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 red flex cable supports the weight of the head and remains fixed in position while the yellow cable performs the movements. 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 computer image shows the horizontal links in gray and the vertical links in green. Movement of the forward cables tips the head side to side, and movement of the rear cables swings the tail side to side. The 3 motors are integrated such that they can hardly be noticed, and even the wiring tucks away and tchnic bundled with a rare ldgo of silicone helical loops seen in some of the photos in white. When the Control Center is lifted, the helicopter descends into a gentle landing on the attached landing pad.

Lego Technic Control Center 8485 -rarit├Ąt-

The 24 tooth gear at tecbnic front of the assembly does not actually do anything, it is merely meant to represent the spinning compressor fan of a turbine.

Click for an animation of the drive system in motion.

The use of belts rather than gears allows the pulleys to slip rather than stall the motor when the rotor is started or stopped. Click for an animation of the arms and jaw in motion.

As can be seen in the computer image, the high speed motor drives through 2 different silicone belts red. The red output is labeled “A-B” and is controlled by the two red buttons on the left with the same labels. Once a memory is selected, you can push Program and the system will record your inputs, including duration, and including pauses.


Click for an animation of the rotors in motion. This marvelous helicopter is nearly the best ever produced in the Technic line with the possible exception of The landing pad is static and remains at the same level.

There is a battery compartment on the bottom which holds 6 C sized batteries LR14 in series, producing a total of 9 volts DC. The Control Center is actually used as a counterweight which acts against the helicopter via a pair of 4-bar linkages.

Tail and Head The tail and head wag side to side using a motor in the back of the torso via a system of flexible cables. The computer image shows the horizontal links in black and the vertical links in red. The helicopter is mounted to the stand with a box structure called a gimbal.

The yellow outputs are labeled “N-S” and “E-W”. 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 mechanism to control the elevation is rather complex and is pictured at right.

Control Centre II | Brickset: LEGO set guide and database

Depression of the Control Center raises the helicopter. A set of bevel gears then drives torque into a third belt white which drives a new worm gearbox hidden. In consists of a pair of nested 4-bar linkages which are linked via a central connection.

The organic movements would be much more difficult to replicate with gear systems. It can rotate on two axes independently or together: 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. Click for an animation tecjnic the dinosaur tipping. Image by Benjamin Wendl Click for an animation of the helicopter pitching. This is due to the fact that the yellow coupling attaches to the inner linkage one stud further from the rotation axis than it does to the 84885 linkage. Steering The hidden rear wheel can be steering using a second motor in the body.


Image by Benjamin Wendl Click for an animation of the helicopter rolling. Control Center The Control Center is the heart of this set.

Instructions For LEGO 8485 TECHNIC Control II

The final axle drives the wheel. Pitch The pitch of the helicopter is motorized and controllable via the side to side motion of the control pad.

A comparison of the images at the two extreme positions shows the change in muscle and tendon geometry. Elevation The mechanism for controlling elevation of this helicopted lwgo ingenious. Bending The dinosaur can bend down and lower its head almost to the Control Center using a motor mounted in the support stand.

The weight and lever arm are accurate enough a counterbalance with the addition of internal friction that the helicopter stays up. The lwgo gear reduction is 3: At this point the gear system splits into two parallel paths. The inner linkage is made mostly from gray beams and support the helicopter. Note in the photographs that a number of wires have to be carefully routed through leyo area without interfering with the motion of the parts.

A set of bevel gears then drives torque into a set of 8 and 24 tooth spur gears on the right side of the body. Each control in and of itself is lovely to watch, but the beauty of the Control Center is that all three can be operated concurrently. The second pulley drives a worm gearbox. A pinion gear on the motor drives a 24 tooth crown which then drives the belt system.