Rocket projectile

A.R. Garabrant, J.F. Coburn L. Avrami, Moderation of the Sensitivity of Certain Lead Azide/RDX Mixtures , Third International Conference on Rocket Projectile Guidance/... 

HCl molecules form visible white fog when water vapor is present in the atmosphere. An HCl molecule acts as a nucleus, becoming surrounded by HjO molecules, which forms a fog droplet large enough to be visible. When the combustion products of an AP composite propellant are expelled from a rocket nozzle into the atmosphere, a white smoke trail is seen as a rocket projectile trajectory whenever the relative humidity of the air is above about 40%. Furthermore, if the temperature of the atmosphere is below 0 °C (below 273 K), the HjO molecules generated among the combustion products form a white fog with the HCl molecules even if the relative humidity is less than 40 %. Thus, the amount of white fog generated by the combustion of an AP composite propellant is dependent not only on the humidity but also the temperature and pressure of the atmosphere. 

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. 

Unlike a solid rocket, a ducted rocket requires continuous airflow from the atmosphere to the ramburner through the air-intake. When a ducted rocket projectile is accelerated to a certain flight speed, compressed air is induced from the atmosphere. Once sufficient compressed air has been introduced into the ramburner, the ducted rocket starts to operate and generates thmst. The booster rocket attached... 

The FJ test is similar to an aerodynamic wind-turmel test used for supersonic aircraft, except for the airflow condition. A ducted rocket projectile is mounted on a thrust stand and the projectile and thmst stand are placed in a test chamber. A supersonic airflow simulating the flight conditions is suppHed to the projectile through a supersonic nozzle attached to the front-end of the test chamber. The pressure and temperature in the test chamber are kept equivalent to the flight alHtude conditions. The aerodynamic drag on the projectile and the thmst generated by the ducted rocket are measured directly by the FJ test. The airflow surrounding the projectile and the combustion gas expelled from the ramburner flow out from the exhaust pipe attached to the rear-end of the test chamber. 

German 32cm Rocket Projectile Incendiary carried a charge of 13 gals of flammable oil. 

Rocket Motors (Roketto Hasshaki) are devices designed to provide propulsive power (propel or launch) to a Bomb or Rocket Projectile of an inclined trough or barrel called Launchers One of such Rocket Motors is described and illustrated in the book of Tantum Hoffschmidt (Ref 7, p 172) under the title Rocket Launcher and Rocket Motor Model 10 . It is briefly described here under Rocket Launchers. They are also described in Ref 2, pp 120-1 Another Rocket Mortar (Type 4 Mk 1) is described here under ROCKET BOMBS as a device used to propel Baka Piloted Rocket Bomb (Ref 2, p 118)... 

Three types of combustion test facility are used to evaluate the combustion efficiencies of ducted rockets direct-cormect flow (DCF) test, semi-freejet (SFJ) test, and freejet (FJ) test, as shown in Fig. 15.13. Pressurized heated air or cooled air is supplied to the DCF, SFJ, and FJ test facilities. The pressure and temperature of the airflow are adjusted by means of an air control system to simulate the air conditions during flight of the ducted rocket projectile. In the case of the DCF test, the airflow is supplied to the ramburner from a pressurized air tank through a directly connected pipe. No air-intakes are used in the DCF test Thus, the pressure and temperature of the air in the ramburner are as directly supplied from the pressurized air tank. No supersonic flow or shock waves are formed during the supply of air to the ramburner. In the DCF test, the combustion efficiency in the ramburner is measured as a function of the air-to-fuel flow ratio, e. The combustion charac-... 

RIA Rock Island Arsenal, Rock RP rocket projectile... 

Chemical agents in the U.S. stockpile are stored in a variety of containers and munitions, including bulk (ton) containers, rockets, projectiles, mines, bombs, cartridges, and spray tanks. Figure 1-1 summarizes the stockpile configuration for the eight continental U.S. 

In rocket technology, the ratio between the initial mass of the rocket and its final mass, after the propellant has burnt out. The relation between the end-velocity of a rocket projectile (theoretical value, without considering friction by the atmosphere) and the mass ratio is described by the equation... 

Me mass of the rocket projectile after propellant has burnt out,... 

A project was developed on campus for the design and development of rocket projectiles. By September [1941] it was well imderway, under the able leadership of physics professor Charies C. Lauritsen, and it continued through the deployment of the atomic bombs on Japan, until September,... 

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