Powering Propeller with Pulley

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    Propeller Pulley
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SUMMARY

The discussion focuses on creating a system where a string on a pulley supplies continuous power to a propeller, allowing for repeated pulls without interrupting its rotation. A bicycle gear mechanism is suggested as a viable solution, enabling gear changes on-the-fly. Additionally, the concept of a continuously variable transmission (CVT) is introduced, which utilizes a pulley system over a cone shape to achieve smooth gear transitions. The use of a governor to adjust the pulley position based on axle speed is also mentioned as a potential enhancement.

PREREQUISITES
  • Understanding of pulley systems and their mechanics
  • Familiarity with continuously variable transmission (CVT) technology
  • Basic knowledge of gear mechanisms, particularly bicycle gears
  • Concept of governors in mechanical systems
NEXT STEPS
  • Research the mechanics of continuously variable transmissions (CVT)
  • Explore the design and implementation of pulley systems in mechanical engineering
  • Study the principles of gear shifting in bicycle gear systems
  • Investigate the role of governors in regulating mechanical systems
USEFUL FOR

Engineers, hobbyists, and inventors interested in mechanical design, particularly those focused on propulsion systems and gear mechanisms.

dislect
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Hi everyone!

I want a string on a pulley to supply the power for the propeller, meaning i pull the string and the force is transformed to the propeller. I was wondering how could i create the system so that i can pull the string time after time and give the propeller more power (keeping somewhat of a constant speed and not just a one time pull) without stopping or disturbing its rotation.

any ideas? thanks !
 
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dislect said:
Hi everyone!

I want a string on a pulley to supply the power for the propeller, meaning i pull the string and the force is transformed to the propeller. I was wondering how could i create the system so that i can pull the string time after time and give the propeller more power (keeping somewhat of a constant speed and not just a one time pull) without stopping or disturbing its rotation.

any ideas? thanks !

A gear mechanism akin to a bicycle gear setup would accomplish this. Start off in low gear, once it gets up to speed, you switch gears on-the-fly.

There are transmissions that use a continuous, fluid movement to gear up, rather than the chunkiness of gears. I can't remember what they're called. Instead of gears, they use a pulley over a sort of cone-shape. Some autos of yore had this.

You could have a governor that fed back into the system so that, as the axle sped up, it would cause the pulley to move from the small end of the cone to the large end. Durr... technical terms escape me right now
...

Here's a concept:
[PLAIN]http://blog.arwdesigns.com/pics/CVT/CVT1.jpg
 
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