Which mechanism initially hampered early attempts at powered heavier-than-air flight by inventors such as Otto Lilienthal?

💡 Explanation

Early powered flight was hampered by an insufficient understanding of airfoil lift because early calculations overestimated the required wing area, leading to designs that were too heavy and inefficient. Therefore insufficient airfoil lift knowledge stalled development, rather than lightweight engine problems, control surfaces or wing warp issues that were addressed later.

• Which factor most accelerated the Romans' transition from manipular legions to cohort legions, affecting weapon effectiveness?
• Which risk accelerated the degradation of early Mesopotamian bronze tools used in irrigation canal construction?
• Which factor most limited the accuracy of calculating time or celestial positions using medieval astrolabes?
• Which structural consequence occurs when defensive walls experience differential soil settlement over time?
• Which consequence results when a quadratic celestial position equation within an astrolabe calculation yields imaginary roots?
• Which structural failure mode risks early Roman concrete domes if exposed to continuous water infiltration?