| 摘要 |
The method involves arranging counterweights (40, 50, 60, 70) on a set of locations. The locations are located on hub envelopes (22, 32) close to ends (22A, 22B, 32A, 32B) of the hub envelopes that are distant from planes (B-B', C-C') of a set of coaxial non-streamlined contrarotating propellers (2, 3). A position of the counterweights is arranged orthogonal to axes (A-A') of the contrarotating propellers. The counterweights are arranged in a set of respective cavities. An independent claim is also included for a propulsive system.
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