How to Calculate Bulkhead Breakaway Force

Boating down a rushing river in a kayak can be fun, exciting and dangerous. Each kayak manufactured today has a breakaway force in which the kayak will break away from the paddler. A paddler sits in the kayak with her feet in the bulkhead. If the kayak is hit with a certain force, it will break away from the paddler slowing her down and allowing her to free herself safely.

Things You'll Need

  • Kayak
  • Wave pool
  • 6 bungee cords
  • 4 underwater cameras with still-frame picture abilities
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Instructions

    • 1

      Place the kayak in the center of the wave pool.

    • 2

      Attach three bungee cords to either side of the kayak.

    • 3

      Attach the other end of the bungee cords to either side of the pool to hold the kayak in the middle of the pool.

    • 4

      Position two underwater cameras in front of the kayak under the water. Ensure that the cameras will not move when the water reaches higher speeds.

    • 5

      Position two underwater cameras behind the kayak under the water. Ensure that these cameras are not able to move as well.

    • 6

      Start the cameras and the wave-pool water. Begin sending the waves toward the kayak at 5 kilometers an hour.

    • 7

      Increase the speed of the water 1 kilometer per hour at a time, recording what you see happening to the kayak.

    • 8

      Watch for when the kayak begins to break apart. Record at what speed this occurs.

    • 9

      Ask the wave-pool mechanic the pressure/force the water was being pushed at to create the water speed for the kayak to break. This pressure is the breakaway force for the kayak you are testing.

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