Downloaded from https://www.everyspec.com TABLE OF CONTENTS-(continued) Pap B. Heating ........ ..................... 9 1. Thermal Stresses ...... ................ 9 2. Dimensional Changes ...... .............. 11 3. .. k.O ff . .. ................... i1 C. Erosion ........ ..................... 12 1. Causes ........ .................... 12 2. Region Affected ....... ................ 12 CHAPTER 5. WAYS OF MINIMIZING HARMFUL EFFECTS TO GUN TUBES ......... ..................... 13 A. Mechanical Design ....... ................ 13 1. High Strength Materials ..... ............ 13 2. Vibration Correction Measures ..... ......... 13 3. Vibration Calculations ...... ............. 13 B.
Cooling Methods ..................... ... 17 1. Large Tube Masses ...... .............. 17 2. Coolants ....... ................... 18 3. Boundary Layer Cooling ..... ............ 18 4, Low Heat Input ....... ................ 19 C. Low Erosion Measures .................... 19 1. Rotating Band Properties ................. 19 2. Rifling ..... .................... ... 19 3. Liners and Plating ................... ... 21 CHAPTIR 0, GUN TUBE DESIGN .......................... 22 * A. Design Objectives ....... ................ 22 B. Interior Ballistics Curves ...... ............. 22 C. Chamber Requirements ...... .............. 22 1. Cartridge Case Fit ...... ...............
23 2, Chamber Slope ....... ................ 24 3. Forcing Cone Slope ...... .............. 24 4. Chamber Geometry-Recoilless Guns .......... 24 D. Nozzle Design, Recoilless Guns ................ 26 1. Parameters. ....... .................. 26 2. Nozsle Shape ....... ................. 27 3. Nozzle Pressure Distribution ..... .......... 28 4. Recoil Balancing .................... ... 28 E. Bore ........ ...................... 30 1. Bore Diameter ....... ................ 30 2. Bore Length ....... ................. 30 F. Temperature Distribution .................. 30 Ill ? | | l | | | l | | l | l | l | .