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In the paper is given the substantiation of application of multistage wind engines with vertical rotation axis. For this purpose is detected the regularity of variations of instantaneous average values of areas of windward surfaces of vanes for one -, two -, three- and four-stage windwheels. The rational way of equalisation of instantaneous areas of a windward surface obviously is the application of the multistage four-vane windwheel with the deviation phase of sail vanes from each other on an angle . It is proved that at increasing of the stage’s number the uniformity of rotation is increasing proportionate to the square of stage number and also is explained the technique of definition of basic sizes of vane’s sails.

In the paper is described the design and the principle of the operation of the Chain-Wave Transmission (CWT), which uses a multiple-strand roller infinite standard chain and presents analysis of experimental studies results pertaining to the determination of motion trajectories of the chain's roller center of the CWT. A special designed model of the CWT was used to record motion trajectories of the chain roller center, both at the fixed transmitting sprocket and at the fixed interacting sprocket. The analyses of the data confirm the correctness of theoretical conclusions made at graphic and analytical methods of research of the CWT.