SCHOOL TIME! ring the bell!
U25B
With the U25B, If the unit had Dynamic brakes, you could see the brake grids thru the rear radiator mesh, if it did not, you just saw thru to the other side unimpeded, barring what the blower was blocking.....
Also, there were 2 phases to the U25B.... the differences were in the front windshield and nose....
Phase one had a one piece main windshield and a flat nose
Phase Two had a 2 piece main windshield and a sloped nose
Now, to really bake your noodle, the original Demo unit had a high nose and vertical ladders instead of stairwells. UP and Frisco bought some of their units like this.
U28B
The U28B had 2 phases....
The phase one U28B used the phase 2 U25B body......
The phase two U28B was similar except the "humps" on the back end are gone, the cab was moved forward and the nose shortened to the classic GE look we all know
If the unit had Dynamic brakes, you could see the brake grids thru the rear radiator mesh, if it did not, you just saw thru to the other side unimpeded, barring what the blower was blocking.....
U25C
Had a body similar to the U25B except the cab was moved forward and the nose was shortened to provide space behind the cab for a steam generator. The nose and cab position would carry thru the C36-7 model.
Phase one had the one piece windshield
Phase two had the 2 piece windshield
Unit was longer than the U25B
Same deal with the rear radiator mesh
U28C
The Phase one U28C used the Phase U25C body.
The Phase two U28C had a body similar to the Phase one, except the rear "Humps" were deleted.
Unit was longer than the U28B.
Same deal with the rear radiator mesh
Extra credit:
http://www.hosam.com/model/ge.html
http://www.ttnut.com/ge-u28-and-u30-info-t849.html
http://rmweb.co.uk/forum/viewtopic.php?f=67&t=13115
And that has been today's lecture, there will be a test later, I hope you took notes!