# Traction Mechanics

on May 6, 2013

Traction Mechanics is the study of train motion.

The mechanics involve converting overhead electrical /diesel/steam power in rail horsepower to haul a train encountering acceleration, train, grade, curve resistance, and similar braking.

Traction Mechanics involves the concept of

for detailing the motion of a train.

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### Units

The units followed in the day-to-day talk of Railways are different from the conventional MKS systems. The conversion table is given below for a better understanding

 Item Symbol Railway convention MKS Time t Hours 3600 sec Distance D Kilometer 1000 meters Speed V Kmph 1000/3600=0.277m/sec Acceleration fa Kmph/sec 0.277m/sec/sec Weight W Tonne 1000Kg Force F Kgf 9.8 Newton Energy/Work kWh kWh W-sec or N-m or Joules

### Formulas

where D-distance;V-final speed; U-initial speed; a-acceleration

where W in N-m or Joules or Watt-sec)

where TE is in Kgf, V in Kmph and HP=75*Kgf*m/sec

where  η is efficiency  of Loco

### There is 1 Comment

1. I read your guidance given regarding Group B Exam in Railway which was very practical

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