A not great demo of closed loop pulse propulsion in html.
https://gemini.google.com/share/ce9be777cf69 Closed Loop Pulse Propulsion Simulation Closed Loop Pulse Propulsion Engine System COM (Strictly 0,0) Platform Center System 1 (Bottom Edge) System 2 (Top Edge) System Parameters Platform Mass (M) 100 Ball Mass (m) [x2] 10 Launch Speed (v₀) 10 m/s Required Wrap Count 1 ...