I put coils inside the base of the propeller, and put a cap on it to create the propeller wings to attach to the cap.

https://app.pluralsight.com/player?course=maya-modeling-fundamentals&author=justin-marshall&name=maya-modeling-fundamentals-m4&clip=2&mode=live

https://app.pluralsight.com/player?course=maya-modeling-fundamentals&author=justin-marshall&name=maya-modeling-fundamentals-m4&clip=1&mode=live