Content

• Steps
• Method 1 of 3: Moving in Physics
• Method 2 of 3: Internal Combustion Engine Displacement
• Method 3 of 3: Displacement of the vessel
• What do you need

In English, one word corresponds to all three concepts - displacement, displacement and engine volume: displacement. This is because all three concepts are united by a common action - movement. Displacement in physics speaks for itself, the displacement is equal to the amount of displaced (displaced) water, the volume of the engine is the amount of gas with which the piston works (moves). Use this article to calculate all three concepts.

Steps

Method 1 of 3: Moving in Physics

1. 1 Determine the speed of the body. Also determine the travel time.
2. 2 Calculate the displacement. The movement is equal to the product of the body's speed and the travel time. For example, a body moving at a speed of 10 m / s for 2 seconds will move 20 m.

Method 2 of 3: Internal Combustion Engine Displacement

1. 1 Measure the cylinder diameter. Open access to the cylinders. Choose any of them in which the piston will not interfere with the measurements. Use a vernier caliper to measure the inside diameter of the cylinder.
2. 2 Find the piston stroke. Crank the engine so that one of the pistons is at bottom dead center (BDC). Attach a dial gauge to the piston.
3. 3 Crank the engine to bring the piston to top dead center (TDC). Pay attention to the indicator of the indicator - this is the piston stroke.
4. 4 Determine the engine size. Multiply the stroke by the square of the cylinder bore and by 0.7854 (stroke * bore * bore * 0.7854) to calculate the volume of 1 cylinder. Multiply the volume of 1 cylinder by the number of cylinders in the engine to get the total volume of the engine.

Method 3 of 3: Displacement of the vessel

1. 1 Marine units. The unit of mass used is a long ton equal to 2240 lb (1018 kg). A long ton also correlates with a volume: 100 cubic feet (2.83 cubic meters) of the vessel's internal volume = 1 long ton.
2. 2 Take either step A or step B. Step A:
   • Find the volume of the submerged part of the ship (it is obviously equal to the volume of the displaced water, and the displacement is the mass of this water). Measure the following quantities in meters. Multiply the total length of the boat by the width of the boat (in the middle of the boat) by the height of the boat (from keel to waterline) by a special factor (which is designed to take into account the fact that any boat is not cuboid). Different ships have different shapes, so the coefficient ranges from about 0.4 to about 0.8. This calculation will give the volume in cubic meters.
   • Calculate the displacement. Divide the value found above by 2.83 to get the weight of the displaced water in long tons. Of course, you can make a correction for salt or fresh water, since they are of different densities, and therefore their equal volumes have different masses.
   • In reality, ships are immersed in water in different ways. Therefore, step B is more preferable.
3. 3 Step B:
   • Record the ship data as shown in the figure (six values): load line, bow, center of the ship and stern, port and starboard, and enter the values ​​into the hydrostatic table of the ship. Write down the result.
4. 4 Please note that in any case, you cannot find the displacement without knowing the data on the shape of the hull. The coefficient and hydrostatic tables are published by shipbuilders after the ship is launched.

What do you need

• Calipers
• Dial indicator