Changes

Summary

1. initial propeller efficiency model (details)
2. modify tests (details)
3. initial qprop (details)
4. Add prop structure and performance models (details)
5. Add prop structure and performance models (details)
6. Updated propeller to base and performance class (details)
7. update units tests to include prop model (details)
8. Changes per mike's review (details)
9. small changes (details)
10. remove qprop (details)
11. add static model in (details)
12. add missing __init__.py (details)
13. update prop unit test (details)

initial propeller efficiency model

modify tests

initial qprop

Add prop structure and performance models

Add prop structure and performance models

Updated propeller to base and performance class

update units tests to include prop model

Changes per mike's review

small changes

remove qprop

add static model in

add missing __init__.py

update prop unit test