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The initial concept considered 15-inch or 16-inch diameter bodies due to the practical problems of using larger bodies and being able to launch them in sufficient numbers; ultimately, the 18-inch Mark 15 torpedo was chosen for conversion to rocket propulsion instead. In 1952, the project's priority was greatly downgraded, which delayed ...
Torpedo propulsion systems vary but electric torpedoes swim out of the tube on their own and are of a smaller diameter. [clarification needed] Torpedoes with 21-inch (530 mm) diameter and fuel-burning engines usually start outside the tube. Once outside the tube the torpedo begins its run toward the target as programmed by the fire-control ...
There have been a number of 18-inch torpedoes in service with the United States. These have been used on ships and submarines of the US Navy. American "18-inch" torpedoes were actually 17.7 inches (45 cm) in diameter, beginning with the "Fiume" Whitehead torpedo of 1890. Ship classes that carried 18-inch torpedoes include:
Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...
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AN sizes range from -2 (dash two) to -32 in irregular steps, with each step equating to the OD (outside diameter) of the tubing in 1 ⁄ 16-inch increments. Therefore, a -8 AN size would be equal to 1 ⁄ 2-inch OD tube. However, this system does not specify the ID (inside diameter) of the tubing because the tube wall can vary in thickness.
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