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Amelia Earhart’s Final Flight

Earhart took guidance on the Electra from design legend Kelly Johnson. Everett Collection
Gemini Sparkle

Key Takeaways:

  • A 1999 Caltech study suggests Amelia Earhart's plane had a significantly shorter fuel duration (20-21 hours vs. 24 commonly assumed) due to factors like tropical temperatures reducing fuel density and the effect of altitude on consumption.
  • A persistent 26 mph headwind further exacerbated fuel consumption, increasing the effective flight distance to nearly 3,100 miles, making the trip much riskier than planned.
  • Compounded by navigational difficulties, problematic radio communication, and the tiny, low-lying nature of Howland Island, these factors indicate Earhart and Noonan simply ran out of fuel near their target and were lost in the Pacific.
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Three-quarters of the globe behind them, Amelia Earhart and her navigator, Fred Noonan, now had only the Pacific Ocean left to cross. They took off midmorning from Lae, Papua New Guinea, on July 1, 1937, bound for Howland Island, an 8,200-foot-long, paramecium-shaped speck halfway to Honolulu. A runway had been carved out on the uninhabited island for their use. Fuel awaited them, and the US Coast Guard cutter Itasca stood by with radio-direction-finding equipment. Earhart would navigate by pilotage and dead reckoning until nightfall; they would then rely on Noonan’s celestial navigation until the sun rose an hour before their anticipated arrival. Thereafter, Earhart would dead-reckon again.

Peter Garrison

Peter Garrison taught himself to use a slide rule and tin snips, built an airplane in his backyard, and flew it to Japan. He began contributing to FLYING in 1968, and he continues to share his columns, ""Technicalities"" and ""Aftermath,"" with FLYING readers.

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