Work in progress 120 mm EDF

thingiverse

EDIT - 28.06.2019: I uploaded the actual housing and impellers for my EL-39 and He-162 designs. The He-162 impeller has a slightly higher pitch than the EL-39 impeller and gives more thrust and higher current draw. These parts are designed for HET 800-73-590 motors with 8 mm shafts and 50mm heatsinks. ---------- EDIT - 27.03.2018: I just uploaded fan09, which is the ninth fan I tested. It has the best performance so far. 930 g @ 250 W and 3250 g @ 1500 W. 300 mm pitch and 13 blades. I'm using Housing05 now. I don't measure any difference between the different stators. Currently working on fan 11, which might be the last fan I test if it doesn't do better than 9. ----- Wear protective glasses and ear protection when running the fan. Use something between your body and the fan when running it at high power levels to prevent injury if it should explode, like a plexiglass plate or wood. Don't even think about holding your hand in front of the intake. I have not tested it to destruction yet, but expect it to handle 3 kW safely. I'm making this available now because it was requested. If you need fans for different shaft diameters let me know in the comments and I will try to accomodate. Alternatively you can enlarge the shaft hole yourself in a mesh cad software. Fan01: 12 blade fan. Fan02: 11 blade fan. Fan03: 12 blade fan with slightly different blades. Fan04: 12 blade fan. New blades again. 360 mm pitch. Fan05: 12 blade fan. CFM Leap fan imitation (Boeing 737 Max) 360 mm pitch. This was crap! Required hardware through my affiliate links: 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%2F12-9-M3-M4-M5-HEX-socket-cap-screw-Carbon-steel-Allen-key-machine-screw-%2F192238803920 Countersunk motor mounting bolts: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 f threads mine does. The holes are oversize because I just resized the stand from my 70 mm expriments and didn't bother changing them. With Fan02, 8S lipo and Neumotor 1907/2Y motor: 910 g at 250 W 1500 g at 500 W 2000 g at 750 W 2500 g at 1000 W 3600 g at 1700 W full throttle.