1) PRR Horseshoe curve says;
IT's doal motor but the rear motor is on a single axle truck.
The rear truck also has two axles, in order to allow proper tracking, but the front wheelset is undersized to make it harder to see. Nevertheless, only the rear axle on the rear truck is driven:
2) PRR Horseshoe also asked;
"How did you "change the rear lights?"
The red lenses pop out as a single unit. I cut off one side and replaced it with a clear lens. The clear lens has aluminum foil on the back, show only the red one glows.
3) Dan986 said:
The observation car on the Aerotrain reminds me of the rear end of a 1955 Chevy Nomad station wagon
It should. The Aerotrain was designed by Harley Earl, the head of the GM design studios. While the rear looks like it was lifted from the '54 Nomad, I always thought the front was taken from train from Disneyland's "Tomorrowland, also a GM design.
But only after it was allowed to breed with Gort from the original "Day the Earth Stood still"
4) I wrote an article in O Scale trains on converting the Aerotrain to 2 rail, but I made several modifications to improve its running characteristics and appearance which would apply to three rail as well; It is Issue #59, Nov/Dec 2011. Its too new to be downloaded for free, but you can order a copy. See http://oscalemag.com/wordpress/covers-contents-1-59/
5) Among the modifications I made was too put in full width, fixed fender skirts:
Before:
After:
6) The two modifications I did not make (becuase of time constraints) were to add a swingout coupler to the nose (the PRR Aerotrain had to be pulled out of NYC Penn Station by a GG1, because of restrictions against internal combustion engines) and to figure out how to make that "Aerotrain" script emblem on the nose out of raised chrome plated lettering. Just like that 55 Nomad posted by Dan986. I'll pass on the mods suggested by Ace.