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[USER=1642]@Zootycoon[/USER] : I now understand the central engine placement that you criticized according to the experience with the 727: I see the bumb created by the larger forward fuselage section (cabin) creating a recompression zone in front of the engine inlet. Something that the 727 didn't have with a constant fuselage section and an inlet raised to avoid ingesting the boundary layer.In the high alpha low speed regime the canted engine axis offset the low efficiency due to turbulent air injection. Since they have a third engine to reduce noise during those phases only, the accepted lower efficiency makes sense.My 2 cents only.
[USER=1642]@Zootycoon[/USER] : I now understand the central engine placement that you criticized according to the experience with the 727:
I see the bumb created by the larger forward fuselage section (cabin) creating a recompression zone in front of the engine inlet. Something that the 727 didn't have with a constant fuselage section and an inlet raised to avoid ingesting the boundary layer.
In the high alpha low speed regime the canted engine axis offset the low efficiency due to turbulent air injection. Since they have a third engine to reduce noise during those phases only, the accepted lower efficiency makes sense.
My 2 cents only.
