[quote=chornedsnorkack]Where can a plane have a middle engine?
Let's get down to earth here and back to the question! Jets aren't everything.
The Ford trimotor had one on the nose, as did the main German communication aircraft of about the WWII era....was it a Heinkel?
Now, in the 21st century, to get ourselves right up to date, we have the Trislander in service with one mounted a little way up the fin leading edge.
I vaguely recall a turboprop on the nose of an experimental DC3 conversion, along with replacing its radial pistons with turboprops (PT6-??, I think).
Surely these, with the L1011/DC10 etc installations mentioned so far, just about cover the available options? Or did anyone ever put one on a pylon on the centre-line above the fuselage (as per the Lake amphibian, although that was the only engine on that lovely airplane)?