National Geographic : 1955 Aug
"Mickey Mouse Ears" + Deaden Jet Noise Aboard a Carrier One jet engine with after burner-a tailpipe device for added power-equals the com bined sound of a thousand 75-piece orchestras. To lessen the earsplitting racket, military men working near jets wear earplugs and experimental helmets like these. Aboard the carrier Midway this landing signal officer and assistant guide a plane to deck. Muffs filter out high-frequency noise but permit conversa tion to be heard. +Flaming ram jets on rotor tips power this Hiller Hornet in a night flight, creating in time exposure a weird pattern of light as the helicopter de scends. +Dazzling peach-colored flame roars from an F-100's afterburner at Edwards Air Force Base, California. Kodachromes by Luis Marden, National Geographic Staff 264 O National Geographic Society + A Man-made Thunderclap Is Born Simulating flight at supersonic speed in a wind tunnel, an F-100 model generates a series of shock waves. Similar waves from low-fly ing jets have created powerful sonic booms that shattered windows and damaged chim neys. Higher flight paths are solving this problem. Ektachrome by North American Aviation, Inc.