how fast can a go train go?

Answer 1

That depends on the Maximum Authorized Speed for the track AND equipment you are using...

Answer 2

As fast as its own limitations will allow.

ACE, above has given a very good answer. On US freight common carriers the speed at which a train is permitted to operate is not a constant. Many factors have to be computed to arrive at the maximum authorized speed.

Crazy Delmar has the right idea, but is only slightly off. Most freight locomotives are geared at a ratio of 62:15, allowing for operation at a maximum of 72 MPH, without creating problems with the traction motors. Passenger engines are geared higher and can lope along at 79 MPH (or more, provided the signalling allows).

Of course there are conventional passenger trains with higher speeds, as well as those designed for very high speeds. But the above information is applicable to your everyday dirty old drag or the pigs and other hot shots.

Answer 3

Actually, the TGV train in France holds the distinction of being the world's fastest train. It has hit 515 kpm (about 320 mph), but usually runs at 300 kph (186 mph) in normal service.
The Maglev (magnetic levitation) train in Shanghai, between the airport and downtown, will hit about 435 kph (270 mph) in normal service.
So, the answer to your question depends on your definition of "fastest". For top speed, the TGV is the fastest. For normal service, the Maglev is the fastest.

Answer 4

Your average North American diesel-electric locomotive is geared for 65 MPH.

Answer 5

BULLIT TRAINS IN JAPAN GOES UP TO 470KM/H

Answer 6

http://www.railwaygazette.com/Articles/2005/11/01/1222/2005+World+Speed+Survey+tables.html

http://www.h2.dion.ne.jp/~dajf/byunbyun/speeds/world.htm