Airplane Propeller Macro

[Russ4262]

Anyone working with FC for purpose of airplane propellers? I busted a propeller for an ultralight a while back and have been working on a macro to automate the design process. I started with the airfoil import and the parametric curve macros as a basis. I have made good progress. The macro seems stable for DWire basis, but I have not completed the BSpline side of the code - mainly because I am happy with the DWire results. The small boxes on the end of the blades are placeholders for blade tips (to be added).

I am also working with the Path 3D Surface operation. I have made some modifications to the existing script to include layering (StepDown) support and additional optimization based on layer height.

I am attaching a screenshot and including a link below to the source FC file for the propeller macro result.
https://drive.google.com/open?id=1MS3nA ... quY5hO00q2

Thanks,
Russ

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15860 (Git)
Build type: Release
Branch: master
Hash: 3b708c7f84b0425076b520e1d95627b20fd75fe0
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: English/UnitedStates (en_US)

[bill]

I could probably use the same for my boat propeller!
I would recommend posting this in the USER SHOWCASE also; where there is more visibility and interest!

[m.cavallerin]

Hi,

can you share your code? I'm interested to understand how you interpolate the foils' sketch.

I'm also working on something similar for foil generation for wings; please look at:

https://github.com/mcavallerin/airFoil_tools
Some screen shots attached.

At the moment it works better with Assembly3 appImage:
https://github.com/realthunder/FreeCAD_ ... 3/releases

Regards.

Michele

[Kunda1]

You may want to give the dev over at https://github.com/FredsFactory/FreeCAD_AirPlaneDesign/ a heads up. Perhaps a collaboration ?