Carl Goldberg GPMA1956 Eagle 2 ARF - Manual (Page 3)

ARC: Almost Ready to Cover
ARF: Almost Ready to Fly
AILERON: the control surface on the wing that rolls (or
banks) the plane
AIRFOIL: the shape of the wing as seen from the end
ANGLE OF ATTACK: the angle at which the wing meets
the air flow
BEVEL: to sand to an angle shape
BURR: the rough edges on a piece of wood or metal after
it is cut
CAP STRIP: a thin strip glued to the edges of the ribs to
shape the wing
CONTROL HORN: a device attached to each control sur-
face to provide an attachment point for the pushrod
COWL (COWLING): the nose section of the fuselage that
encloses the engine
DECALAGE: the difference between the incidence of the
wing and stabilizer
DIHEDRAL: the upward angle of the wings, as seen from
the front
ELEVATOR: the moveable part of the horizontal tail, which
controls pitch
EMPENNAGE: the tail of the plan
FIN: the fixed vertical part of the tail
FIREWALL: the plywood former at the front of the fuse-
lage, to which the engine is mounted
FORMER: a piece which shapes the fuselage; and to
which the sides of the fuselage are attached.
GUSSET: a small triangular piece glued into a corner to
strengthen it
INCIDENCE: the angle of the wing or the tail in relation to
the thrustline
LAMINATE: to glue two thin pieces of material together to
form a thicker, stronger piece
LEADING EDGE (L.E.): the front edge of the wing that
first meets the airflow
LONGERON: a stringer that runs the length of the fuse-
lage
PITCH: an up and down movement of the nose of the
plane, which is controlled by the elevator
PROTOTYPE: the full scale airplane from which the model
design was taken
PUSHROD: the long, stiff dowel or wire that connects the
servo with the control horn
RECEIVER ("Rx"): Receives radio signal
RETRACTS: (Retractable Landing Gear) devices for
extending and retracting the wheels on command
3
RTF: Ready to Fly
RIB: the airfoil-shaped piece that connects the leading
edge, spars and trailing edge of the wing together and
holds them in shape
ROLL: tilting of the plane as viewed from the front, con-
trolled by the ailerons
RUDDER: the moveable vertical tail of the plane, which
controls yaw
SERVO: the part of the airborne radio system that moves
the control surfaces
SERVO ARM (OUTPUT ARM, SERVO WHEEL): the
piece that attaches to the servo and connects it to the
pushrod
SHEAR WEB: wood sheeting that connects the top and
bottom spars to stiffen the wing
SHIM: a thin piece of wood or other material inserted
between two other pieces to improve their fit
SPAR: a wooden stick running lengthwise through the
wing that serves as its backbone
SPINNER: the rounded cone that fits over the propeller
hub
STABILIZER (STAB): the fixed horizontal part of the tail
STALL: a situation in which the plane is flying too slowly
to move sufficient air across the wing to produce lift
STRINGER: a long piece of wood attached to the formers
to shape the fuselage
THRUSTLINE: a line drawn from the center of the pro-
peller hub straight through the airplane
TORQUE: a rolling tendency caused by the spinning pro-
peller
TRAILING EDGE (T.E.): the edge of the wing that faces
the rear of the plane
TRANSMITTER ("Tx"): Transmits radio signal to servos
TRIM: small adjustments made to the control surfaces to
cause the plane to fly straight and level by itself
WASHIN: a twist in the wing that makes the trailing edge
lower than normal
WASHOUT: a twist in the wing that makes the trailing
edge higher than normal
WING SADDLE: the shaped part of the fuselage in which
the wing rests
WHEEL COLLAR: a metal ring that holds the wheel on
the axle
YAW: a right-to-left movement of the nose, controlled by
the rudder
GLOSSARY
of common modeling terms