Specifications

grams AUW. This includes the Ikarus Piccolos, MS Hornets, Century Hummingbird, Feda,
GWS Dragonfly, MIA Housefly, Wes-Technik Helistar LH35, etc.
N
Nose-In
Hovering or maneuvering with the nose of the helicopter pointed at the pilot. This is a ad-
vanced step in the learning stages of flying a helicopter because both roll and pitch con-
trols are reversed relative to the pilot.
O
Outrunner motor
A motor where the outside of the can rotates. This is also called "rotating can" or "external
rotor" by some distributors.
P
Paddles
These are the shorter stubby blades on the end of the two rods opposite the rotor blades.
These aid in pitching the main rotor blades for quicker responses and less servo stress.
PCM
Acronym for Pulse Code Modulation A generic term for digitally encoded data.
PPM
Acronym for Pulse Position Modulation. Same as FM. An analog form of encoding data.
Pirouette
A spinning maneuver where the helicopter yaws around the main mast one or more times.
Pitch Curve
A transmitter feature which allows adjustment of the translation from throttle stick position
to the collective pitch position so the mapping is not linear. Most transmitters have a three-
point or five-point pitch curve which allows you to set the collective pitch at the 0%, 50%,
100% or 0%, 25%, 50%, 75% and 100% stick positions. When the throttle stick position is
between two points, the transmitter will linearly interpolate between the two nearest pitch
curve points.
See also Throttle Curve
Pitch Meter (or Gauge)
A measuring device used to check the varying pitch settings of your rotor blades and
paddles. You need the pitch of the corresponding blades to be very close or they will not
track evenly.
Pod-and-Boom
A style of helicopter model that derives its name from the appearance of its short fuselage
and tail-support boom. This is the usual style for most R/C helicopters, since it is easier to
fly and maintain than one with a scale fuselage.
Pusher tail rotor
A tail rotor that pushes air away from the tail boom. Most helicopters including the Corona,
ECO 8, Logo 10 use a pusher tail rotor.
Glossary
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