Multi. pb01, Technic, Brick 1 x 2 with Hole and Yellow Arrows Pointing Down on Both Sides (Stickers) – Set (Common Combination of Parts – May Not. LEGO set database: Control Centre II. Set number: ; Name: Control Centre II; Set type: Normal; Theme group: Technical; Theme: Technic; Year. View LEGO instructions for TECHNIC Control II set number to help you build these LEGO sets.

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The output pulleys shown tchnic green are used as cranks. Roll The roll of the helicopter is motorized and controllable via the up and down motion of the control pad. Once a memory is selected, you can push Program and the system will record your inputs, including duration, and including 84855.

This particular unit is nearly identical to that found in except that the buttons are a different color and it has an input for a transformer! The left and right side tecnhic degrees out of phase and each holds a pair of flex cable ends. In this case, they are motorized to turn at the same rate via a motor located in the body at the approximate position a turbine would be located in a real helicopter.

This allows it to be powered from a wall plug instead of using up dozens of batteries. When you are done recording the program, you push Stop and it is stored to memory, even if the unit is switched off.

LEGO Technic Control Centre II () | eBay

As can be seen in the computer image, the high speed motor drives through a silicone belt blue. Finally, a worm gearbox hidden drives and supports the green axle of the gimbal with a pair of rotors such that rotation of the axle directly produces oego of the gimbal. The final axle drives the wheel. Note the fact that the helicopter linkage moves a greater vertical distance than the Control Center linkage. The mechanism to control the elevation legk rather complex and is pictured at right. Click for an animation of the drive system in motion.


Click for an animation of the head and tail in motion. A final reverse gear ratio using spur gears actually speeds the propeller back up. There are two memory sections which the Control Center can toggle between. Fan 8458 Drive System. Click for an animation of the dinosaur tipping. Rotors Like virtually all Technic helicopters, the main and tail rotors rotate. Oddly, the lower jaw does not really move but rather is fixed at a 90 degree and to the neck which does move.

It can rotate on two axes independently or together: Arms and Jaw The arms swing up and down and the jaw opens and closes using a motor in the front of the torso. Techhic flex axle connects here shown in yellow and attaches to the movable upper jaw. Movement of the forward cables tips the head side to side, and movement of the rear cables swings the tail side to side.

Steering The hidden rear wheel can be steering using a second motor in the body. It is not immediately obvious from simply playing with the Control Center, but the manual tells you how to lock the rotors on so the buttons don’t have to be held.


The gearbox both drives and supports a 24 tooth spur gear. There is obviously some limit to the amount of memory on the system so it can only record a certain number of inputs, however, I have technicc found the limit. The yellow link is the key to the whole thing.


The output axle shown in green turns a pair of liftarms which use push rods to rotate the dinosaur at its pivot axle on the stand. The helicopter is mounted to the stand with a box structure called a gimbal.

LEGO Technic Control Centre II (8485)

The cranks oscillate the blue arms up and down. A worm gearbox in the stand allows the pitch rotation nose up and down about 40 degrees. The left and right side are degrees out of phase. The yellow outputs are labeled “N-S” and “E-W”. The first stage is actually two belts in parallel which drive an 8 tooth pinion gear.

Both the head and the tail form a pull-pull loop. Click for an animation of the arms and jaw in motion. The output pulleys shown in yellow are used as cranks. The red output is labeled “A-B” and is controlled by the two red buttons on the left with the same labels.

The second pulley drives a worm gearbox hidden.

The use of belts rather than gears allows the pulleys to slip rather than stall the motor when the helicopter hits the stops. Note that batteries must be installed in the Control Center even if you are not using them to get the balance right.

The final image shows the nose up and down positions superimposed for comparison. Elevation change is the only non-motorized function of the model.