Glossary Of Terms - Hangar 9 P-51D Mustang Sport 40 ARF Assembly Manual

Checking the Control Horns
Inspect the control horns to make sure they have not
crushed the wood of the control surface. If so, remove the
control horn screws to remove the control horn. Place 2–3
drops of thin CA into each of the screw holes. In addition,
use a T-pin to poke small holes in the covering in the area
where the control horn mounts, then saturate the area with
thin CA. This will harden the wood and give the control
horns a solid surface to be mounted to.
Checking the Wheel Collars
Check the setscrews on the wheel collars for the main and
tail wheel to make sure they are not loose. Use a 1.5mm
hex wrench to tighten the setscrews. It is suggested if they
loosen frequently to remove them, apply threadlock to the
setscrews, then secure the wheel collars back into position.
The threadlock and hex wrench are included in the kit for
this purpose.
Check the Muffler Bolts
Check to make sure the bolts holding the muffler onto the
engine are tight and have not vibrated loose during flight.
Check the Engine Mount Bolts
Remove the spinner and propeller from the engine. Remove
the exhaust stacks from the fuselage, and then remove the
cowling from the fuselage. Remove the muffler from the
engine, and then use a Phillips screwdriver to make sure the
four bolts securing the engine to the mount are tight.
50

glossary of Terms

• Ailerons: Each side of this airplane has a hinged control
surface (aileron), located on the trailing edge of the
wing. Move the aileron stick on the transmitter left, the
left aileron moves up and the right aileron moves down.
Moving the left aileron up causes more drag and less lift,
causing the left wing to drop down. When the right aileron
moves down, more lift is created, causing the right wing to
rise. This interaction causes the airplane to turn or roll to
the left. Perform the opposite actions, and the airplane will
roll to the right.
• Clevis: The clevis connects the wire end of the pushrod
to the control horn of the control surface. A small clip, the
clevis has fine threads so that you can adjust the length of
the pushrod.
• Control Horn: This arm connects the control surface to
the clevis and pushrod.
• Dihedral: The degree of angle (V-shaped bend) at which
the wings intersect the fuselage is called dihedral. More
dihedral gives an airplane more aerodynamic stability.
Some sailplanes and trainer planes with large dihedral
dispense with ailerons and use only the rudder to control
the roll and yaw.
• Elevator: The hinged control surface on the back of the
stabilizer that moves to control the airplane's pitch axis.
Pulling the transmitter's control stick toward the bottom of
the transmitter moves the elevator upward, and the airplane
begins to climb. Push the control stick forward, and the
airplane begins to dive.
• Fuselage: The main body of an airplane.
• Hinge: Flexible pieces used to connect the control surface
to the flying surface. All hinges must be
glued properly and securely to prevent the airplane
from crashing.
• Horizontal Stabilizer: The horizontal flying surface of
the tail gives the airplane stability while in flight.
• Leading Edge: The front of a flying surface.
• Main Landing gear: The wheel and gear assembly the
airplane uses to land. It is attached to the bottom of the
fuselage.
• Pitch Axis: The horizontal plane on which the airplane's
nose is raised or lowered. By moving the elevator, you can
raise the airplane's nose above the pitch axis (climb) or
lower it below the pitch axis (dive).
• Pushrod: The rigid mechanism that transfers movement
from the servo to the control surface.
• Roll Axis: The horizontal plane on which the airplane's
wings are raised or lowered. By adjusting the ailerons,
you can drop a wing tip below the roll axis and cause the
airplane to bank or roll.
• Rudder: The hinged control surface on the vertical
stabilizer that controls the airplane's yaw. Moving the
rudder to the left causes the airplane to yaw left; moving
the rudder to the right causes it to yaw right.
• Servo: The servo transforms your transmitter commands
into physical adjustments of the airplane.
• Servo output Arm: A removable arm or wheel
that connects the servo to the pushrod (also called servo
horn).
• Spinner: Term describing the nose cone that covers the
propeller hub.
• Threadlock: A liquid that solidifies; used to prevent
screws from loosening due to vibration.
• Torque Rods: Inserted into the ailerons, these rigid
wire rods run along the wing's trailing edge, then bend
downward and connect to the pushrod.
• vertical Stabilizer: The vertical flying surface of the tail
gives an airplane stability while in flight.
• Wheel Collar: The round retaining piece that anchors
wheels in place on the wheel axle.
• Wing: The lifting surface of an airplane.
• Yaw Axis: The vertical plane through which the airplane's
nose rotates as it yaws to the left or to the right. The
rudder controls the yaw axis.
Hangar 9 P-51D Mustang Sport 40 Assembly Manual