17" vs. 15" props video. Voltage comparison

[photojunky]

 

[Av8Chuck]

There are a ton of variables and things to consider trying to figure out the efficiency of a prop/motor combination.

If your interested in learning more about this you can check out:

https://www.rcgroups.com/forums/sho...opeller-efficiency-testing-with-a-dynamometer

And:

https://www.rcbenchmark.com/

 

[photojunky]

Great link, fascinating, and I know those guys have some big brains. I wonder how their tests would compare to real world use. That would also be an interesting test. Kind of wish they were using a similar motor and prop to what I just used. the biggest prop they used was a 14 inch. Very cool.

 

[Av8Chuck]

We have the same setup and it's really close to real world flying. We changed our setup to do bigger 18" props.