A TRS19 and above steam engine spec for the Southern Railway's 3 cylinder light pacific as designed by O.V.S.Bulleid. Boiler Pressure: 250psi. Tractive effort: 27720lbs. In 1952 BR reduced the boiler pressure for the whole class, and this spec. represents them in this form. This spec. uses real world data and will perform most accurately if used with Stovepipe's e-specs for British rolling stock.