Construction
The 105 were divided into five orders, which can be put into two groups: the first two orders of "light" Challengers, and the final three of "heavy" Challengers.
| Class | Quantity | Manufacturer | Serial Nos. | Year | UP No. | Notes |
|---|---|---|---|---|---|---|
| CSA-1 | 15 | American Locomotive Company | 68745–68759 | 1936 | 3900–3914 | Converted to oil fuel in 1941–43; renumbered 3800–3814 in 1944 |
| CSA-2 | 25 | American Locomotive Company | 68924–68948 | 1937 | 3915–3939 | Converted to oil fuel; renumbered 3815–3839 in 1944 |
| 4664-3 | 20 | American Locomotive Company | 69760–69779 | 1942 | 3950–3969 | |
| 4664-4 | 25 | American Locomotive Company | 70158–70162 70169–70182 70678–70683 |
1943 | 3975–3999 | 3975–3984 converted to oil fuel in 1945; renumbered 3708–3717 in 1952 |
| 4664-5 | 20 | American Locomotive Company | 72792–72811 | 1944 | 3930–3949 | 3930/31/32/34/37/38/43/44 converted to oil fuel in 1952 and renumbered 3700–3707. |
Two examples survive today: Union Pacific 3985, used for excursion services by Union Pacific and Union Pacific 3977, on static display in North Platte, NE.
Read more about this topic: Union Pacific Challenger
Famous quotes containing the word construction:
“There’s no art
To find the mind’s construction in the face:
He was a gentleman on whom I built
An absolute trust.”
—William Shakespeare (1564–1616)
“When the leaders choose to make themselves bidders at an auction of popularity, their talents, in the construction of the state, will be of no service. They will become flatterers instead of legislators; the instruments, not the guides, of the people.”
—Edmund Burke (1729–1797)
“There is, I think, no point in the philosophy of progressive education which is sounder than its emphasis upon the importance of the participation of the learner in the formation of the purposes which direct his activities in the learning process, just as there is no defect in traditional education greater than its failure to secure the active cooperation of the pupil in construction of the purposes involved in his studying.”
—John Dewey (1859–1952)