First Generation Tractive Effort Ratings?

Finderskeepers · **Posted:** Tue Jun 26, 2007 11:01 am

From Santa fe tests 1942, class 100 diesels (EMD FT 4 unit set)
starting tractive effort 230,975lbs
at 13mph= 134,000lbs
at 25mph= 73,000lbs
at 40mph= 47,250lbs
at 60mph= 30,100lbs

As an interesting aside, the 5011 class 2-10-4 steamers
could provide more tractive effort and drawbar horsepower at any speed over 25mph, they just couldn't start as much tonnage, once rolling they had the advantage.

SR&RL No. 10 · **Joined:** Wed Sep 29, 2004 5:34 pm **Posts:** 39

superheater wrote:

FT (per unit)
F-3 (perunit)
F-7 (per unit)
GP-7 (per unit)

et al...

Don't have any of the above list, but "et al:"

Engine . . . . HP. . . . . . TE . . . . . . Weight
U25B . . . . . 2500 . . . . 81,000 . . . 260,000
F40PH . . . . .3000 . . . . 68,440 . . . 232,000
EMD F . . . . .1500 . . . . 57,500 . . . 230,000
Alco PA . . . .2000 . . . . 51,000 . . . 306,000
EMD E . . . . .2400 . . . . 53,080 . . . 315,000

Sources are various and I'm not sure I could find them all again. Alco PA is for the PA-1. I don't have any figures for the -2 or -3.