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Ammonium perchlorate composite propellant
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<p>Ammonium perchlorate composite propellant (APCP) is a <a href="/facts/Solid_rocket_propellant/RpgdYKIU">solid rocket propellant</a>. It differs from many traditional solid <a href="/facts/Rocket_propellant/IyFhQEA2">rocket propellants</a> such as <a href="/facts/Black_powder/AEcB6HCR">black powder</a> or <a href="/facts/Solid-fuel_rocket/RpgdYKIU">zinc-sulfur</a>, not only in chemical composition and overall performance but also by being <a href="/facts/Casting/cFJ0hPuU">cast</a> into shape, as opposed to <a href="/facts/Powder_metallurgy/tv9uXamF">powder pressing</a> as with black powder. This provides manufacturing regularity and repeatability, which are necessary requirements for use in the aerospace industry. </p>