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Another technology that never progressed to the series production was the Tu-156
In Flight International 23-29 May 1990 we can read:
"Aeroflot is "sure" to buy the Tu-156 airliner (a derivative of the experimental Tu-155 shown at Hannover airshow. Tupolev is manufacturing the first of 5 prototypes to be completed by 1995. The NK-89 engines will burn methane initially, but later aircraft might use hydrogen."
April 2006...still burning fossil fuel at 75$/barrel. Brilliant!![Eek! :eek: :eek:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
In Flight International 23-29 May 1990 we can read:
"Aeroflot is "sure" to buy the Tu-156 airliner (a derivative of the experimental Tu-155 shown at Hannover airshow. Tupolev is manufacturing the first of 5 prototypes to be completed by 1995. The NK-89 engines will burn methane initially, but later aircraft might use hydrogen."
April 2006...still burning fossil fuel at 75$/barrel. Brilliant!