Rocket-assisted projectiles

Rugg, Feasibility Studies Relative to using New Polymers and Plastics as Inhibitors to Replace Composition Presently Being Used With Rocket Propellant Grains of 155mm HE RAP (Rocket Assisted Projectile) , Final Rept — May-Dec 75, Contract DAAA21-75-C-0267, NY Univ, NY (1975) 11) T. Takayama, JapP 7518052... 

RDX/TNT Type A and 1A , CS5446 (no date) 117) Anon, Rocket Propellant Description Sheet on Extruded Rocket Assisted Projectile for 155mm, M549 AFT Proplnt Grain,DwgNo 7324786, Radford AAP, Radford, Va (no Date) 118) Anon, Paper AC 93, Phys/ Ex 11, Ministry of Supply, Engl (no date)... 

Rocket-Assisted Projectiles (RAP). In common with many European countries, the USA is devoting much effort to the development of rocket-assisted projectiles for tube artillery... 

Projectile, 155MM, HE, Rap, XM549 (With Warhead And Motor Body) Loading, Assembling and Packing Projectile, 155MM, HE, Rocket Assisted M549, Accessories For... 

Projectile, 155MM, HE, Rocket Assisted M549, Delay Assembly For... 

Figure 5.2 Uniform corrosion damage on a rocket-assisted artillery projectile.

Thus, AP is a valuable oxidizer for formulating smokeless propellants or smokeless gas generators. However, since the combustion products of AP composite propellants contain a relatively high concentration of hydrogen chloride (HCI), white smoke is generated when they are expelled from an exhaust nozzle into a humid atmosphere. When the HCI molecules diffuse into the air and collide with H2O molecules therein, an acid mist is formed which gives rise to visible white smoke. Typical examples are AP composite propellants used in rocket motors. Based on experimental observations, white smoke is formed when the relative humidity exceeds about 40 %. Thus, AP composite propellants without any metal particles are termed reduced-smoke propellants. On the other hand, a white smoke trail is always seen from the exhaust of a rocket projectile assisted by an aluminized AP composite propellant under any atmospheric conditions. Thus, aluminized AP composite propellants are termed smoke propellants. 

When a projectile assisted by a ducted rocket flies at velocity V along a trajectory with an angle 0 with respect to the ground, the thrust F is represented by... 

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