Need Help with Cycloidal Propeller Theory

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SUMMARY

The discussion focuses on modeling a cycloidal propeller, specifically addressing the mechanics of achieving a 90-degree blade position when the socket is aligned with the horizontal axis. The user seeks advice on the appropriate lever system to facilitate this configuration. Key advantages of cycloidal propellers include their ability to provide thrust in any direction quickly, making them ideal for tugboats and ferries, while their disadvantages include lower maximum speeds compared to standard screw-type propellers.

PREREQUISITES
  • Understanding of cycloidal propeller mechanics
  • Familiarity with SolidWorks for CAD modeling
  • Knowledge of lever systems and mechanical linkages
  • Basic principles of marine propulsion systems
NEXT STEPS
  • Research the design principles of cycloidal propellers
  • Explore SolidWorks tutorials focused on mechanical assemblies
  • Study the advantages and disadvantages of various marine propulsion systems
  • Investigate the application of lever systems in mechanical design
USEFUL FOR

Marine engineers, CAD designers, and anyone involved in the design and optimization of propulsion systems for marine vessels.

Harrison S
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Trying to figure out how to model a cycloidal Propeller. Here is the concept I am using. http://www.rexresearch.com/voight/propbew2.gif

When the Socket (left side) is on the axis, the propeller blades to the left or right are at 90 degrees. As long as this socket is on the axis the blades on the axis will be at 90 degrees. What kind of Lever system do i need so that when my version's socket is on the horizontal axis, the blades will be at 90 degrees? Any Ideas? I have attached a partial solidworks Assembly. Also, here is the interactive animation showing one of these working.
http://users.telenet.be/sleepbedrijf/VoithSchneiderPropellerDemoProgramm3%5B1%5D.swf

Here is the link to my solidworks forum thread with my incomplete cad model.

https://forum.solidworks.com/thread/61614?tstart=0
Harrison

*edited
 
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Harrison S said:
Trying to figure out how to model a cycloidal Propeller. Here is the concept I am using. http://www.rexresearch.com/voight/propbew2.gif

When the Socket (left side) is on the axis, the propeller blades to the left or right are at 90 degrees. As long as this socket is on the axis the blades on the axis will be at 90 degrees. What kind of Lever system do i need so that when my version's socket is on the horizontal axis, the blades will be at 90 degrees? Any Ideas? I have attached a partial solidworks Assembly. Also, here is the interactive animation showing one of these working.
http://users.telenet.be/sleepbedrijf/VoithSchneiderPropellerDemoProgramm3%5B1%5D.swf

Harrison

Welcome to the PF.

That's a pretty fun interactive animation. :smile: What are the advantages and disadvantages of this type of ship propeller versus a standard screw type?
 
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This kind of propeller is used on tugboats, ferry's and was used during world war 2 on mine disposal ships. It allows transference of thrust in any direction in only a few seconds. Ferry's can spin 180 degrees to unload cars quickly, mine disposal ships can avoid mines, tugboats can pull a ship in any direction and can maneuver quickly to avoid collisions. It is also much more durable than most other types of propulsion and has a long life expectancy. This propulsion device also helps with reducing the roll in rough seas.

The disadvantages are that it has a lower maximum speed compared to standard propulsion drives of the same horsepower. This means that it is not as effective for the main propulsion for extremely fast crafts, or freighters. However, the cylcloidal propeller would be great as a second propulsion unit to help with docking or manuevering.