Really? R147, R150-R152, R154, R158, R163, R165-168, R171, R173, R176, R178, R180, R183-187 are all empty. The only numbers that will can be filled after 188 will be 189-210. You know, since things happen sequentially. And what do you mean by minimal time between eachother defines generations? The time between R179 and 211 should be similar to the time between R179 and 160 and 143. An average of 3-5 years in between each other, and a relatively short time. Going by what you said, it's what comes for the R142 and 143 replacements that would be the "next generation".
R162-12 Crane cars
R164 funded the options for the R142/A
R169-2 AC Dynometers
R170-3 Overhead cranes
R172-2 Ballast Regulators
R174-Identical to R156
R175-Replacement Shop equipment
R177-Third Vacuum Train
R179 cars
R181-207 Yard Overhaul shop cranes ans equipment
R182 AC/DC Tracton Motor Dynometers
R188 cars
R211 cars.
I never said there was. I said that might be where they are going with it. And don't say that's not possible, because it is.
It's just a thought, why so serious?