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Erie 0-8-8-0 Camelback locomotive at Port Jervis, N.Y., in 1911. The camelback design was unique in that the engineer sat in the tiny cab alongside the boiler, while the fireman worked at the usual spot behind the boiler. One of the main disadvantages was the obvious communication problem between engineer and the rest of the train crew while the engine was in operation. The Erie camelback mallets didn't last long, but smaller camelback locomotives survived well into the 1950's on roads like the Jersey Central. View full size.