Talk:Central Railroad of New Jersey 113

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Boiler Pressure and Tractive Effort[edit]

According to the website of the group that operates and maintains CNJ 113, the locomotive operates at 185 psi instead of the as-built 200 psi. This is more than likely so that the locomotive meets the minimum factor of safety of 4.0. The boiler was probably too thin in some places to meet the 4.0 safety factor if it was run at 200 psi, so the group chose to de-rate 113 to 185 psi. With a decrease in boiler pressure also comes a decrease in tractive effort. At 185 psi, the locomotive produces a maximum tractive effort of roughly 42,408 lbs. I think this should be added to the article as there are other engines in operation with de-rated boilers, and it is noted in their articles. The Virginia and Truckee Inyo is an example.

Here’s the source for the boiler pressure decrease: https://www.rrproject113.org/cnj-113 I understand the source doesn’t say anything about the tractive effort decreasing despite the boiler pressure decrease, but the math doesn’t lie. GenesisFan99 (talk) 14:27, 27 October 2022 (UTC)[reply]