Time and spatially resolved measurements have been made of the tangential gas velocity component and the gas temperature at the time of fuel injection in a diesel combustion bomb. Velocities were measured using a laser doppler velocimeter and temperatures were measured using a. line wire thermocouple. Turbulence measurements are also presented and they indicate that at the time of fuel injection the turbulence field is approximately homogeneous and isotropic. An integral length scale of 15 mm is deduced from the decay rate.The pressure during the diesel burn is time resolved using a piezoelectric pressure transducer. High speed color schlieren photographs provide information about the fuel spray trajectory and the shape of the burning plume. Luminous photography is used to discover the time and place of the first ignition site.