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The Challenge: Build accurate clocks

How can we make a chiming clock?

In an attempt to make a chiming clock, we constructed a water clock as we couldn't think of a way of making a chiming clock out of a sundial.

We placed a huge barrel at a height of about three meters (10 feet) and a second large barrel lower down. Size was important — the bigger the barrel, the higher the volume of water and the more power to make a big noise. For the clock to be accurate, we need a constant flow of water. But drilling a hole in the higher barrel and allowing the water to flow freely wouldn't work because as the water level drops so too does the water pressure.

Water clock