Setting Up a Mechanical/Electrical Inertia Measurement of Propellerarm

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SUMMARY

This discussion focuses on setting up a mechanical or electrical inertia measurement system for a rotating propeller arm, specifically while the thrust (RPM of the propeller) is increasing. The user, George P., seeks suggestions on utilizing tools such as force springs, pendulums, or timers for this setup. The primary goal is to experimentally demonstrate the relationship between thrust and inertia for a flight robot with omnidirectional capabilities. Clarifications on the definitions of inertia and the methods of increasing thrust, such as motor power modulation or pitch adjustment, are also requested.

PREREQUISITES
  • Understanding of mechanical inertia and its measurement techniques
  • Familiarity with propeller dynamics and thrust generation
  • Knowledge of experimental setup involving force springs and pendulums
  • Basic principles of flight robotics and drone design
NEXT STEPS
  • Research methods for measuring mechanical inertia in rotating systems
  • Learn about thrust generation techniques in propellers, including pitch modulation
  • Explore the use of force springs and pendulums in experimental setups
  • Investigate the design principles of omnidirectional flight robots
USEFUL FOR

This discussion is beneficial for aerospace engineers, robotics developers, and researchers involved in drone technology and experimental physics related to propulsion systems.

Ginorizz0
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TL;DR
how to setup a teststand for rotating propellerarm with rising rpm of the propeller.
Hello Everybody
I'd like to set up a mechanical or electrical inertiameasurement of a Propellerarm that is in rotation, while the thrust (rpm of propeller) is rising.
Maybe with a forcespring, a pendulum, camera (timer)...
Not sure how to set it up nicely. Any suggestions?
Best
George P.
 
Engineering news on Phys.org
Welcome to PF. :smile:

Ginorizz0 said:
TL;DR Summary: how to setup a teststand for rotating propellerarm with rising rpm of the propeller.

Hello Everybody
I'd like to set up a mechanical or electrical inertiameasurement of a Propellerarm that is in rotation, while the thrust (rpm of propeller) is rising.
Maybe with a forcespring, a pendulum, camera (timer)...
Not sure how to set it up nicely. Any suggestions?
Best
George P.
Can you say more about what you are wanting to do? Is this for some sort of wind farm turbine, or for a wind tunnel, or for some other application? The more details you can provide, the better we can help you.
 
Ty:)
The general question is: Does the rising thrust of the propeller change the inertia of the whole propellerarm.
Its about a flightrobot with omnidirectional abilities, but first i'll need to show experimentally the thrust to inertia-relation. In the end i'll actuate the arm with the right drive.
 
Sorry, I'm still not clear on what you want to do. When you say the "thrust is rising", is it rising because you are increasing the motor power to the propeller? Or are you modulating the pitch of the propeller to increase the thrust? (or both?)

Also, can you please give a mathematical definition of what you mean by "inertia" in this context? I'm guessing you mean something other than the traditional definition of the Moment of Inertia...

Are you designing a drone?

Drones-strategy-2.0-FEATURED-image-LIGHT_0.png

https://www.easa.europa.eu/en/light/topics/drones
 

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