Included the SOLIDWORKS File for the rotor and for slightly longer axis. I use brim with no clearance inside and outside but you might not need it. Prints very well in PLA on a Bambu Lab P1P.

Many thanks to Meister Edel for the original model.

https://www.printables.com/model/394700-toroidal-rotor-4-strong-flying-propeller

Completely unrelated: The Vertical Decor Collection:

• Slender Striped Vase: https://makerworld.com/en/models/91147#profileId-97491
• Fat Striped Vase: https://makerworld.com/en/models/91133#profileId-97479
• Candleholder Tall: https://makerworld.com/en/models/91168#profileId-97509
• Candleholder Short: https://makerworld.com/en/models/91158#profileId-97497
• Candleholder Double: https://makerworld.com/en/models/91181#profileId-97517
• Tissue Box Holder with Bottom Lid (Scotties): https://makerworld.com/en/models/73097#profileId-77641
• Tissue Box Holder without Bottom Lid (Scotties): https://makerworld.com/en/models/73057#profileId-77633
• Tissue Box Holder without Bottom Lid (Kirkland): https://makerworld.com/en/models/67057#profileId-70913
• Weightless Spheres: https://makerworld.com/en/models/99069#profileId-105629
• Weightless Teardrop Vase: https://makerworld.com/en/models/106259#profileId-113422
• Downhill Skier Skier Door Frame Topper: https://makerworld.com/en/models/106214#profileId-113390
• Tail-grabbing Skier Door Frame Topper: https://makerworld.com/en/models/126631#profileId-136909
• Climber Door Frame: https://makerworld.com/en/models/138127#profileId-150395

Also:

• Ringosaurus bigger and deeper: https://makerworld.com/en/models/57828#profileId-59525
• Unlocked Level Cake Topper: https://makerworld.com/en/models/104796#profileId-111855
• Biggest Gift Box: https://makerworld.com/en/models/84040#profileId-89836
• Large Copter Propeller: https://makerworld.com/en/models/64664#profileId-67877