A charged particle jet engine device comprising: a plurality of electrodes connected to at least one electrical power source; at least one of said electrodes (3, 4), when immersed in a gaseous medium, being configured to allow the medium to pass through or around it; wherein the size, shape, and position of the electrodes (3, 4) in the medium create different regions of the medium used by the device; low energy charged particles introduced at any point in said medium or separated from other charged particles that are already in the medium such that the majority of charged particles in a region are of one polarity; wherein these charged particles are accelerated by one or more electric fields produced by potential differences between electrodes; wherein the accelerated charged particles travel a distance in the medium such that the number of collisions of said accelerated charged particles with atoms and/or molecules of the medium result in the transfer of energy and momentum from the charged particles to the neutral atoms or molecules; wherein the total mass of the neutral atoms and/or molecules that collide with the charged particles exceeds the total mass of the charged particles; wherein the energy and momentum of the neutral atoms and/or molecules that have collided with the accelerated charged particles exceeds the energy and momentum of the accelerated charged particles after leaving the region of the device where the charged particles were accelerated; wherein all electrodes where the charged particles are neutralized after reaching and/or passing through or around said electrodes are defined as exit electrodes; and wherein at least two of the electrodes establish an electric field and characterised in that means are provided to reduce the axial space charge generated electric field produced when charges are between the electrodes. a plurality of electrodes connected to at least one electrical power source; at least one of said electrodes (3, 4), when immersed in a gaseous medium, being configured to allow the medium to pass through or around it; wherein the size, shape, and position of the electrodes (3, 4) in the medium create different regions of the medium used by the device; low energy charged particles introduced at any point in said medium or separated from other charged particles that are already in the medium such that the majority of charged particles in a region are of one polarity; wherein these charged particles are accelerated by one or more electric fields produced by potential differences between electrodes; wherein the accelerated charged particles travel a distance in the medium such that the number of collisions of said accelerated charged particles with atoms and/or molecules of the medium result in the transfer of energy and momentum from the charged particles to the neutral atoms or molecules; wherein the total mass of the neutral atoms and/or molecules that collide with the charged particles exceeds the total mass of the charged particles; wherein the energy and momentum of the neutral atoms and/or molecules that have collided with the accelerated charged particles exceeds the energy and momentum of the accelerated charged particles after leaving the region of the device where the charged particles were accelerated; wherein all electrodes where the charged particles are neutralized after reaching and/or passing through or around said electrodes are defined as exit electrodes; and wherein at least two of the electrodes establish an electric field and characterised in that means are provided to reduce the axial space charge generated electric field produced when charges are between the electrodes.