>>1526911>They were known for oscillating severelyIs this the oscillation thread?
>The saddle tank locomotive was originally delivered as a 0-4-0 ST with an open cab. Early tests on the railway showed that this wheel arrangement lead to unacceptable vertical oscillation, and in January 1867, Talyllyn was returned to its manufacturer for the fitting of a pair of trailing wheels, converting it into an 0-4-2ST