3.3. Rimpull and Drawbar Pull

Try these first

1. 1.

   What is the rolling resistance for a machine weighing 30 tons with a resistance of 20 kg/ton?

   Hint

   Calculate by multiplying the weight in tons by the resistance value.

2. 2.

   If a machine sinks 5 cm into the surface with a resistance of 4 kg/ton, what is the penetration resistance for 10 tons?

   Hint

   Use the formula: Penetration Resistance = Depth in cm * Resistance kg/ton * Weight in tons.

3. 3.

   What is the required tractive effort on a 5% slope for a 20-ton vehicle?

   • 100 kg
   • 1000 kg
   • 1000 kg per ton

   Hint

   Think about the 10 kg per ton guideline for grade resistance.

4. 4.

   True or False: Grade assistance means additional effort is needed for downward movement.

   • True
   • False

   Hint

   Consider how gravity affects movement in logistical calculations.

5. 5.

   A bulldozer weighing 25 tons has a rolling resistance of 80 kg per ton. It's asked to move a load up a 10% slope. Calculate the total resistance.

   Hint

   Add rolling and grade resistance to find total.

6. 6.

   A 15-ton excavator has a maximum rimpull of 6000 kg. It faces a rolling resistance of 50 kg/ton. Calculate available pull at a 3% slope.

   Hint

   Understand how resistance impacts the rimpull available.