开云体育Allan,The exhaust steam pipe from the rear unit on the NGG16s has only ever been on the driver’s (right hand) side of the locos. The two pipes on the fireman’s (left hand side) of the locos are the vacuum pipe for the train and loco brakes, and the water balance pipe between the tanks on the front and rear units. The vacuum pipe runs from just behind the smoke box to below the cab. The water pipe runs from the front of the boiler cradle to the rear and is connected to a casting (the lump on the boiler cradle frame by the firebox front) that has the water feeds to the injectors taken from it. So far as I am aware the pipe runs on the boiler cradles below the running plate have not changed much (if at all) on the NGG16s during their various overhauls. Above the running plate is a different matter as boiler swaps during the 10 year overhauls have lead to the clack valves being in different places (either towards the front of the boiler or just ahead of the dome) according to which boiler is fitted. As to my favourite Garratt? When they were oil fired it was definitely 143, 138 did not steam as well on oil. Both engines were much better steamers when they went back to coal firing. 130 has a similar performance to 138 and 143. 87 uniquely has a Lempor exhaust and is definitely the loudest of the Garratts when working hard. So 143 (I did a lot of my firing training on it) closely followed by 87. Regards Steve On 5 Jan 2025, at 21:51, Allan Dare via groups.io <allan.dare@...> wrote:
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