az | PRIVACY ACT MATERIAL REMOVED on "X" day. When studying these two charts it mst be borne in mind that there are five distinct missions being performed by the aircraft. The mission of collecting air samples from the atomic cloud, plus the collection of blast date, is accomplished by the drone aircraft. Aerial photography for scientific and documentary coverage is performed by the photographic aircraft. The mission of collecting meteorological data and tracking the atomic cloud is performed by the weather aircraft. The collection of certain scientific data after the blast is accomplished by the helicopters. Air Rescue Service is provided by both Army. and Navy Aircraft. During the operations on "X" day, all air operations proceeded on schedule with three exceptions. Thepilot of Imitation Two, a weather aircraft, noticed a sudden drop in the oil pressure on No. which prompted him to decide to feather the propeller. engine However, before: this feathering could be accomplished,the propeller ran away, the engine froze, but the propeller "windmilled". Excessive vibration occurred, and the generation of extreme heat was evidenced by the white hot. appearance of the nose section of the engine. Finally the propeller fell free and visual evidence of heat disappeared. With the danger of fire no longer existant and control of the air- craft assured, General iy» than directed the aircraft to return to Kwajalein. The second exception to the planned operations was the loss of the drone aircraft operating at 14,000 feet. Section VIII At just two minutes before 65 PRIVACY ACT MATERIAL REMOVED

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