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Davis Resistance Formulas

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K Brand

September 01, 2000 06:56AM

Davis formulas
Locomotive Resistance,
lb/ton = 1.3 + 29/W + 0.03V + 0.0024AV^2/WN
Psgr Car Resistance,
lb/ton = 1.3 + 29/W + 0.03V + 0.00034AV^2/WN
Frt Car Resistance,
lb/ton = 1.3 + 29/W + 0.045V + 0.0005AV^2/WN
W=Ave tons /axle
N=Number of axles
V=Speed(mph)
A=Frontal Area(sq ft)
Grade Resistance =
(2000lb * 1ft)/100ft = 20lb/ton for 1% grade
Curve Resistance = 0.8lb per ton per degree of curve

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Subject	Author	Posted
Tractive Effort Question	Duane Richardson	August 31, 2000 07:12PM
Re: Tractive Effort Question	Jim Adams	August 31, 2000 08:13PM
Re: Tractive Effort Question	Brian Fritz	August 31, 2000 08:50PM
Re: Tractive Effort Question	Bob	August 31, 2000 09:14PM
Re: Tractive Effort Question	Jim Adams	August 31, 2000 10:12PM
Re: Tractive Effort Question	Randall Hess	September 01, 2000 01:44PM
Davis Resistance Formulas	K Brand	September 01, 2000 06:56AM
K-28	Herb Kelsey	September 01, 2000 09:45AM
Re: K-28	Rob Gram	September 01, 2000 05:56PM
Right On! NM	Herb Kelsey	September 03, 2000 12:40AM

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