RC boat water jet propulsion - complete open source

thingiverse

I am try to create new another water jet boat propulsion for RC models. Actual version used on by boat is "v12" It is complete open source (only for non-commercial use, another license on request) **Do not hesitate to add comments about this design. Do not forget read comments, it contain many useful informations.** Designed for approximately 1m model boat. Printed from PLA except impeller from PETG. It need 5x5mm M3 brass inserts. Insert in "jetRudler_v12.stl" are drilled by 3.2 drill. OpenSCAD sources for v12 is here: https://gitlab.com/jdobry/waterJet/tree/v12 NOTE: impeller lead isn't optimal for jet efficiency. It is too big. But it is optimal to print it. I don't test other lead/pitch values. It is good enough for my funny boat just for fun. mainPart and motorHolder need to be glued together. Do it **ONLY** with mounted shaft to the motor together not without it. It is necessary to have motor and shaft perfectly concentricall. I am using <a href="https://www.aliexpress.com/item/RC-hobby-radio-control-boat-brushless-motor-with-ESC-power-system-combo-3536-1700KV-125A-ESC/32834812368.html">3536 1700KV motor+ESC combo</a> (re-flashed by <a href="https://github.com/sim-/tgy">SimonK firmware</a> O_POWER=470; O_GROUND=47; POWER_RANGE=1600*CPU_MHZ/16+MIN_DUTY) with 6000mAh 40C 3S LiPol battery. Result is 80A (930W) measured electric power. EDIT(2018-11-03): This motor is little bit overloaded and after few hours it is dead. Currently I have plan replace it by 3674 inrunner with water cooling jacket. 2018-06-06: add more informations 2018-06-05: first public "final" version v12 2018-06-02: Real boat test https://youtu.be/jG33dKuQeQY 2018-05-26: 3rd test https://youtu.be/VpkvRb1sVZo 2018-05-12: first test https://youtu.be/7qWh_Ipw2Fk https://photos.app.goo.gl/55UOe9A346dyhPs23