How is the tractive effort of a multiple unit consist/lashup determined? Is it cumulative?
Original Post
I'm going to say yes.. In the employees Time card each locomotive is rated for a certain tonnage it can pull over the controlling grade. There may be different grades on one subdivision and the ratings may vary.
So we take all the engines and their ratings and add them up to determine the tonnage they can pull over a certain grade.
There were exceptions.... Traction motors cut out etc....
Roughly one horse power could pull one ton.
The Conductor kept track and figured out the Tonnage... Lite tons, Heavy tons Car factor Existing tons and tons handled.
