Abstract Nistenxier Chapman Jougurt, strong and weak detonation properties have been obtained for a five atom [C. H. O. N. A.] system. A digital computer programme has been developed which determines detonation properties in steady one-dimensional equilibrium flow. The equations and method of solution are set forth. Equilibrium and frozen sound speeds are calculated for the hot product mixtures. The effect of initial conditions and comparisons with experiment are given.