The higher end 3D printing service printers, typically Stereolithography printers, should not require any post print clean up. Some post print clean up will be required if you are using one of the common lower cost fused filament 3D printers. ABS can be easily sanded and an application of acetone after sanding provides a nice smooth finish. If printing the propellers yourself, we have found that using ABS plastic as opposed to PLA works the best. If you have a 3D printer or want to use a 3D printing service, hopefully you will find these propellers and spinners to be suitable for your applications. This pitch distribution has been found through dynamic ground testing as well as on test models to work very well for the class of models contained in the Free Flight plans section of this site.īoth two and three bladed propellers are provided with diameters of 5.5', 6', 7', and 7.5' along with suitable spinners. The P/D then increases linearly to a value of 1.8 at the tip. Each prop that is presented here uses a pitch to diameter ratio of 1.2 from the hub out to the 75% point of the blade radius. The props have been developed using hypotwist pitch distributions as described by Bruce Holbrook in an article that is available from the National Free Flight Society Technical Library. Presented here are some propellers that can be created using a 3D printer.
