In the case of bipropellants, fuel and oxidizer are kept physically separated until they are injected into the combustion chamber. Combustion akes place under the usual high-temperature and pressure conditions, producing high velocity exhaust gases. A few of the many liquid fuels and oxidizers ha have been investigated as possible missile propellants are discussed below in order to familiarize you with their properties and limitations. Aniline, hydrazine hydrae, and ethyl alcohol are three of he more commonly used liquid fuels. Since there is a large industrial demand for aniline for use in dyes, poins, and solvents, previously developed manufacturing processes make it easily obtainable.
Aniline is manufactured by subsequent nitration and reduction of benzene.
Upon contact with red fuming nitric acid, it ignites spontaneously. A fuel and oxidizer reacting in his manner are said to be hyergolic . This combination was successfully used in the WAC Corporal. It is noncorrosive, stable o shock, and burns similar to kerosene. It should be protected from sunlight to lessen deterioration.