Turboliners

The HEP on the RTG turboliners is provided by a small auxiliary gas turbine engine and not the prime mover engine.
I personally think that any AC problem was the greenhouse effect from the Large windows that everyone loved.

I'm curious - was this one part of trainset #4 or #5? I'm guessing it was the fifth, as the fourth set was reportedly all but complete. It's hard to tell, but this set under the tarp could be the fourth RTL III.