losses do exist throughout the machine further of course the machine will operate only for a given period of time until the air pressure within the storage chamber has been reduced this taking a number of minutes or hours depending upon a number of parameters relative to the elements described above with respect to the spiral air motor based on the examples given the velocity of the air ejected at port or opening of sleeve 138 is sufficient to cause air at a lower pressure within the low pressure manifolds 20 to be inducted that is picked up and driven by the primary air passing through sleeve 138 for common discharge at the oblique or inclined opening 114 of tube 120 against the blades 110 and 112 of impellers 94 the velocity of the air decreases rapidly after impact with impellers 110 and 112 while the pressure increases and while the air within the low pressure air accumulator chamber 52 also decreases with time initially air will build up within that chamber to approximately 700 psi after a period of time as the air expands and is discharged from the high pressure air storage chamber 54 its pressure will be reduced to the extent that butterfly valve 158 may be opened as shown fig1 permitting fluid communication between chamber 54 and the low pressure manifold tubes 130 the invention has been shown in terms of an air motor which is mounted for pivoting about a vertical axis that is the rotation of turntable 30 relative to base plate 26 on the ball bearings 28 this permits the machine to be positioned so that its output shaft is oriented with respect to an end use.