摘要：i'm working on this project to build the 3d model of an r44 helicopter.that i can then use to create animations of different funct

i'm working on this project to build the 3d model of an r44 helicopter.that i can then use to create animations of different functions of the helicopter.

this is an update to the progress of that project.

as of this video，i've added all of the flight controls for the tail rotor and main rotor cyclic and collective.

although i've only completely rigged the kinematics of the tail rotor controls.

the main rotor controls are my next effort.

a helicopter pilot uses the tail rotor pedals in the cockpit to control the pitch of the tail rotor blades.

to demonstrate how this is done.

how control powers mechanically move from the front of the aircraft back to the tail rotor.

i'll cycle the animation slowly from full left pedal to full right pedal.

while i show the different components of the system on the left side of the screen.

you see the entire helicopter and on the right side.

you'll see a zoomed in view of the individual components within the tail rotor control system.

tail rotor control starts with pilot input to the pedals in the cockpit.

both the pilot and the co pilot each have a left and right tail rotor pedal and the left and right tail rotor pedals each have a separate pivot assembly.

that connects to the forward lower belt crank with the input of both pedal assemblies now.

combined that input is sent via a push rod to the lower aft belt crank.

and this belt crank redirects the tail rotor control vertically and up to the intermediate belt crank.

that's located near the main transmission.

aside from the direction change.

the intermediate velcrank also moves tail rotor control outward laterally.

so that it can physically bypass the clutch assembly from there.

this control motion is passed to a bell crank located just behind the clutch assembly.

this bell crank then passes control the a long push rod within the tail boom.

all the way back to the pitch control assembly mounted on the tail rotor gearbox.

that pitch control assembly directly controls the motion of the pitch change.

arms located on each side of the tail rotor blades.

i've also completed all of the push rods and belcranx for the main rotor controls.

although i'm still not done with the kinematic linkages in the animation software.

i started those linkages at the main rotor.

so i'll start there as i describe them and work down to the cockpit controls.

up up。

·these three push rods control the tilt and heave of the non rotating swash plate in order to pass three types of control inputs to the rotating swash plate and then the blades all three push rods move in unison to control collective bitch。

·the front two push rods move alternately side to side to control lateral cyclic pitch and the front and f push rods move alternately front to back to control longitudinal cyclic pitch。

·because the swash plate advance angle is almost 90 degrees the motion of the swash plate is almost a pure lateral motion in order to move the rotor blades at the 12 and 6 o'clock position of the aircraft and for lateral control。

·this is what we want lateral cyclic sticks should affect blade pitch change starting at six or 12 o'clock on the aircraft。

·but by the time those control inputs are felt 90 degrees later that swashblade tilt will result in lateral tilt of the rotor disc。

·these three control push rods extend to the lower fly controls the forward push rods directly to the lower controls and the f push rod via the jack shaft tube in a hydraulic r44。

·these push rods would be broken by a set of hydraulic actuators i didn't include those actuators in this model。

来源：回首亦江南