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I am trying to model a 3 blade boat propeller, like the one shown in the image. The image was taken from : http://sdshobbyusa.net

3 blade boat propeller, taken from http://sdshobbyusa.net

I wasn't able to come up with a good way to model this propeller. Does anyone know a good technique for modelling this hard surface model with good topology ?

Thank You!


I believe I have gotten the result that I desire. I still need to work on it a little to make it even better. I did it because of PGmath 's help (https://blender.stackexchange.com/users/5705/pgmath) . Thank You!

and

enter image description here

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    $\begingroup$ Model the blades straight and then use a simple deform modifier set to twist. I am working on an answer now. $\endgroup$ – PGmath Oct 18 '15 at 15:02
  • $\begingroup$ @PGmath Thank You for the advice, and thank you for the incoming answer. Can't wait to see it. $\endgroup$ – Viktor Raspberry Oct 18 '15 at 15:12
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    $\begingroup$ @PGmath You are denying speed answers like my a shot at this by calling out the method in the comments! D: $\endgroup$ – GiantCowFilms Oct 18 '15 at 15:20
  • $\begingroup$ @PGmath I found that adding two simple deform modifiers, one for twist and one for bend, produced an OK result, but still not what I want. I am still unable to come up with a solution. $\endgroup$ – Viktor Raspberry Oct 18 '15 at 16:35
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    $\begingroup$ You could also try the extra objects addon, add a "Worm" and play with the settings. $\endgroup$ – someonewithpc Oct 18 '15 at 17:28
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Here's how I would create a propeller like the one pictured.

First create a cylinder and extrude 3 of the faces out and model them into a propeller blade shape. To get decent topology you can extrude along the edge of the blade and then use Grid Fill to fill it in.

enter image description here

Then just add a Simple Deform modifier and set it to Twist, I used an angle of 90°.

enter image description here

Note: in the above example, instead of modeling all three fins at once, I deleted a third of the cylinder and used an Array modifier with the pivot point set to an empty rotated 120°. That way I only had to model one blade.

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