This generic propeller model includes the full feature tree so you can edit the blade profile, pitch and number of blades. It will therefore also serve as a great teaching aid as not only do you get the model, but since it's a working part file, you also get to see the logic behind how the model was created. You can use this file to modify and re-save as many different sizes as you like. The features are logically named and notes are included in the file properties. Thanks for looking.