The motors, propellers and frame are made of Lego. Non-Lego parts are the battery, radio receiver and flight controller. After building I fly this quadcopter indoors and outdoors. Enjoy!<br /><br />Drone specs:<br />Motors (4x): Lego L-motor [88003-1]<br />Propeller blades (8x): Lego Propeller 1 Blade 14L [89509]<br />Gearing: 1:1.67 gear-up for each rotor<br />Frame: Lego liftarms and other Lego parts (look at 11:41 component list)<br />Flight controller: Matek F411-mini<br />Motor driver circuit (4x): MOSFET IRLR2905 + Schottky diode 1N5819 + Resistor 12 kOhm (look at 03:57 circuit diagram)<br />Radio receiver: FrSky R-XSR Micro 2.4GHz<br />Radio transmitter: FrSky X-Lite 2.4GHz<br />Battery: LiPo 9s 33.3V 200 mAh (made out of nine Turnigy nano-tech 200mAh 3.7V 35-70C Pico)<br />Weight with battery: 410 grams<br />Max thrust: 470 grams<br />Flight time: about 2 minutes<br /><br /><br />Betaflight settings diff:<br />---------------------------------------------------<br /># version<br /># Betaflight / STM32F411 (S411) 4.1.1 Nov 15 2019 / 12:55:17 (1e5e3d369) MSP API: 1.42<br /># manufacturer_id: MTKS board_name: MATEKF411 custom defaults: YES<br /><br /># start the command batch<br />batch start<br /><br />board_name MATEKF411<br />manufacturer_id MTKS<br /><br /># resources<br /># Note: pass telemetry to transmitter (http://www.mateksys.com/?portfolio=f4...)<br />resource MOTOR 5 NONE<br />resource SERIAL_TX 11 B03<br /><br /># feature<br />feature -AIRMODE<br /><br /># map<br />map TAER1234<br /><br /># serial<br />serial 30 32 115200 57600 0 115200<br /><br /># aux<br />aux 0 0 0 1700 2100 0 0<br />aux 1 1 1 900 1700 0 0<br />aux 2 28 1 1300 2100 0 0<br />aux 3 47 1 1700 2100 0 0<br /><br /># master<br />set min_throttle = 700<br />set min_command = 0<br />set use_unsynced_pwm = OFF<br />set motor_pwm_protocol = OFF<br />set motor_pwm_rate = 480<br />set align_board_yaw = 135<br />set pid_process_denom = 16<br />set gyro_1_align_yaw = 1800
