Difference between revisions of "Nighthawk250"

Revision as of 10:40, 28 July 2015

Power calculator
Frame: HobbyKing Spec Class 250fpv
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
- FPV Camera: 1/3 Sony CCD 7-13V (3S) current 70mA
- FPV Transmitter: 7-24V 190mA
- Video Receiver: current 12V 200mA
Video "goggles"
Weight:
- Theorical weight: ~415g
- Calculated weight: 560g

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 in series, and is representing the tension (1S=3.7V, 2S=7.4, 3S=11.1V, ...). P is in parallel. Usually LiPo are in series and P=1
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
- A good trick to test is to charge the cells individually using the balance cable, it's much faster than the balance mode that needs to discharge overcharged cells a lot

Having some problems with the vTX right now, apparently at full throttle. Electrical perturbations ?

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 File:drone6.jpg
 File:drone5.png
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 </gallery>
 == See also ==
 * [[Drone]]