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The merkhet (L-shape), plumb bob and bay (V-notch) are tools used by ancient egyptians to keep time based off the North star. They may have also been used to align what they were building with celestial bodies. By using two observers, two bays and two merkhets you can establish a north south line. This line can be referenced when it is crossed by certain stars to keep the time, a powerful tool to tell time at night when sundials won't work.

As for printing, any settings should work, I used PLA with a .3 layer height 15% support cubic infill. Supports should only be needed for the body of the plumb bob which should be printed upside down. I also made the bob hollow so it can be filled with sand or other ballast if you happen to try this on a windier night.

For assembly you'll need a piece of string/paracord 1 meter (ish) long, and ballast (if you like). First thread one end of the string or paracord through the handle of the merkhet and tie it off, and thread the other end through the cap of the bob. If your string isn't thick enough you may need to tie multiple knots. Lastly, fill the bob with your ballast if you're going that root and screw the cap on.

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It\u2019s time for our next contest and this time it\u2019s all about time. Seconds, minutes, hours, days, weeks, months, and years, we want to see your ideas for the age-old problem of how to measure and track the moments of our lives.

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