Actually, the DC-10 has it's engine in the tail (vertical stabilizer), while the L-1011 has it's engine in the tail cone. the round opening that you see on the L-1011 is nothing more than an airscoop to feed the engine. On the DC-10, however, the engine itself is seperated from the fuselage and mounted part way up the tail. I don't know what flying tail refers to, I just wanted to clear that up. BTW, the DC-10 looks better.