Which material property improvement enabled ancient Chinese gunpowder rockets to achieve greater range?

💡 Explanation

Greater rocket range stems from higher motor pressures. The use of cast iron tubes enabled the **tensile strength increase**, because cast iron resists the hoop stress that can rupture weaker materials, therefore containment improves pressure, rather than alternative factors related to propellant or aerodynamics.

• Which quenching consequence appeared when ancient Chinese iron casters attempted rapid weaponry production?
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• Which constraint limited the dimensional scale of early Mesopotamian cast bronze statues?
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• Which optical effect complicated early telescopic observations of planetary positions by medieval astronomers?