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Great Ball Contraptions are fascinating and I designed two GBC modules that use LEGO slides for getting the balls up and down. The first uses a ball pump to push the balls up through the tower. The balls then roll down a double helix: The second modules uses the double helix for an Archimedes Screw. This is a very effective method of lifting balls up. -
Good day! I have seen many helicopter MOCs that inclined the main rotor to go in that direction. But real helicopters don't work like that. The cyclic control changes the pitch of the propeller blades unevenly what inclines the helicopter in the desired direction Here is a good page that explains in detail the controls of a helicopter The LDD is at 0% Functions: cyclic control - inclines and flies the helicopter in the desired direction anti-torque pedals - the "steering" collective control - the altitude control Enought speaking here are the pics, expect the video soon I wanted to make all the mechanisms visible , so no bodywork Bricksafe