Protech ZOOM 425 ccpm Spécifications télécharger pdf (Page 227)

Chapter 31. Glossary

Glossary

120 CCPM

A type of CCPM using three servos arranged at equal 120 degrees from each other. The

advantage of 120 CCPM is the load of the swashplate is evenly distributed across all three

servos resulting in more precise control. 120 CCPM requires a special transmitter

("computer radio") which supports this mode.

90 CCPM

A type of CCPM using three servos arranged at 90 degrees to each other (and one spot

empty). On an ECO 8/16 using 90 CCPM there is a servo at the left, right, and front posi-

tions of the swashplate.

3D flying

A maneuver which requires the constant harmonized input of three or more controls simul-

taneously during the maneuver.

There is a good discussion of this at runryder.com/helicopter/t6270p1

Advancing blade

The rotor blade which is moving into the wind created by helicopter motion, thus increasing

its effective airspeed.

See also Retreating blade

Aileron

Airplane equivalent of left/right cyclic. Although a helicopter can provide cyclic movement

in all directions around the mast,not just left/right roll, this can still be a useful concept for

pilot orientation.

Airfoil (Aerofoil)

The shape of a wing (or a rotor blade) which produces lift. Different airfoils may be better

for different styles of flying.

Armature

See Rotor

Angle of Attack

The difference in angle between the direction of the chord of the rotor blades and the dir-

ection of the wind.

ARF or ARTF

Almost Ready to Fly. A pre-built helicopter which only requires installation of electronics.

AR Pin

Antirotation pin.

AR Arm

Antirotation arm.

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Protech ZOOM 425 ccpm Spécifications Page 227