Design, Development and Fabrication of Training Round to Simulate Projectile, 155-mm, HE, M107 (XM804) (Phase 1)
Final technical rept. 9 Feb 1978-28 Feb 1979
CHAMBERLAIN MFG CORP WATERLOO IA RESEARCH AND DEVELOPMENT DIV
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The following four design approaches to develop a 155-mm Training Projectile XM804 which would be similar to the standard 155-mm, HE, M107 Projectile but would be significantly more economical to manufacture were investigated 1 a forged body with heavy walls 2 an inert-filled forged M107 shell 3 a pressure-cast shell and 4 a sand-cast shell. The sand casting approach was eliminated early in the program based on preliminary studies which indicated that this method would not be cost effective. A forged heavy wall XM804 Training Projectile design was developed which simulated the HE-loaded M107 Projectile ballistically and would withstand firing at Charge, Zone 7 as evidenced by dynamic tests. Charge, Zone 5 is considered the maximum charge for training purposes. Dynamic tests also showed that the inert wax load in the standard 155-mm, M107 Projectile can be replaced by the lower-cost inert Hydro-Cal load. A method for manufacturing the XM804 Projectile by pressure- casting was demonstrated successfully. Calculations based on this investigation indicated that the cost savings for the forged and the pressure-cast heavy wall XM804 Projectile would be 41 and 48, respectively, under the standard round cost.
- Fabrication Metallurgy
- Ammunition and Explosives