BandA wrote: ↑Sat Mar 07, 2020 11:13 pm
CRRC has made a lot of cars in China, why hasn't this problem shown up before?
Subway cars are unique and aren't off-the-shelf mass produced products, as you may know. Since there was a 60% US content requirement in the contract, my guess is that the CNR engineers were using bolster pads sourced from a US company for the first time and had different expectations of the bolster pads than what they were used to.
typesix wrote: ↑Sun Mar 08, 2020 1:36 pm
Here is one reported similar story involving bolster cracks. The story notes that it may be related to impurities in the aluminum carbodies.
https://www.hongkongfp.com/2016/07/05/m ... ue-cracks/
Except that the Singpore MRT cars are completely different from the MBTA cars as well as being designed by a completely different project team. Off the bat, you noted that the MRT cars have aluminum carbodies. Well, the MBTA cars have stainless steel carbodies. CSR and CNR may have merged to form CRRC, but they still operate independently of each other. FYI, CSR did bid on the MBTA contract, but their proposal did not make it to evaluation because it did not meet the performance requirements.
Head-end View wrote: ↑Sun Mar 08, 2020 7:20 pm
Wel maybe we just shouldn't be buying trains from a company in China........ But I guess the low bidder price is all that matters.
Nope. There were two parts to the selection process: the technical proposals and the price proposals. The technical proposals were evaluated first and CNR outperformed everyone, including Kawasaki. The low price was icing on the cake and sealed the deal for CNR.