Turbine engines are much lighter in weight and have 15,000
to 75,000 eshp in thrust, jumbo airliners and freighter are
only possible with the jet.


I tend to agree with you but -
http://www.globalaircraft.org/planes...bemaster_ii.pl

To get the size they are now you are correct, but the turbine engine
wasn't invented to build large aircraft. I think it was kerosene for
$.08 when they were paying $.15 for 140 octane and greatly reduced
maintenance costs that caused the airlines to park their DC-7s and
Connie's. Cost of operation drives everything in the airlines.

Cheers