PROPELLERS

Gestartet von Rowen vor 9 Jahren

4 Antworties 4 gefällts 0 Follower Letzte Aktivität: vor 9 Jahren

PROPELLERS

I would add the little Wattmeter, which also tells you the max current drawn, to that 'Equipment List' John.
Cheers Doug 😎

Young at heart 😉 Slightly older in other places.😊 Cheers Doug

Gefällt von Donnieboy

#4 vor 9 Jahren

PROPELLERS

I can only say what I always say. Experiment. A tachometer and a spring balance would be all you should need I think.

Gefällt von RNinMunich

#3 vor 9 Jahren

PROPELLERS

Thanks Doug. Always thought, my old mathematics text books would come in useful!
Was hoping for was a simple chart of speed vs thrust, recognizing there are many factors that influence them. Even a max speed and efficiency rating would help.
R

#2 vor 9 Jahren

PROPELLERS

Evenin' Rowen, not surprised they don't publish charts, it ain't so easy!
Here's the theory and maths! 😲

https://en.wikipedia.org/wiki/Propeller#Propeller_thrust

happy integrating! Maybe when you're done you can sell them the charts😉
Cheers Doug 😎

Young at heart 😉 Slightly older in other places.😊 Cheers Doug

Gefällt von reilly4 and Donnieboy

#1 vor 9 Jahren

PROPELLERS

Does anybody have any performance charts or operating information for Raboesch propellers?
Am looking for the rpm vs thrust relationship for the under 45m/m 3 blade sizes particularly, but anything would help.
My traditional supplier cannot help and neither does the web site.
Am trying to plan a future models and would like to be rather more scientific than the "if it fits it will work" approach or just using the motor O.D. as a guide to the propeller diameter.

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