A steam engine (M) including at least: - one heating enclosure containing first heating means carrying a fluid (F) in the vapour state, - a vacuum chamber of vaporised fluid (F) connected upstream of the heating enclosure via a first pipe , - a second intake pipe disposed downstream of the heating enclosure and connecting the latter to a highpressure steam drive enclosure inside which at least one double acting piston is displaced, in an alternating and sealed manner, having a rod and a head on either side of which are defined: * A first compression chamber (C1) connected to a first inlet of vaporised fluid communicating with the second intake pipe and with a first outlet of vaporised fluid, and * a second compression chamber (C2) connected to a second vaporised fluid inlet also communicating with the second intake pipe and with a second vaporised fluid outlet , - the rod of the piston being connected to a connecting rod/crank assembly rotating a drive shaft thanks to the alternating linear movement of said rod , - the second intake pipe transporting the vaporised fluid (F) from the heating enclosure to the drive enclosure , - a third exhaust pipe connecting the first and second vaporised fluid outlets and the vacuum chamber , the third pipe transporting the vaporised fluid from the first and second outlets to the vacuum chamber , - the vacuum chamber , the heating enclosure heating, the drive enclosure and the first , second and third vaporised fluid transport pipes forming a closed sealed circuit, and - the first heating means is electrical and is connected to a power supply battery . - one heating enclosure containing first heating means carrying a fluid (F) in the vapour state, - a vacuum chamber of vaporised fluid (F) connected upstream of the heating enclosure via a first pipe , - a second intake pipe disposed downstream of the heating enclosure and connecting the latter to a highpressure steam drive enclosure inside which at least one double acting piston is displaced, in an alternating and sealed manner, having a rod and a head on either side of which are defined: * A first compression chamber (C1) connected to a first inlet of vaporised fluid communicating with the second intake pipe and with a first outlet of vaporised fluid, and * a second compression chamber (C2) connected to a second vaporised fluid inlet also communicating with the second intake pipe and with a second vaporised fluid outlet , * A first compression chamber (C1) connected to a first inlet of vaporised fluid communicating with the second intake pipe and with a first outlet of vaporised fluid, and * a second compression chamber (C2) connected to a second vaporised fluid inlet also communicating with the second intake pipe and with a second vaporised fluid outlet , - the rod of the piston being connected to a connecting rod/crank assembly rotating a drive shaft thanks to the alternating linear movement of said rod , - the second intake pipe transporting the vaporised fluid (F) from the heating enclosure to the drive enclosure , - a third exhaust pipe connecting the first and second vaporised fluid outlets and the vacuum chamber , the third pipe transporting the vaporised fluid from the first and second outlets to the vacuum chamber , - the vacuum chamber , the heating enclosure heating, the drive enclosure and the first , second and third vaporised fluid transport pipes forming a closed sealed circuit, and - the first heating means is electrical and is connected to a power supply battery . <EOS>