The design is finalized (for now). At less than 3 seconds of error in a week, it is potentially one of the most accurate Lego clocks, showing the potential of grasshopper escapement (with little extra help from magnets)

References:

Knife edge suspension by KEvronista:
   • yet another Lego pendulum knife edge.  

Two-wheel grasshopper escapement:
   • Twin wheel grasshopper, second variant  

Chronobrick-1 by Kei Abe:
   • A prototype of an accurate LEGO pendu...  

My paper on using magnets to alter the clock rate:
https://drive.google.com/file/d/1I6j1...

#clock #lego #engineering