This is a very simple It's About Time metronome / pendulum clock for the 2016 division C Science Olympiad. It should be fully rules complaint but check dimensions before using this design.
The Clunky Clock is designed to use parts I have on hand to make a low friction pendulum clock. The 2x4 attachment allow the design to be attached to a simple 2x4 stand. This is not designed to be fancy in any way, it's designed to be functional.
Pro Tip: if you use any pendulum clock in the It's about Time event, make sure you can and do start the pendulum in the same place every run.
Note: At time of upload, the design has not been tested in competition and has no guarantee of performance.
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Printed Parts needed:
1x Penny Holder
1x Arrow
1x Bearing Block
1x 2x4 Attachment
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Hardware Needed:
1x 623-2rs Bearing http://www.amazon.com/Bearing-623-2RS-3x10-Sealed-3x10x4/dp/B002BBMG3A
2x M3 Screws (I used M3x16) http://www.amazon.com/16mm-Socket-Machine-Screw-Black/dp/B00W97MTII
~20x M3 Nuts http://www.amazon.com/gp/product/B000NBIH92/
4x M3 12mm Bolts: http://www.amazon.com/Makerbeam-Bolts-Square-Head-25pcs/dp/B00OXR1X5C
8x M3 6mm Bolts:
http://www.amazon.com/MakerBeam-bolts-square-head-pack/dp/B00G2DNW3G/
or
http://www.amazon.com/MakerBeam-bolts-wing-type-head/dp/B00G2DNWK4/
1x 300mm Makerbeam (you can use any length that you wish, but different lengths will have a different period) http://www.amazon.com/MakerBeam-300mm-beam-black-anodised/dp/B00G2DNU4M
1x 150mm Makerbeam (you can use any size you wish, this is just used to attach the pendulum to the 2x4 base) http://www.amazon.com/MakerBeam-150mm-beam-black-anodised/dp/B00G2DNT4I
United States Pennies (as many as you want or need)
cordovalabs
