Normally a ship fitted with steam turbines has an astern power, one third of ahead power. If a ship is 7,000-ton deadweight with speed of 15 knots, what is the astern power?
Given:
Deadweight = 7,000 tons
Speed = 15 knots
What is asked:
Astern power
Solution:
Step 1. Solving for ahead power
Ahead Power = Weight × Speed
= 7,000 tons × 15 knots
= 105,000 knot-tons is the ahead power
Step 2. Solving for astern power. We are going to get one third of 105,000.
Astern power = 105,000 knot-tons × 1 = 35,000 knot-tons
3
Given:
Deadweight = 7,000 tons
Speed = 15 knots
What is asked:
Astern power
Solution:
Step 1. Solving for ahead power
Ahead Power = Weight × Speed
= 7,000 tons × 15 knots
= 105,000 knot-tons is the ahead power
Step 2. Solving for astern power. We are going to get one third of 105,000.
Astern power = 105,000 knot-tons × 1 = 35,000 knot-tons
3
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