By the third century AD at the latest, the Chinese had a fully operational, navigational 'cybernetic machine', using the principles of feedback. It was called the 'south-pointing carriage', but had no connection with a magnetic compass. It was a large carriage, 3.3 metres long, 3.3 metres deep, and 2.75 metres wide, surmounted by a jade statue of an 'immortal''-a sage who had achieved immortality. The figure's arm was raised, pointing ahead, and it always faced towards the south, no matter which way the carriage turned. Even if the road were circular, the jade figure would rotate, keeping the finger pointingin the same direction. How was this possible in the third century AD?

to the project:
SouthPointingChariot

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