USAF MC-130J #11-5729 waits for its next mission as another C-130 lifts off above it at Eglin AFB. The test aircraft has been fitted with vertical fins on each wing, called winglets. The 413th FLTS aircrew and engineers tested the modified aircraft over eight flights. The goal of the tests was to collect data on possible fuel efficiency improvements and performance with the winglets and lift distribution control system installed. [USAF photo by Samuel King Jr.]
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