Talk to a RailFan - you will learn a LOT about Trains.

By the look and feel of it, we can call the GE's 101 as Beasts. In pictures is 3rd Gen GTEL, UP-x18 kept at Illinois Railway Museum which I captured over the weekend. The 3rd pic resembles Gulliver & Lilliput. :). The Lilliput trying to gain control over Gulliver.
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These were Gas Turbine Electric Locomotives (GTEL) which were made and released to market by GE from 1948, and sold in ALCO-GE Partnership in their early days, though consumed more fuel, they used less expensive Bunker C heavy Fuel Oil, instead of Diesel....
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But due to the nature of the oil, more modifications were required in the engineering of this engines to propel the turbines, which included a heating system to heat the oil to 93C, Change of oil to Modified No.6 Heavy fuel oil, Changes to air intake systems of the turbine, etc.
GTELs have three generations.
These guys were mostly used for long haul freight trains in USA.
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Union Pacific(UP) operated the largest fleat of GTELs. During their peak, UP used GTELs to haul 10% of their freight traffic.
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UP started retiring them in 1969 due to the increasing maintenance costs and finally retired the 3rd Gen GTELs numbered X18 & X40 in early 1970.
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Stats:
Maximum speed 65 mph (105 km/h) (according to GE tests).
Power output 4,500 hp (3,400 kW) 1st. & 2nd. Generation
8,500 hp (6,300 kW) 3rd. Generation
The world's first fastest TGV's prototype was based on Turbine Technology only