6 blade Fan Prop 30cm

thingiverse

This is a 2Watt, 800RPM push blower for my beer can Stirling engine. It efficiently pushes a good amount of air while maintaining silent operation. The blower works optimally with six blades, but could also function with three or four. The spinner primarily serves for aesthetic purposes rather than aerodynamics, as it was designed from CH10SM airfoil data with slightly modified angles for lower power and speeds. If you're looking for a specific use for this fan, it performs best under 1000 RPM, at low power, and with accelerations. Unfortunately, it is not ideal for flight due to its design. However, it works well as a directional fan with an efficient narrow air flow several meters away. This blower may not be optimized for practical use, but it's perfect for general home purposes. To assemble the parts, position them upright and add support where necessary. Print the parts and clean any support structures. Use a temperature-controlled soldering tip around 240°C to solder the pieces together, increasing the temperature to 260-300°C for faster results. Sand the blades for a smoother surface before attaching them to their bases. Adjust the blade angles so they are level and attach an M4 nut to secure the axle and spinner in place. Attach all the blades to the hexagonal part using epoxy, superglue, or soldering tip heat. Finally, attach the spinner to complete the look and ensure free rotation. This propeller is currently working with a prototype engine at approximately 600 RPM, moving a fair amount of air. The STL file quality may not be perfect, but it can be converted if needed. The original model also requires improvement, but the creator does not plan to develop this prop further.