Aileron: 1-inch (15°) up 1 5/8-inch (23°) up
1-inch (15°) down 1 5/8-inch (23°) down
Elevator: 1-inch (14°) up 2-inch (25°) up
1-inch (14°) down 2-inch (25°) down
Rudder: 1 3/4-inch (18°) left 2-inch (22°) left
1 3/4-inch (18°) right 2-inch (22°) right
Note: Control throws are measured at the widest part of the
elevator, rudder, and aileron unless noted otherwise.
Use the following throws for 3D aerobatics:
Aileron:
2 1/2-inch (35°) up 2 1/2-inch (35°) down
Elevator: 2 3/4-inch (35°) up 2 3/4-inch (35°) down
Rudder: 2 1/2-inch (28°) right 2 1/2-inch (28°) left
Check all the control horns, servo horns and clevises to make
sure they are secure and in good condition. Replace any items
that would be considered questionable. Failure of any of these
components in flight would mean the loss of your aircraft. Before each flying session, range-check your radio. This is
accomplished by turning on your transmitter with the antenna
collapsed. Turn on the radio in your airplane. With your airplane
on the ground, you should be able to walk 30 paces away from
your airplane and still have complete control of all functions. If
not, don’t attempt to fly! Have your radio equipment checked
out by the manufacturer.
An important part of preparing the aircraft for flight is properly
balancing the model. This is especially important when various
engines are mounted. Caution: Do not inadvertently skip this step!
The recommended Center of Gravity (CG) range for the Twist is
4–5-inches behind the leading edge of the wing against the
fuselage. It is suggested to start at the forward end of the
range until comfortable with the flight characteristics of your
aircraft. If necessary, move the battery pack or add weight to
either the nose or the tail until the correct balance is achieved.
Stick-on weights are available at your local hobby shop and
work well for this purpose.