Fully Printable Fixed Pitch RC helicopter.

cults3d

Disclaimer: Beware of high-speed rotating components. Inadequate printing or assembly, or subpar materials, may result in problems. Centrifugal forces exerted by the blades will reach 70 N during flight, but these forces are not harmless if an object shatters. The motor used in the prototype is insufficient to propel the body with adequate speed, but it flies well without the body attached. I am still refining the design. The flybar version is notably sluggish and requires improvement. https://youtu.be/bGzuMBU8KG0 Required hardware: Three 75mm main shafts are required. These should be made from carbon rod or steel to ensure durability. No drilling is necessary for this task. Two 3x6x2.5mm ball bearings are needed for the main shaft: https://www.banggood.com/Orlandoo-F150-OH35P01-KIT-Parts-30625-Ball-Bearing-TA0009-p-985250.html?p=HD240528697332015103 One 10x15x4mm ball bearing is needed for the swash plate: https://www.banggood.com/FS-Racing-FS-53910-FS-53625-6PCS-582002-Roll-Bearing-10x15x4mm-110-RC-Car-Parts-p-1153527.html?p=HD240528697332015103 Various #0 screws or similar self-tapping 1-1.5mm diameter screws and approximately 6mm (~1/4") length are required. Four M2x6mm screws are needed for the main rotor blades and motor installation. Short lengths of M2 threaded rod are necessary to secure the pitch and roll control rods together. Servos: Use these servos: https://www.banggood.com/JX-Servo-DHV56MG-5_6g-Coreless-LV-Low-Voltage-DSMG-Metal-Gear-Servo-0_89kg-0_10sec-p-1034036.html?p=HD240528697332015103 Alternatively, use these servos: https://hobbyking.com/en_us/turnigytm-tgy-d56lv-coreless-low-voltage-ds-mg-servo-0-89kg-0-10sec-5-6g.html Tail motor: Use this tail motor: https://hobbyking.com/en_us/ntm-prop-drive-13-12-2400kv-40w.html Main motor: Two suitable main motors are the C10 Micro Brushless Outrunner 2100KV or the Turnigy 2211 Brushless Indoor Motor 2300KV. Both require a longer shaft, which can be easily modified. A 2100-3000KV motor should work adequately. There are gears for two ratios in the files. The one with the small pinion is suitable for higher KV motors. I have included photos showing how to modify typical quadcopter motors, which function well for micro helis of this size. ESC: Use any small 3S capable ESC. For this prototype, I used a 6A ESC for the tail and a 15 A ESC for the main motor. However, 6A ESCs are sufficient for both motors. One ESC requires a BEC, while the other can be OPTO. Battery: A 3S 450mAh or similar battery is recommended: https://www.banggood.com/Gaoneng-GNB-11_1V-450mAh-80160C-3S-Lipo-Battery-JSTXT30-Plug-p-1165484.html?p=HD240528697332015103 Alternatively, use this battery: https://hobbyking.com/en_us/turnigy-nano-tech-450mah-3s-65c-lipo-e-flite-compatible-blade-180cfx-eflb4503sj30.html The battery tray can accommodate batteries up to 30 mm wide. I used an Orange 3 gyro receiver for stabilization, but a flybarless controller would be significantly more effective. A ZYX S2, V-Bar Mini, or similar controller would be suitable.