ABSTRACT:The potassium nitrate (KNO 3 )/sucrose (C 12 H 22 O 11 ) propellant, known as KNSu, is traditionally used in rocket studies by amateur groups. Performance tests of KNSu, whose composition is 65 wt% KNO 3 and 35 wt% C 12 H 22 O 11 , cold-manufactured by mechanical press, are presented in this paper. The study determines the behaviour of density (ρ) and burning rate (r) as function of compression pressure (P c ) for the propellant grain manufacturing. Fortyfour samples were prepared and tested, for seven different values of P c . It was observed that ρ and r depend on P c , according to quadratic polynomial functions, and the mass flux per unit area is a constant.

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