by _o_OOOO_oo-Kanawha » Sun Aug 26, 2012 12:40 pm
Are these engines really that quiet in prototype? Both the stock and your Dash 9/ES44 are quiet engines compared to the SD40-2.
I have never been near one, let alone inside the cab. The few modern Diesels I encounter here in the Netherlands are all quiet also, sealed engine compartment, exhaust silencers, moiseless radiator fans, etc. etc. You can hear the AC traction quite clearly over the noise of the prime mover. However, since the average US Diesel is about 4000 HP, or more than twice as powerful as the standard here, I expect them to be louder.
One thing I did notice with most modern Diesels is that it is the midrange to higher end of their audio spectrum that is silenced. When accelerating away, or passing by under full power, one can almost feel the low frequencies rumble your stomach. Damping low frequencies is considerably more difficult using sheet steel hoods, doors etc.
I suppose modern US Diesels must meet some EPA standard, right?
Do the Dash-9 and ES series make the same sound and noises or are they dependent on number of cylinders, etc.?
I think you provided us with a good engine sound pack, it sounds quite good with the lone powered Dash 9 struggling uphill on the way to Ooltewah in NSAND's Dalton Delivery scenario. You didn't change the dynamic brake fans sound, did you? RSC also forgot the fact that the prime mover needs to rev up to provide dynamic braking power.
When setting myself on the ground using the 4 key one can hear the sound change quite dramatically as the engine appraches, roars by and passes to the next vantage point.
Edwin "Kanawha"
The Chessie, the train that never was ... (6000 hp Baldwin-Westinghouse steam turbine electric)