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What is a turbotrain?
What is a gas turbine?
   Merit demerit
   Torque details
__More power!
__More speed!
__Miracle in non-electrified line
__ Oil crisis
Turbo train in Japan
  Background for the birth
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  Revealed problems
Gas turbine advancement
  Facts M1 Abrams revealed
  Second generation of turbines
   Challenge to diesels
Trends of turbo trains
  ALPS project
  Low emission locomotive
 Performance of turbo train
 Is M1 power pack available?
 Effects of 4 speed transmission
  JetTrain simulation
  JetTrain 300 km/h operation
  EMU versus Turbo train


Why destroyed ?


Oil crisis 

In October 1973, members of OPEC proclaimed an oil embargo and it lasted until March 1974. This event is known as 1973 oil crisis and oil prices rose steeply. In such a circumstance, gas turbines were began to be avoided due to their high fuel consumption and high speed rail projects using turbine powered train were all reconsidered.

Advancement in electric drive

 Many advancement were achieved in the field of power electronics which enabled adjustable voltage, adjustable frequency control method. And also advanced technology was established for providing with electricity from an overhead wire. These technologies enabled high speed trains over 300km/h cruising speed with high efficiency.







Delay of the turbine technology revolution

In those days, turbines were thought to be the most revolutionary technology among internal combustion engines. But the revolution was not become real. High temperature, high flexural strength ceramics were hoped for, but could not be produced in commercial scale and price. High efficient gas turbines were dreams of car industries but could not be realized.

Progress in diesel technology

The diesel technology was advanced slowly but steadily. High volume and mass problems of this engine were gradually reduced. Originally fuel consumption of diesel was low and modern direct injection and electronic technologies improved its efficiency more. Thus, diesels had become the only power source in non-electrified lines and extended their area of activity to a semi-high speed rail. Intercity 125 (HST) was the first non-electrified 200km/h commercial service started in Britain in 1976. 

Thus, any high speed rail was planned upon assumptions that the high speed train's power source was electricity and middle speed diesel.