From: firstname.lastname@example.org (Shahid Siddiqi) Organization: NASA Langley Research Center, Hampton VA, USA Date: 06 Oct 93 03:50:47 PDT References: 1 2 3
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The fuel efficiency of airplanes like the 747 & 757 is quite good if all the seats are full e.g. the 747-400 can deliver 80 seat miles per gallon and improve this to 90 if high density seating is used. The 757 gives around 60 or so. Intrestingly some of the experiomental general aviation kit planes also give high values. The Cirrus by virtue of its laminar flow wing & emmpenage gives 60 seat miles per gal while the Glasair II and Lancair will give about 50. The US passenger traffic annually is about 500 million passengers emplaned. Divide by the total gas consumed by all the airlines (which I don't know) gives you a figure. Incidently does anyone know how they count passengers? Do you get double counted going through a hub e.g. fly from Washington to LA via Ohare do you get counted twice because you changed planes at Ohare.