3 inch Prop Duct

thingiverse

Prop Duct for 3 Inch Props. This design is tailored to fit the Acrobrat frame but may work with other frames as well. Please note that I've uploaded this design at the request of many viewers who have seen images of my ducted-brat setup online. You might need to trim some fouling on the frame before use. For optimal results, use 4-inch bullnose props or cut down 4-inch props to fit. Your printer settings may require sanding the internal diameter for a tight fit. I recommend it that way to ensure maximum performance as any gap between the duct and prop reduces its efficiency. Please let me know your thoughts on this design or if you've used the ducts. **PS - For some reason, my designs often export from Fusion360 in the wrong orientation. You can easily rotate them and print 'base down' without supports.