• The World's First Scheduled Airline
• The Post Office Begins Flying the Mail
• The Curtiss JN-4D Jenny
• Regularly Scheduled Air Mail Service Begins
• Air Mail Service Takes Root
• Flying the Mail at Night
• A Daring Demonstration
• How Did Air Mail Pilots Find Their Way?
  • Wild Bill
  • What Was It Like To Fly?
• Early Airlines
  • Who Flew?
• Early Aircraft Technology
  • Engine Technology: Water-Cooled Engines
• Airlines Take Over Carrying the Mail

Wind Tunnel

NACA's Langley Memorial Laboratory opened in 1917 with the first pressurized (variable density) wind tunnel.

Image number 9A03115
Credit: National Air and Space Museum Archives

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