Hangar 9 Twist 60 ARF - Manual (Page 25)

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Glossary of Terms
•..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.
•.. 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.