Re: [CBQ] Deadwood SD DSW1 question

["Winton" <runextra@gmail.com>]

I do not remember what the SW-1 weighed but a good guess might be 105 tons 
(210,000 lbs). Assuming it could get a 20% adhesion factor that would be 42,000 
lbs of traction. Gravity force on a 3% grade is 60 lbs per ton, on a 4% grade 
it is 80 lbs per ton. So the 42,000 lbs of TE divided by the 60 lbs per ton is 
700 tons max. That includes the weight of the loco itself so about 595 tons of 
freight cars on a 3% grade. I'd round that down to 4 loaded cars maybe.
On the 4% grades the figure would be about 525 tons total counting the loco so 
420 tons worth of cars. About 4 cars if you are really lucky.
And DON'T EVEN THINK about taking those loaded cars down that short 4.0% grade 
without the air brakes fully charged, tested, and applied. Those 4 cars will 
shove the sliding SW-1 right off the end of track. 

Winton


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