FREQUENCIES OF THE ALTERNATING FORCES DUE TO INTERACTIONS OF CONTRAROTATING PROPELLERS

Somewhat to our surprise, we have not found any published discussion of the frequencies of the fluctuating forces developed by interactions between a pair of contrarotating propellers. Although the calculation of the expected frequencies of the alternating thrust and torque is straightforward, the calculation for side forces involves sufficient subtlety to warrant documentation. This Note is concerned with the frequencies of the forces only, and not with their magnitude. Nevertheless, it becomes apparent during the determination of frequencies that the fluctuating interaction forces are zero for certain combinations of the blade numbers of the two propellers.

• Corporate Authors:

  American Institute of Aeronautics and Astronautics

  1290 Avenue of the Americas
  New York, NY  United States  10019
• Authors:
  • Strasberg, M
• Publication Date: 1976-4

Media Info

• Pagination: p. 62-64
• Serial:
  • Journal of Hydronautics
  • Volume: 10
  • Issue Number: 2
  • Publisher: American Institute of Aeronautics and Astronautics

Subject/Index Terms

• TRT Terms: Contrarotating propellers; Force; Propellers
• Old TRIS Terms: Propeller induced forces
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00141471
• Record Type: Publication
• Source Agency: American Institute of Aeronautics and Astronautics
• Files: TRIS
• Created Date: Oct 26 1976 12:00AM