M636COne thing I meant to say in my post in the other thread was that I understood that GE appear to have paid for the engine change from HDL-16 to GEVO-16 or at least provided the replacement engines at no cost to the operator.
And this would likely have involved 'not inconsiderable' cost, as these engines have cast crankcases and many 16-cylinder parts will be different from their 12-cylinder counterparts.
My suspicion is that this was handled as a warranty issue, at least in part because GE would go blind keeping the HDLs running properly. I had not thought about the installation and calibration expense not being compensated as part of the warranty coverage; I'd assumed that some fair number would have been agreed whether or not GE did the shop work.
One thing I meant to say in my post in the other thread was that I understood that GE appear to have paid for the engine change from HDL-16 to Gevo-16 or at least provided the replacement engines at no cost to the operator. At least, this was the understanding I gained regarding the BHP Billiton units.
Peter
BaltACDMy understanding is that the derating was done through software changes - nothing mechanical.
I believe most of it was done by changing the parameters of the electronic fuel injection, comparable to rack changes in an older engine, and it could have been 'mapped' to give relatively larger 'economy' gains at different notch ranges -- the conservation not having to be 'linear' across governor range as it would be with a rack setting. I presume that some of the derating might have been in places like peak alternator excitation, or reduction of excitation during compression, but someone involved with derating programming will have to provide the strategies and methods they used. This might make an interesting Trains article or column subject...
There does not appear to have been any attempt to implement 'cylinder interruption' on these engines.
southernalcoDid CSX derate them to 4600 HP ?
My understanding is that the derating was done through software changes - nothing mechanical.
Never too old to have a happy childhood!
southernalcoDid CSX derate them to 4600 HP?
Yes, but they retained their 'replacement' 16-cylinder GEVO engines, and I am waiting for definitive proof WNY&P has re-rated at least some of them to the 'original' 5800hp.
Did CSX derate them to 4600 HP ?
Apparently eight: six to run, and two as 'parts units'.
How many of these units did WNY&P buy?
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