Abstract: A downhole motor includes a bearing unit connected to a moving section incorporating successively arranged working members--a stator and a rotor interacting with each other along profile surfaces. The like pairs of the adjacent working members are rigidly connected to each other by means of solid threaded bushings. A mounting fixture includes two mounting elements each made as two bushings interconnected by a coupling, the bushings having their profile surfaces located on the same longitudinal axis. One of the bushings is rigidly connected to the coupling, while the other bushing is mounted with the possibility of moving with respect to the longitudinal axis. A method of assembling the downhole motor is effected with the use of a pre-adjusted mounting fixture and resides in interconnecting the like working members by thread bushings ensuring the arrangement of the profile surfaces of the working members analogously to the profile surface of the single monolithic rotor and stator.

Abstract: An ejector-type engine thrust augmentor intended for use in aircraft, e.g. in agricultural aviation. The thrust augmentor comprises an ejector shroud and a shell in the form of a truncated cone. The shell is located between the nozzle and the ejector shroud. The large-diameter inlet section of the shell faces the outlet section of the nozzle whereas the small-diameter outlet section of said shell faces the inlet section of the ejector shroud. The shell has longitudinal slots spaced at equal distances from one another. Due to the efflux of air from the longitudinal slots the stream flowing out of the nozzle acquires a complex cross section with a large surface area. This increases considerably the thrust increment with substantially smaller size and weight of the thrust augmentor.