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The primary benefits of Retractable Landing Gear are increased climb performance and higher cruise airspeeds due to reduced drag with retracted gear. This type of gear may be retracted mechanically, electrically, hydraulically, or some combination of the three. A common landing gear system is electrically ACTIVATED and hydraulically ACTUATED. Basically, a small lever sends an electrical message to the system, where hydraulics do the heavy lifting to move the gear up or down. Some airplanes are e

Understanding Convexity