3 ms·
Torsion springs are another option. https://en.wikipedia.org/wiki/Torsion_siege_engine https://en.wikipedia.org/wiki/Torsion_siege_engine
by mcguire 5y ago
Torsion springs are another option.
https://en.wikipedia.org/wiki/Torsion_siege_engine https://en.wikipedia.org/wiki/Torsion_siege_engine