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I've heard recently from aircraft engineers that airliners could be operated more economically if refuelled in flight or even flying in formation.
Today, I've found an article about airliner refuelling with conceptual designs from 1949. Here's the link:
http://www.flightglobal.com/pdfarchive/view/1949/1949%20-%200167.html
Today, I've found an article about airliner refuelling with conceptual designs from 1949. Here's the link:
http://www.flightglobal.com/pdfarchive/view/1949/1949%20-%200167.html