reprapped + carbon fibre quadcopter
by jamesglanville, published
I wanted to build a light and powerful quadcopter as cheaply as possible. This is it. I've had a flew test flights, and it works really well (just need to learn to fly it better now.) It should be able to lift about 1kg of payload (not fully tested).
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Buy all the parts, then print the parts here: (total cost is around Â£200, total weight around 1.4kg)
From HobbyKing: Code Description
387000001 MultiWii 328P Flight Controller w/FTDI & DSM 1 Reserved TR2217/20 Turnigy 2217 20turn 860kv 22A Outrunner 4 Reserved TR_P25A TURNIGY Plush 25amp Speed Controller 4 Reserved 017000063 10x4.5 SF Props 2pc Standard Rotation/2 pc R 4 Reserved Z50003S-20 ZIPPY Flightmax 5000mAh 3S1P 20C 1 Reserved ACC6 Turnigy Accucel-6 50W 6A Balancer/Charger w/ 1 Reserved DL-Volt-Alarm On Board Lipoly Low Voltage Alarm (2s~4s) 1 Reserved FS-L001 Hobby King 2.4Ghz 6Ch Tx USB Cable 1 Reserved HK-T6A-M2 Hobby King 2.4Ghz 6Ch Tx & Rx V2 (Mode 2) 1 Reserved 258000011 10CM Male to Male Servo Lead (JR) 26AWG (10p 1 Reserved WHS2MM-Yelow Turnigy 2mm Heat Shrink Tube Yellow (1mtr) 4 Reserved WHS3MM-Yelow Turnigy 3mm Heat Shrink Tube Yellow (1mtr) 3 Reserved WHS5MM-Yelow Turnigy 5mm Heat Shrink Tube Yellow (1mtr) 2 Reserved OR009-00506 M3 x 20mm Nylon Screws (10pcs/bag) 1 Reserved Total: Â£193 including delivery
I don't know if anyone will actually build this, but this is vaguely what to do:
The motors screw into the holders with m3 screws from below. The wires thread through the tubes. The holes for the carbon fibre tubes print slightly undersized on purpose - I don't glue them, they're just a friction fit. I rolled up some sandpaper, and enlarged the hole gradually until the rod just barely went in (considerable force.) Every time I crash the quad, they rotate slightly, which I consider better than trying to glue them and have something actually break.
Use m4 bolts to screw the base and top to the central rod holders. They should self-tap. The ESCS fit inside the case, I had to bodge the wiring to get it to fit. I'll eventually design a top cover, but for now the flight control board and RX just sit on top, secured by bolts/cable ties respectively. I tapped the holes to m3 size, but they'd probably self-thread.
If anyone has any questions/comments just ask, I know when I built this it was really hard to find a working configuration of motors/escs/batteries/etc. This set works really nicely. I've had a few crashes from 5m, going fast over the ground, and the whole thing has just bounced, and i've only broken one prop so far.