During the Song Dynasty, which outcome from cast iron cannons resulted if impurities raised the explosive burn rate of gunpowder propellant?

💡 Explanation

A rapid burn rate increases stresses because the driving pressure rises faster than the cannon material response limiting barrel expansion; therefore, the muzzle velocity increases rather than pressure stabilizing because the deflagration turns progressively to unwanted detonation.

• Within ancient Roman fortifications, which consequence arises from excessive mortar thermal expansion?
• Which outcome occurs when astronomical data is misaligned within a brass medieval astrolabe?
• Which outcome resulted from ancient terracing during heavy rainfall?
• When a historically used sextant aboard a ship experiences thermal expansion due external factors, which outcome most probably reduced navigation accuracy?
• Which outcome arises from thermal expansion mismatch within mosaic pietra dura inlay?
• Which consequence arises due to inconsistencies when casting early Chinese cast iron?