CHAPTER XXVI.

POWER OF LOCOMOTIVES AND TRAIN RESISTANCES 346

Calculating Power of Locomotives.--Proportion of Adhesion to Traction.--Estimating Tractive Power.--Horse-power of Locomotives.--Formulas of Train Resistances.--Experiments of Train Resistances on the Erie Railway.--Conditions that Increase Train Resistances.--Resistance of Curves.--Work done by a Locomotive pulling a Train.--Record of Fast Express Train made by Professor P. H. Dudley’s Dynagraph Car.--Calculations of Weight of Trains that Locomotives can Pull.