Which outcome increased reload failure rates of early Chinese repeating crossbows due to brittle components?

💡 Explanation

Small parts like the "sear" require higher precision manufacturing. Casting weaknesses initiated tiny pre-existing cracks—stress concentrated upon release using torsion spring induced further quick fracture because such iron is often brittle and subject to crack instability; rather than bending into place/flexibility under impact.

• Which mechanism contributed to ziggurat settlement instability when built on clay plains?
• Which outcome improves after terrace farming reduces soil erosion on steep Andean slopes?
• Which consequence occurs when the degree scale alignment on an historical astrolabe suffers warping?
• Which risk increased during Mughal pietra dura inlay when less skilled artisans substituted materials?
• What vulnerability of pre-1000 AD Byzantine triremes significantly affected Greek Fire's impact during naval sieges?
• When sighting a distant object by alidade alignment, which limitation increases with humidity on astrolabes?