>1) Many 707-100s were reengined from JT3Cs to JT3Ds. I think some 720s >were also reengined in the same way. True, though I did say "where jetliners underwent a major re-enginging not for efficiency but simply for convenience" -- those 707 reenginings were clearly upgrades, not lateral moves like the Atlas 747s. (Let's not quibble about the fact that swapping a JT9D for a CF6-80 might well constitute an upgrade!) >2) A VC-10 had a RB.211 installed on the port side for flight test >development. How could I forget that one! Quite distinctive. Again, I was looking for oddball, lateral moves, not flight test aircraft, which are common enough examples of weird engine mountings. As long as you brought the subject up, there's also the aft-mounted JT8D on the 367-80, simulating the 727. I didn't see that in your impressive list. -- Karl Swartz |Home kls@chicago.com http://www.chicago.com/~kls/ |Work kls@netapp.com http://www.netapp.com/ "The average dog is a nicer person than the average person." - Andrew A. Rooney