Performance of Asymmetric Propellers Under Varying Blade Spacing

Dima Usov, Timotheos Chronis, Antonino Filippone

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper investigates the performance of two-bladed, radially asymmetric propellers with uneven blade spacing during axial flight. The study’s objective is to analyse the impact of blade spacing on thrust, power, and propulsive efficiency in a two-bladed asymmetric propeller. To achieve this, three asymmetric propellers were simulated using the free-vortex wake method, varying blade spacing from 30 to 90 degrees. The study compared the outcomes of the simulations to those of a reference propeller to identify any possible variations in performance. The results indicated only a slight change in overall propeller performance. It was determined that the marginal deterioration in the performance of the propeller was the consequence of the aerodynamic interference effects between the blades, which ultimately offset each other. Therefore, if such propeller geometries offer benefits beyond performance, it is sensible to utilise them.
Original languageEnglish
Title of host publication49th European Rotorcraft Forum
Number of pages10
Publication statusUnpublished - Sept 2023
Event49th European Rotorcraft Forum - Buckeburg, Germany
Duration: 5 Sept 20237 Sept 2023
Conference number: 49


Conference49th European Rotorcraft Forum
Abbreviated titleERF
Internet address


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