RC Plane Folding Propeller 6 to 9 inch

thingiverse

EDIT 2020.01.31: Added a more robust Version of each centerpiece. From my and others expierience, the weakest point of the propeller was the areas around the screwholes in the centerpiece. Of each centerpiece, I designet a version called "Centerpiece_robust" with the weak area enforced by 60% material thickness. Have fun! EDIT 2019.04.20: I have upscaled the 8.5 x 7.5 version to 130% and tested it on a Pylon Racer / Hotliner with 600 Watts (Red plane in the Pictures.) Worked really well! EDIT 2019.04.19: Added Spinners with 2mm and with 3mm mounting hole. EDIT 2019.04.06: Tested the 8.5 inch blades until they failed. It took an astonishing 1000 Watts and well over 18'000 rpms to destroy them! That's impressive. Caution: This test was done at room temperature and with fresh PLA. Be aware that the maximum load will decrease significantly over time, at different temperatures or with other materials! Video: https://www.youtube.com/watch?v=5OvdSDFOB-g ________________________________________________________________ EDIT 2019.04.03: Added 3-Blade centerpieces with 5mm, 6mm and 8mm hole. Tested the 8.5 x 7 blades on a fast plane yesterday, worked very well @ 180 Watts. (3S LiPo, 17 Amps) ________________________________________________________________ EDIT 2019.04.03: Added STEP-File Corrected orientation of the centerpieces and the prop blades. Now, all the parts are saved in correct orientation, ready to print. Print the blades with supports on! ________________________________________________________________ EDIT 2019.04.02: Added a Centerpiece with 6mm hole. Added pitch information to the file names of the blades. Added some higher pitch blades. Also I have measured the geometric pitch of the original blades in my CAD and it seems to be slightly more than I originally wrote. Now, there are the following blades included: - 6 x 3.5 - 6 x 5 - 7 x 4 - 7 x 6 - 8 x 5 - 8 x 7 - 8.5 x 5.5 - 8.5 x 7.5 - 9 x 6 - 9 x 8 ________________________________________________________________ Original Text: Just another folding propeller. There are various blades from 6 to 9 inch (prop diameter, not blade length) in the files. I use the 8.5 inch version which works very well. The pitch should be around than half the diameter. So with the 8 inch blades, it has around 4 inches pitch Caution: This propeller is not designed for high power motors. I disclaim liability for any damage caused by this propeller. At 12'000 rpms, the tip reaches over 500 km/h which will hurt if you get hit... Test it carefully and don't stand in front of or nearby the propeller while testing. I suggest testing it with more power than it will be running in your airplane. I have tested the 8.5 inch blades up to 350 watts of electrical input power without any demage. Theres also a more robust version of the 8 inch blades and the center hub in the files which should be good for over 350 watts. Print with 100% infill and 3-4 perimeters.