| 41. | These came with diameter drivers and boiler pressure, making these ATSF s the fastest and most modern of all.
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| 42. | The new firebox had a different shape and this reduced the boiler pressure from 245 psi to 215 psi.
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| 43. | During a General Repair at Eastleigh Works in November / December 1954, 34051 had its boiler pressure reduced from.
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| 44. | These, at a boiler pressure of, gave the locomotive a tractive effort of at 75 % of boiler pressure.
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| 45. | The S1 was similar to the NER Class S but had larger driving wheels and a higher boiler pressure.
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| 46. | From the second series, built in 1904, the boiler pressure of the S 3 / 5 was raised from.
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| 47. | Unlike the earlier version, these engines had a 2 bar higher boiler pressure and larger coupled wheel and cylinder diameters.
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| 48. | The upgraded engines were capable of producing more power : their boiler pressure was raised to and they could generate.
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| 49. | The boiler pressure was increased from 160 to 180 lbs per square inch but the cylinders reduced in diameter from.
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| 50. | The locomotive was rebuilt on 1878 with larger cylinders and an increased boiler pressure, which increased its tractive effort to.
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