Watch and listen closely to the EIGHT exhaust beats per revolution of the drivers, resulting from 4 cyls, 2 outside & 2 inside, plus a rather unusual arrangement of their corresponding crankpins on the circle of revolution. The scheme was created by H. Holcroft, a railway mech. engineer with the GWR and later the Southern.
Watch and listen closely to the EIGHT exhaust beats per revolution of the drivers, resulting from 4 cyls, 2 outside & 2 inside, plus a rather unusual arrangement of their corresponding crankpins on the circle of revolution. The scheme was created by H. Holcroft, a railway mech. engineer with the GWR and later the Southern.
4129SDS 1 year ago