Work in progress 120 mm EDF

thingiverse

I just uploaded the EL-39 and He-162 housing and impellers. The He-162 impeller has a slightly higher pitch than the EL-39 impeller, resulting in more thrust and increased current draw. These parts are designed specifically for HET 800-73-590 motors with 8 mm shafts and 50mm heatsinks. I'm currently working on fan11, which might be the final fan I test if it doesn't outperform fan09. Fan09 has impressive performance numbers: 930 grams at 250 watts and 3250 grams at 1500 watts, thanks to its 300 mm pitch and 13 blades. I'm using Housing05 now, but I don't notice any difference between the various stators. When running the fan, wear protective glasses and ear protection as a precaution. Use a barrier such as a plexiglass plate or wood to prevent injury in case of an explosion. Don't even think about placing your hand near the intake. I haven't tested it to destruction yet, but I expect it to handle 3 kW safely. This fan design has been requested, and I'm making it available now. If you need fans for different shaft diameters, let me know in the comments, and I'll try to accommodate your needs. Alternatively, you can enlarge the shaft hole yourself using a mesh CAD software. Required hardware includes: * M3 grub screws: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575353675&campid=5338226872&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F192290129661 * M3 nuts: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575353675&campid=5338226872&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2FStainless-Steel-316-304-Hex-Thin-Nut-Jam-Nuts-M3-M4-M5-M6-M8-M10-M12-M14-M20-%2F192283251647 * M3x12 bolt for the spinner: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575353675&campid=5338226872&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2FElectrophoresis-Black-304-stainless-M3-M4-M5-Countersunk-hex-socket-screws-%2F192355246804 * Cheap motor that MIGHT work: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575353675&campid=5338226872&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F302621377586 Made for 5mm motor shaft. Use m3 nuts and M3 grub screws of at least 10 mm length to secure the fan to the motor shaft. The shaft needs to have a flat spot. Don't overtighten it, or the fan can wobble. Use M3 rub screws in the holes around the fan hub to balance, or drill out the holes to reduce weight. Secure the spinner with an M3 screw. Glue Housing02 onto Housing01 or Housing05 with CA. Housing05 has angled stators to handle torque better and examine the effect of a gradual interaction between the blades and stators. It only goes on one way. Motor diameter up to 50 mm with screw distance 25 mm (Neumotor 19xx series). Sand the inside diameter of the duct if the fan rubs excessively. Very slight rub will wear in when you spin up. 120-teststand02 can be stuck to a kitchen scale top with double-sided tape, or to 120-teststand01 if your scale has the same kind of threads mine does. The holes are oversize because I just resized the stand from my 70 mm experiments and didn't bother changing them. With Fan02, 8S lipo, and Neumotor 1907/2Y motor: * 910 grams at 250 watts * 1500 grams at 500 watts * 2000 grams at 750 watts * 2500 grams at 1000 watts * 3600 grams at 1700 watts full throttle.