Neither steam locomotive featured - the S1 and the T1 respectively - was considered a success: stylistically exciting to watch, but engineering failures. The S1, a 6-4-4-6 type from 1939, had bad weight distribution which led to dangerous balance and wheel-slippage problems that were never completely resolved, despite a number of attempted fixes. The S1's excessive length - 140 ft (43 metres) - prevented it from negotiating a lot of the PRR trackage. Only one was built and its last run was in 1945. The T1, a 4-4-4-4 type first built in 1942, experienced violent wheelslip both when starting and at speed, was complicated to maintain and expensive to run. A total 52 were built but in 1948 the PRR decided to put diesels on its express passenger trains. Again we recommend reading available books for the full story.
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| Advert from 1945 featuring the S-1 |
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