NR class (Southern Cross) (We need this one for the current Australia-Day achievement) The NR class are a class of diesel locomotive built by A Goninan & Co for National Rail between 1996 and 1998. The NR Class introduced many new features. These were the first locomotives in Australia to have variable horsepower, which meant that the power output of the engine had three different settings, making the NR class the most fuel-efficient locomotives in Australia. They have GE 7FDL-16 engines, with power levels of 2 850 HP, 3 560 HP or 4 020 HP, mass of 132 t, a Co-Co wheel arrangement and a maximum speed of 115 km/h. In fact the variable horsepower feature (so-called) was little more than a talking point (selling point?) and something of a furphy as far as being a valid feature went. Rather than going through the complicated process on the cab DID panel to configure the locomotive for a particular variable power configuration, precisely the same outcomes could be achieved simply by the driver voluntarily limiting operation to throttle positions 7 (to produce 3 560 HP operation) or 6 (for 2 850 HP operation).
Posted on: Sun, 26 Jan 2014 17:11:55 +0000
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