Graphical labs · Discrete lab (diagnostics on screen)
Double pendulum
Lagrangian chaos, energy check
Lagrangian double pendulum (massless rods) · RK4 · angles from downward vertical
- θ₁
- 2.20000
- θ₂
- 2.50000
- E
- 19.4056
- ΔE/E₀
- 0
Finite-difference / Monte Carlo / RK scheme at teaching resolution. Conserved quantities are diagnostics. FrameCalc is an educational workbench. It is not for medical, nuclear-safety, radiation-protection, or engineering sign-off. Fusion and IEC estimates are models, not device predictions. Accuracy · Legal