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Turbo train in Japan
  Background for the birth
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Gas turbine advancement
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   Challenge to diesels
Trends of turbo trains
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 Performance of turbo train
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 Effects of 4 speed transmission
  JetTrain simulation
  JetTrain 300 km/h operation
  EMU versus Turbo train

Can JetTrain run at the speed of 300 km/h?

Bombardier JetTrain was designed at the maximum cruising speed of 240 km/h. This is the innovative speed in the field of non-electrified lines but currently electric train's standard cruising speed is 300 km/h. Can the JetTrain technology enable 300 km/h operation in non-electrified lines?
The diesel technology is still hard to realize this due to the heavy and bulky engine. The practical speed of the diesel technology seems to be up to 250 km/h but the high accelerating performance cannot be expected. To evaluate this issue, create the JetTrainlike turbine locomotive and simulate. Notch man mini can simulate this very easily. Simply changing the maximum designed speed, the reduction gear ratio is properly set.
jettrain 300km/h

The next is the performance curve of the created train.Performance curve of the 300km/h

The train can barely achieve the speed of 300 km/h but its acceleration force at the high speed range is not sufficient.
The next is the running curve of both trains.

The train can achieve the cruising speed of 300 km/h. The traveling time is shortened by a few minutes.

If the stopping station is reduced to 2, the traveling time is shortened and 300 km/h operation becomes more effective.

If more lighter passenger cars popular in Japan or Europe are available, the train performance will be improved and the fuel consumption will decrease.
If the weight of loaded car is set to 45 tons, 15 tons lighter than that of the JetTrain hauling car, how much will the performance be  improved?
The next is the simulation and the performance curve.
lighter weight jettrain passenger car performance
The red line is the train hauling 45 tons passenger cars and the yellow is 60 tons. At the speed of 300 km/h, about twice accelerating performance can be achieved.
The next is the traveling time table of stopping all stations.
JetTrain like trains stopping all stations
About 9 minutes shortening is achieved. The fuel consumption is also improved and reduced as shown below.

Consist fuel consumption
Normal 3484.85 kg
light weight 3065.23 kg
About 15% fuel saving is achieved.

The next is the running curve of trains stopping at 2 intermediate stations.

The improvement of the balancing speed and the accelerating performance is well illustrated.
The next is the traveling time table.

The fuel consumption is also improved.
Consist fuel consumption
Normal 2550.91 kg
light weight
2274.54 kg

If the advanced recuperated gas turbine like Mercury 50 is mounted, can the performance be improved more?
To simulate this, design the locomotive equipped with 4600 KW recuperated gas turbine.

The created locomotive weighs 114.6 tons. The performance is shown below.

Mercury 50 gas turbine locomotive performance curveMercury 50 gas turbine locomotive running

The traveling time is shortened only by about three minutes.
But the fuel consumption is remarkably reduced.

Consist fuel consumption
Mercury 50like 2399.80 kg
ST40like 3065.23 kg

In the real world, the thermal efficiency of Mercury 50 element is 40% or more (the total electric efficiency of generator set is 39%). The efficiency of the engine element simulated above is calculated as 37.5%.
Such a locomotive had been proposed by RailPower as a CINGL for freight hauling in the past but not realized.

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