Difference between revisions of "Nighthawk250"

Revision as of 11:34, 11 August 2015

Power calculator
Frame: Nighthawk 250 Pro V2 CF
Motor: EMAX MT2204 2300KV 7.5A, 2-3s, max 90W
ESC: Afro 12A SimonK (2-4s lipo), BEC: 0.5A Linear 5.0v
Props: Gemfan 5030
FCU: CC3D Atom 4.8-15V 70mA
Batteries
- 3S 1000mAh 20-30C
- 3S 1300mAh 35-60C
FPV
- FPV Camera: 1/3 Sony CCD 7-13V (3S) current 70mA
- FPV Transmitter: 7-24V 190mA manual -> FR1 CH8
- Video Receiver: current 12V 200mA
Video "goggles"
Weight: 515g w/ battery (60C)

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 ?~~ Good, got some new antennas

cabling is hard
1st build
fpv tests
stats
rebuilt everything, better antenna placement, battery cables, fix the feet, ...
Broken an arm trying to roll
Arm fixed using epoxy, flying well, we'll see if it handles vibrations and the next crash
V2 because HK frame broke again after ~10 landings, CF frame, looks nice (not tested yet)

@@ Line 2: / Line 2: @@
 == Current setup ==
-* [http://www.ecalc.ch/xcoptercalc.php?ecalc&lang=en&cooling=medium&rotornumber=4&config=flat&frame=250&weight=515&calc=auw&elevation=500&airtemp=25&qnh=1013&batteries=0&battcap=1300&battri=0.0107&battv=3.7&battccont=35&battcmax=60&battweight=38.6&chargestate=0&s=3&p=1&esc=0&esccont=12&escmax=12&escri=0.015&escweight=10&motor=0&type=0&motorkv=1900&motorio=0.5&motorvio=11.1&motorlimit=49&motorlimittype=w&motorri=0.405&motorlength=16&motorpoles=12&motorweight=15.5&gear=1&propeller=0&pconst=1.3&tconst=1.0&proptwist=0&diameter=5&pitch=3&blades=2 Power calculator]
+* [http://www.ecalc.ch/xcoptercalc.php?ecalc&lang=en&cooling=medium&rotornumber=4&config=flat&frame=250&weight=515&calc=auw&elevation=500&airtemp=25&qnh=1013&batteries=0&battcap=1300&battri=0.0107&battv=3.7&battccont=35&battcmax=60&battweight=38.6&chargestate=0&s=3&p=1&esc=0&esccont=12&escmax=12&escri=0.015&escweight=10&motor=emax&type=0&motorkv=2300&motorio=0.5&motorvio=10&motorlimit=90&motorlimittype=w&motorri=0.205&motorlength=32&motorpoles=14&motorweight=25&gear=1&propeller=0&pconst=1.3&tconst=1.0&proptwist=0&diameter=5&pitch=3&blades=2 Power calculator]
 * Frame: [http://fpvracing.ch/en/frames/213-nighthawk-250-pro-v2-cf-frame-red.html Nighthawk 250 Pro V2 CF]
 * Motor: [http://fpvracing.ch/en/motors/64-emax-mt1806-2280kv-cw.html EMAX MT2204 2300KV] 7.5A, 2-3s, max 90W