by railfan365
Does anyone have any idea why the R-44's on SIR are continuing in service while the ones on the 8th Avenue have all been retired due to structural defects? After all, they were all purchased together.
Railroad Forums
Moderator: GirlOnTheTrain
Kamen Rider wrote:Plan A is to ship the R46s to SI, replaced in the subway by the R211s in or around 2015. The R179 will mostly be to just phase out the 300 or so R32s and R42s left.would anything special modifications be needed to the R46s so that they can run on the SIR to comply with FRA requirements, (the R44's here are modified with a heavier frame, different trucks, FRA safety glass etc...)
Head-end View wrote:R-36: I believe both the R-44's and 46's were built as cab-cars and cab-less cars. If that makes them "single" units, that's fine. But, I think both were the same set-up.Some cars having cabs and others not does not make them single units - it makes them A units and B units. A single unit is a car that is not permanently attached to any others.
Kamen Rider wrote:To settle the discussion. the R44s and R46s were built as single units and converted into permintate units during thier rebuilds. The B cars have always been B cars, and required an A car to operate.I think you may be confused with the R62/R62A/R68/R68As, which were originally all single units and converted into linked unit sets during SMS.
R36 Combine Coach wrote:Aren't there also B-unit SI R44s? I know that all of SI's R44s have couplers.Kamen Rider wrote:To settle the discussion. the R44s and R46s were built as single units and converted into permintate units during thier rebuilds. The B cars have always been B cars, and required an A car to operate.I think you may be confused with the R62/R62A/R68/R68As, which were originally all single units and converted into linked unit sets during SMS.
The SI R44s are single units as they can operate independently (A units), unlike the linked A-B-B-A R44/46s.