asteroza + aviation + ultrafan   3

text_2010_06_24_EngineDesign.pdf (application/pdf Object)
I hate to sound dumb, but why hasn't a contrarotating power turbine set been joined to a twin contrarotating geared turbofan setup in a puller configuration? Is it the cost of the gearing and potentially 3 or even 4 shaft setup to make that possible, compared to a simpler free power turbine direct driving the rotors in a pusher configuration? But a puller config allows putting in a recuperator, something a pusher configuration would have trouble with.
rolls-royce  ultrafan  turbofan  engine  aviation  propulsion  aerospace  research  technology  open  rotor  propfan  Delicious 
august 2012 by asteroza

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