Amazon.com: uxcell RC Propellers CW 8040 8x4 Inch 2-Vane Fixed-Wing for Airplane Toy, Nylon Orange 10pcs with Adapter Rings : Toys & Games
The Propeller Handbook: The Complete Reference for Choosing, Installing, and Understanding Boat Propellers: Gerr, Dave: 8601409893754: Amazon.com: Books