DuB-EnG: Modern Gravity Harmonograph at the Midlands Model Engineering Exhibition 2018 The Orbitron

The inertia created by swinging the heavy glass balls on this Harmonograph causes the pen to draw the most incredible intricate patterns! Show and tell at the Midlands Model Engineering Exhibition... Thanks kindly to: Meridienne Exhibitions Ltd Leading Exhibitions for Modellers and Hobbyists The Fosse, Fosse Way, Radford Semele W: