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[quote]QUOTE: Originally posted by oltmannd This is an interesting thread which raises a few questions. Is inverter technology still evolving/improving? Are the high power GTOs getting any better? Is the control system improving/evolving as microprocessor technology improves? [/quote] Inverter technology has kept evolving, especially in Europe, where almost all new locos (except for EMDs) are AC powered. Current locomotives have better (and faster) microprocessors, water or air cooling (instead of boiling refrigerant cooling), and IGBTs instead og GTOs (lower power losses). But the point is still this one: will a 6,000 hp locomotive ever be as reliable as two 3,000 hp locos? When Boeing developed the 777, very reliable turbines had to be developed in order to use just two big (instead of the four smaller turbines from the 747). The odd thing is that one of the available engines for the 777 is made by ... GE!!
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