Before revision: Shoulder locations are similarly staggered to minimize weakness.Fairfield (1921) p.235 Assembly Procedure After the tube, jacket, and hoops have been machined to appropriate dimensions, the jacket is carefully heated to approximately 400 degrees Celsius (800 degrees Fahrenheit) in a vertical air furnace so thermal expansion allows the cool tube to be lowered into place.
After revision: Shoulder locations are similarly staggered to minimize weakness.Fairfield (1921) p.235 Assembly procedure After the tube, jacket, and hoops have been machined to appropriate dimensions, the jacket is carefully heated to approximately 400 degrees Celsius (800 degrees Fahrenheit) in a vertical air furnace so thermal expansion allows the cool tube to be lowered into place.