🔧 RC Crash Crew

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🔤 RC Glossary

Every RC term, decoded

Cars, crawlers, boats, planes, helis, drones, tanks and radios — every real term, plain English, no jargon left behind. New to RC? Start here.

447

Terms

17

Categories

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Cross-linked to the Wiki, Guides and Tuning Guide.

A

🚁 Autorotation An emergency landing technique that uses the main rotor's stored mo…

B

🚁 Bell-Hiller The mixing ratio between direct swashplate input and flybar input o… 🚁 Blade Tracking Whether a helicopter's main blades spin in exactly the same rotatio… 🚁 Boom Strike When a main blade flexes down far enough to hit the tail boom.

C

🚁 CCPM (Cyclic/Collective Pitch Mixing) A swashplate design where three servos spaced 120 degrees apart sha… 🚁 Collective Pitch Changing all main blades' pitch angle together to control lift, ind…

F

🚁 Feathering Shaft The shaft at the rotor head that lets each main blade pitch (rotate… 🚁 Fixed Pitch A helicopter whose main blades are set at one unchanging angle, so… 🚁 Flybar A stabilizing bar mounted above an older-style rotor head that mech… 🚁 Flybarless A modern rotor head design that uses an electronic gyro for stabili…

G

🚁 Governor A system that holds the main rotor RPM constant regardless of load,… 🚁 Gyro Gain How hard the tail gyro pushes back when it detects unwanted yaw.

H

🚁 Head Dampers Rubber or elastomer bushings in the rotor head that cushion the bla… 🚁 Heading Hold A tail gyro mode that actively locks the helicopter's nose directio… 🚁 Headspeed The rotational speed of the main rotor, in RPM — the single number…

I

🚁 Idle-Up A flight mode that keeps rotor speed high and constant while the co…

M

🚁 Main Blade One of the two (or more) blades mounted on a helicopter's main roto… 🚁 Main Shaft The central vertical shaft that the main rotor head and blades are…

P

🚁 Pitch Curve The transmitter setting that maps collective stick position to main… 🚁 Pitch Gauge A tool used to measure and set a helicopter's main blade pitch angl…

R

🚁 Rotor The spinning main blades that generate a helicopter's lift.

S

🚁 Size Class (450 / 500 / 700) The shorthand numbers used to describe how big a helicopter is, fro… 🚁 Swashplate The mechanical assembly below the rotor head that tilts the main ro…

T

🚁 Tail Boom The tube running back from the frame that carries the tail rotor as… 🚁 Tail Drive (Torque Tube / Belt) How power gets from the main gear back to the tail rotor — either a… 🚁 Tail Rotor The small rotor at the tail that counters the main rotor's torque a… 🚁 Throttle Curve The transmitter setting that maps stick position to engine or motor… 🚁 Throttle Hold A switch that drops the engine to idle or cuts the motor entirely w…