Propulsion device, flying object comprising the same and propulsion device igniting method

A propulsion device operated in a bi-liquid mode uses a safe hydrogen peroxide as oxidizer (30) and yet has a large thrust and high response performance. A preheated net (18) is provided in a combustion chamber (14). Both of an oxidizer supply means (10) and a fuel supply means (12) open toward the net (18). Oxidizer (30) and fuel (32) are atomized on the net (18) to thereby increase the surface area. At the same time, the oxidizer (30) and fuel (32) are heated on the net (18) and their decomposition is accelerated. By quickly effecting collision and mixing of the oxidizer (30) with the fuel (32), an instantaneous ignitability can be obtained.