>> All the present day locomotives you are refering to - DC operated
>> Diesel Electrics - trace their ancestry back to I/C
>> generator/traction motor locomotives developed in Sweden around
>> 1913. Those were railcars, self powered passenger carriages, but
>> intended to pull mixed trains on mainlines.
> Very light weight trains.
Yes, these railcars were only intended for lightweight trains. But
consider the two diesel loco types built by Burmeister & Wain and Frichs
respectively for the Danish State Railway in 1929. These were mainline
units, and were used to haul decent-sized trains.
Looking further afield, in 1931 the Royal State Railway of Siam bought 6
A1A-A1A locos built by the consortium Sulzer/Oerlikon/Henschel.
These were mainline power, and at least two were still in service in
1977. Frichs built 7 locos for the RSR in the same year - 6 were 2-Do-2
units, and the seventh an articulated 2-Do+Do-2. The 2-Do-2s were
flogged during WW2, and were withdawn during the mid 50s. The 2-Do+Do-2
remained in service until 1964.
Even further away, the Buenos Aires Great Southern Railway in Argentina
had a number of mainline diesel locomotives in service from the 1930s
onwards, most of which were very successful and had long careers. There
are other examples, but these will serve to make the point that by the
time the RS-1 was delivered, viable mainline diesels were already a reality.
> This is why I used the term "diesel designed as a general purpose
> locomotive for whatever you wanted to move with it". It was designed
> to be a general purpuse do-anything generic locomotive.
Indeed, they were. But so were all the examples quoted above, all of
which predated the RS-1 by at least a decade.
> The Swedish locomotives did not cause a revolution in the way
> railroads did business.
Arguable. Their influence was quote apparent in the Scandinavian
countries, as well as the rest of the world. I'd make the point that in
Europe, the diesel had stiff competition from electrification, which was
already a well-proven and widespread technology.
> Almost the entire first production run of the ALCO RS-1 was grabbed
> up and sent to Iran in order to feed Russia during World War II.
> Thus, not only did the RS-1 change the way the USA thought about
I'd regard the RS-1s on the Trans-Iranian as a special case. I reckon
the diesels already in service on US railroads during WW2 had the
greatest influence on the way the USA thought about diesels.