Hello
I want to draw a propulsion propeller with the following constraints:
Diam: 63cm
Blade Quantity: 3
Motor power: 500W
Travel speed: 8km/h
RPM: 1000
Weight: 120kg
question
1) do the constraints really relay the propeller (500W seems fallible to me)?
2)how to model it souys CATIA v5
Thank you
Hello
For the modeling, here is a practical work in pdf:
https://moodle.insa-toulouse.fr/pluginfile.php/14485/mod_folder/content/0/TP_helice_BATEAU.pdf?forcedownload=1
Otherwise, you already have information here ;-):
http://www.lynkoa.com/forum/3d/modelisation-d-une-helice-sous-catia-v5
And for a power calculation, there's a calculator here:
http://www.csgnetwork.com/marinepropcalc.html
Be careful, these are imperial measurements (inch).
Re
Could 500W run this in water?
Thank you
Hello
On second thought (see your previous question), will the propeller rotate in the water? Yes.
If the torque at 1000 RPM is only 5 N.m, it is not a big deal because the boat is already launched. The force required to keep it moving no longer needs to be significant.
At start-up, the torque being inversely proportional to the speed, you recover 500 N.m at 10 RPM. So here it's much more effective.
The question that can possibly be asked is how quickly will 1000 RPM be reached. And again, it can be calculated quite easily once you have the moment of inertia of your propeller.