railfan365 wrote:An additional question that have in connection with the R-188's: What is a C unit? I already know that A means with a cab and that B means without a cab. But I've never heard of C.
A C-unit is the "11th car" that was made brand new for each R188 set. From the R142's they got two five car sets of A-B-B-B-A to make a 10-car train. However, the Flushing Line needs 11-car sets, so they made an extra C-unit from scratch that gets inserted in next to the A unit at either end of the train.
You can tell which one is the C-unit because the interior lights look brighter than all the others.
In this video, the second car is the C-car, as you can tell by the interior lights.