|
| Title: |
UP DD35A 71 |
| Description: |
Union Pacific Railroad DD35A 71 at Council Bluffs, Iowa on May 31, 1965, Kodachrome by Lou Schmitz, Chuck Zeiler collection. This locomotive was completed in April 1965 (c/n 29985) on EMD Order 7797 and retired August 24, 1981 and scrapped. It produced 5000 hp from 32-cylinders (two 16-cylinder prime movers). When EMD built the DD35, the intention was that it was a B (Booster) unit, no control cab, to be mated to a GP35 for control. The DD35A version with a cab was built in 1965 for the UP (after the DD40 model had been announced) and had the sloping radiators that were applied to the 645-engine SD40 test units. While the DD40 was to have two 645 diesels, the DD35A had two 567D3A diesels. UP 70-83 were built using reconditioned GE 752 traction motors (with 74:18 gear ratio) from trade-in Alco FA and FB cab units. EMD used the designation 752E20A for these reconditioned traction motors. UP 84 was built in part using the reconditioned EMD D67B1 traction motors from wrecked trade-in UP GP9 159 and was equipped with 62:15 gearing. The DD40 design was cancelled in 1966, however, EMD did build 47 DDA40X Centennial locomotives for the UP starting in 1969. |
| Photo Date: |
5/31/1965 Upload Date: 11/10/2010 2:14:26 PM |
| Location: |
Council Bluffs, IA |
| Author: |
Lou Schmitz |
| Categories: |
Roster |
| Locomotives: |
UP 71(DD35A) |
| Views: |
3588 Comments: 2 |
|
|
|
| Title: |
UP DD35A 82 |
| Description: |
Union Pacific Railroad DD35A 82 at Los Angeles, California on January 25, 1978, Kodachrome by Joseph R. Quinn, Chuck Zeiler collection. Number 82 was completed in June 1965 (c/n 29996) on EMD Order 7797, retired in October 1979 and sold for scrap. It was built using reconditioned GE 752 traction motors (with 74:18 gear ratio) from trade-in Alco FA and FB units. EMD used the designation 752E20A for these reconditioned traction motors. When EMD designed the cabless DD35, the intent was to use a GP35 (or any cab equipped locomotive) as the lead. There was concern about "nosing", the tendency for such a large rigid wheelbase locomotive to go straight when it encountered curves in the track, thus realigning the track. The track standards were better on the UP than some other railroads, and the problem did not materialize. So the UP asked EMD to install cabs on the next batch of 15 DD35's, and by the time of the order, EMD had some 645 prime mover equipped SD40's in field testing, so the DD35A's got the same flared radiators as the test units. UP DD35A 82 was equipped for Radio Control (RC) operation in May 1968, serving as the control unit, matching UP #82B which served as the remote. All radio control equipment was removed from both units during July 1973 at Salt Lake City, Utah. |
| Photo Date: |
1/25/1978 Upload Date: 4/26/2011 2:57:26 PM |
| Location: |
Los Angeles, CA |
| Author: |
Joseph R. Quinn |
| Categories: |
Roster |
| Locomotives: |
UP 82(DD35A) |
| Views: |
5134 Comments: 0 |
|
|
|
