Which risk increased when Roman siege engines used torsion springs made from poorly seasoned wood?

💡 Explanation

When torsion springs of siege engines like ballistae were made from poorly seasoned (green) wood, arm fracturing at launch increased because the wood's higher moisture content and lower strength decreased force resistance. Therefore arm fractures were more likely rather than deviation, slippage, or frame collapse which involve distinct failure modes related to projectile balance rope tightness etc.

• Which mechanism explains the reduced hull displacement experienced during 18th-century ship construction from green timber?
• Which outcome improved agricultural yields when pre-Columbian civilizations implemented chinampa construction?
• Which navigational error increases when a sextant mirror distorts the horizon line during twilight observations?
• Which mechanism allowed Alhazen to accurately describe light refraction in the 11th century?
• Which outcome arises when pre-Columbian chinampa farmers introduce excessive organic matter for maize cultivation?
• Which structural failure mode most threatens masonry arch bridges during seismic activity?