FRANKENCOPTER

摘要

IT'S SO BONKERS YOU WOULD THINK THE INSPIRA- tion came from a kid's drawing. Two giant rotors, spinning inside each other's plane. An intermesh-ing rotor system, or synchropter, operates on the assumption that two main rotors are better than one. It turns out to generally be true. One of a helicopter's biggest inherent drawbacks is that power for lifting must be siphoned off to a tail rotor to counteract torque. Designs with two main counterrotating rotors can use more of the power for lifting, making the most efficient use of engine power.