Old Fella and 411a
It is my understanding that the L-1011 design with the center engine on fuselage centerline with an S-duct required a short engine, hence the three spool RB 211. That precluded either the JT-9D or the GE CF-6, which were installed on the other wide-bodies. True or not?
GF
It is not a coincidence that the longest of the three engines is installed in the rudder on the DC-10. Sorry, 11Fan.