This page should document the published progress of Axel Borg, a Swedish engineer building his own DIY quadrocopter.

Demo Video on Youtube: https://www.youtube.com/watch?v=wDJC99mb0SU

• Flightcontrol: 5x KK 2.1 running stock 1.6 firmware
• Motors: 76x Multistar Elite 5010 274Kv
• Motor Controllers: 76x afro 20A HV ¹⁾
• Propellers: 17×5 or 18×5.5 Quanum DJI style CF ^{2) 3)}
• Batteries: 80x Multistar 4S 5.2Ah, 6.18kWh ⁴⁾
• Remote Controllers: 5x Turnigy TGY-i6S Digital Proportional Radio Control System
• Weight:
  • Vehicle: 58kg excl. batteries
  • Battery: 35kg
• Load: Tested with 93kg ⁵⁾

• Aluminum tubing 6063 T6
• Aluminum rod 6082 T6
• 4.5kN break kevlar rope for Chair
• Bridge nylon 3D printed parts
• Aluminum pop rivets

• 80 packs, each 5.2Ah, 4×3.7V
• 4 sub assemblies
• super plugs with 15 XT60 connectors, forced by a screw with bearring
• each pack is balanced individually

• 20x Turningy 35W balance chargers
• 2x Turningy 540W power supply
• 2×50-Pin D-Sub Connectors for each of the 4 Packs

• 274 rpm/V
• 28A
• 22-30V
• 630W
• 4mm shaft

Comment from axbor22 on Hobbyking:
Love this motor. I run them on 8S, 20A Afro HV controllers and a 18x 5.5 Quanum DJI style CF prop

• 1000g thrust at 9.8g/w
• 2000g around at 7.7g/W
• 4600g peak thrust (!) at 4.7g/W

with newly charged batteries, two 4S 8000mAh zippys in series. Amazing that the Afro 20A ESC seems to be able to withstand the 31A peak current draw. First time I found HobbyKing products to be underrated

• Current Draw: 20A Continuous
• Voltage Range: 3-8s Lipoly
• BEC: N/A OPTO
• Input Freq: 1KHz
• Firmware: afro_HV.hex
• Discharge wire/plugs: 16AWG/Male 3.5mm
• Motor wire/plugs: 17AWG/Female 3.5mm
• Weight: 28g (Included wire, plug, heat shrink)
• Size: 65x27x11mm (with capacitor)

The motors are tilted by 6° to get a better handling, see video part 18.

My assumption:
Electrically the whole thing is split into 5 more or less equal quadrocopters

• 5 remote controlls, potentiometers on a DIY 3D-Printed Joystick, mechanically couppled
• 5 RC receivers
• 5 Flight controllers
• 76 Motors: Each of the 4 „super rotors“ has 19 Motors, where 4 flight controllers controll 4 motors, and 1 flight controller controlls 3 motors.

Sorted: newest on top:

• Part 25 - Round flight
• Professional video footage and interview (swedish this time -sorry)
• Demo Video
• Part 23 Media Day 1
• Part 22 - Second Flight, Pilot View
• Part 21 - Flying and Turning
• Part 20 - First Flight
• Part 19 - Load Test 93kg, Reduced Motorset (60 vs. 76)
• Part 18 - Tests, tilted Motors, Joystick
• Part 17 - Pictures, Cabeling, Ropes
• Part 16 - Construction and Tools
• Part 15 - Charger, Battery Connectors, Chair