I was working on an Alco yesterday and this question came up: Why didn't GE build the U-boats with their own 17MG8 governors? Every U-boat or later GE I've seen or have seen schematics of show them with Woodwards.
Were the 17MG8s more expensive? Problems loading up at different speeds in a mixed consist? Were the 17MG8s more difficult and expensive to maintain, and not well liked the mechanical forces? Did GE just decide that the railroads would like to standardize on Woodwards?
The 17MG8 needed five relays to run, one for each throttle wire, and one safety relay (SR), held in by the reference voltage. There was also a separate engine control panel (ECP) that contained the resistors, caps and diodes needed to make the system work. Perhaps these items took up too much space and cost too much? There is a lot of wiring involved (been there, done that, etc.). Simplification?
I know it wasn't a matter of the GE governors being incompatible with the Type E excitation systems. The RS-36 of 1962 had Type E and a 17MG8; I'm not 100% sure about the governor on the slightly earlier RS-32, but excitation was said to be Type E. The Centuries were offered with either governor, and were definitely equipped with Type E excitation. A tach gen provided the engine speed reference, which would have come from the exciter on either amplidyne or static.
Lots of questions above, but hopefully this offers some food for thought. I also might have answered my own question, by listing all the possible cons, but I wonder if anyone else has had the same question and done any research. It does seem funny that GE didn't use their own governor, though.
I'm not saying anything bad about Woodward governors, BTW. They work well, but the 17MG8s do let a unit load up quicker, useful when switching.
Were the 17MG8s more expensive? Problems loading up at different speeds in a mixed consist? Were the 17MG8s more difficult and expensive to maintain, and not well liked the mechanical forces? Did GE just decide that the railroads would like to standardize on Woodwards?
The 17MG8 needed five relays to run, one for each throttle wire, and one safety relay (SR), held in by the reference voltage. There was also a separate engine control panel (ECP) that contained the resistors, caps and diodes needed to make the system work. Perhaps these items took up too much space and cost too much? There is a lot of wiring involved (been there, done that, etc.). Simplification?
I know it wasn't a matter of the GE governors being incompatible with the Type E excitation systems. The RS-36 of 1962 had Type E and a 17MG8; I'm not 100% sure about the governor on the slightly earlier RS-32, but excitation was said to be Type E. The Centuries were offered with either governor, and were definitely equipped with Type E excitation. A tach gen provided the engine speed reference, which would have come from the exciter on either amplidyne or static.
Lots of questions above, but hopefully this offers some food for thought. I also might have answered my own question, by listing all the possible cons, but I wonder if anyone else has had the same question and done any research. It does seem funny that GE didn't use their own governor, though.
I'm not saying anything bad about Woodward governors, BTW. They work well, but the 17MG8s do let a unit load up quicker, useful when switching.