crew compartment protection; fire source and extinguishing system in the test compartment; hybrid extinguishers; high pressure extinguisher; summary of experimental results without explosion suppression; agent discharging toward fire source; summary of experimental conditions and results with different agent discharge direction; agent discharging sideways; presence of an obstacle in the compartment; summary of experimental conditions and results with present of obstacle in the compartment; hybrid/water extinguisher using additives