Setting Up a Mechanical/Electrical Inertia Measurement of Propellerarm

[Ginorizz0]

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.

 

[berkeman]

Welcome to PF.

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.

 

[Ginorizz0]

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.

 

[berkeman]

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?

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