An apparatus of a gas turbine for the purpose of converting the pressure and temperature energy of a gas into rotational kinetic energy of a turbine; through an axial injection of such gas into the center of flat disks to perform work as the gas moves outward in one or more spirals cut out of these flat disks; such that the gas experiences a gradual release of pressure along the length of the spirals as the gas presses down on the width and length of the spiral; with the spiral being of many turns such that the radius of the spiral is a prescribed increasing function of turns of the radius; and the spiral has a long length in the order of a meter, a moderate width in the order of a centimeter, and a shallow depth being a small fraction of a millimeter.