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SAE ARP355

Revision B, December 1, 2013

Complete Document

Terminology of Dual and Coaxial Counter-Rotating Propellers

Includes all amendments and changes through Stabilization Notice (No longer revised / updated) , December 2013


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Product Details:

  • Revision: Revision B, December 1, 2013
  • Published Date: December 2013
  • Status: Active, Most Current
  • Document Language: English
  • Published By: SAE International (SAE)
  • Page Count: 2
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

This document provides definitions pertaining to dual and coaxial counter-rotating propellers.

1. Dual Rotation Propellers or Dual Rotation Propeller Shafts - The concentric arrangement in which each component of the propeller rotates in an opposite direction at the same speed because of a fixed gear ratio between shafts.

2. Coaxial Propellers and Coaxial Propeller Shafts - The concentric arrangement in which each component of the propeller rotates in an opposite direction wherein the speed of each component can vary independently because no fixed gear ratio is incorporated between the shafts.

3. Counter Rotating Propellers and Propeller Shafts - The airplane arrangement in which shafts and propellers rotate in opposite directions but in which the shafts are not concentric.

4. Inboard Component - The component of a dual rotation or coaxial propeller which is mounted on the inboard shaft. (Nearest to power source)

5. Outboard Component - The component of a dual rotation or coaxial propeller which is mounted on the outboard shaft. (Farthest from power source)

6. Designation of Number of Blades - The number of blades of a dual rotation or coaxial propeller shall be designated as the total number in both components.

AIA/NAS Aerospace Standards