This propellant is commonly referred to as "Ammonium Perchlorate Composite Propellant", or simply APCP. Some torpedoes used hydrogen peroxide as oxidizer or propellant. It contains a conventional, casebonded solid rocket propellant. Solid propellant rockets are much easier to store and handle than liquid propellant rockets. Diborane has been tested as a rocket propellant. It is commonly used as a propellant and refrigerant. Zinc powder is sometimes used as a propellant in model rockets. All guns are powered by the explosive conversion of a solid propellant into gas. Minuteman ICBM a major advantage over earlier liquid propellant ICBMs. Cooling can be done regeneratively with the liquid propellant. There are many different methods for preparation of a sugar-based rocket propellant. There are a number of different methods for preparing a sugar-based rocket propellant. The proportion of saltpeter in the propellant was increased to maximize its explosive power. It is also used as a stabiliser in the manufacture of the propellant Cordite. Tripropellant rockets using three types of propellant are rare.