Nighthawk250

• Building a FPV Drone: HobbyKing Spec Class 250fpv

Current setup

• Power calculator
• Motor: 4.4A max, 2-3s lipo, max 49W
• ESC: Afro 12A SimonK (2-4s lipo), BEC: 0.5A Linear 5.0v
• Props: Gemfan 5030
• FCU: CC3D Atom 4.8-15V 70mA
• Batteries
  • 11.1V 3S 1800mAh 20C
  • 11.1V 3S 1000mAh 20C
  • 11.1V 3S 2200mAh 30C
  • 14.8V 4S 1800mAh 25C (non usable with these motors)
• FPV Camera: 1/3 Sony CCD 7-13V (3S) current ?
• FPV Transmitter: 7-24V 190mA
• Receiver: current ?
• Weight:
  • Theorical weight: ~415g
  • Calculated weight: ?

Upgrade planning

• More powerfull motors ! 18g 88.8W http://fpvracing.ch/en/motors/62-emax-mt1806-2280kv-cw.html
• next frame ;) http://www.minihquad.com/frames/blackout-mini-h-quad/

Assembly

Frame

• Basic assembly guide: https://www.youtube.com/watch?v=r8ALzUluyXM
• An other assembly guide: http://www.cardella.tk/2014/09/fpv250-quadcopter-build.html

Configure FCU: CC3D Atom

• Install OpenPilot GCS (install of openpilot fails but openpilotgcs is working) https://wiki.openpilot.org/display/WIKI/Downloading+and+Installing+the+Ground+Control+Station
• Hardware setup: https://wiki.openpilot.org/display/WIKI/CopterControl+-+CC3D+-+Atom+Hardware+Setup
• Full introduction to building a quad with the CC3D https://www.youtube.com/playlist?list=PLYsWjANuAm4r-E61stLchCR4bzY3NmDNh

Batteries

• https://www.reddit.com/r/Multicopter/wiki/power
• LiPo are dangerous! https://www.youtube.com/watch?v=YCWdnjLqVWw
• C rating : the higher, the higher current you can draw http://www.rcheliwiki.com/C_rating
  • C*Capacity in Ah=Current
  • Current: 20C * 2.2Ah = 44A
  • Power: 44A * 11.1V = 488.4W
• S is the number of cells, and is representing the tension (1S=3.7V, 2S=7.4, 3S=11.1V, ...)
• Balancing: Cells need to be a the same charge level so we can avoid overcharging.
  • It's a good idea to always use the balance mode to charge a multiple cells battery
  • http://www.rcheliwiki.com/Balance_charger
  • Use the charger to check and rebalance cells https://www.youtube.com/watch?v=AChoy_PsVEg

Gallery

• 1st flight https://www.youtube.com/watch?v=RCSfAMZ6bm0
• FPV Camera setup https://www.youtube.com/watch?v=aNmkK1-EYYc

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See also

• Drone