Droning 24/7
 Second Officer
Flight distance : 2310082 ft
United States
Offline
|
Fantomgep Posted at 7-8 23:57
You are absolutely right theoretically. But in the real world the different is insignificant.
The whole system power consumtion during a normal flight approx. 80Watts. (40Wh batt. capacity with 34 min. flight time). The 0,5W difference is only 0,7%, which causes approx. 14sec. less flight time. Others environmental variables (wind, temp., batt. condition, flight dinamic) play more important role, than that 0,5W.
Not to derail this thread, but since the topic includes an increased flight distance 8km -> 10Km (FCC) which can increase flight times.............
Dji spec is a 59.29Wh lipo battery....So lets say a 60Wh batt to make things easier?
60Wh * 60 min = 3600Wm
Bird flies max 34(31) mins (assuming best possible case, wind, speed, etc, etc transmitting at 26dbm)
3600Wm/34m = 105 watts per min
Bird consumes/burns approx on average 105 watts per minute of flight
20dbm = 0.1 watt (CE) and 26dbm = 0.4 watts(FCC), the difference being 0.3 watts
0.3 watts * 60min = 18Wm
Transmitting at 20dbm verses 26dbm uses 18 watts per minute less
18Wm is 17% of the 105Wm
If one saves/uses less 18W per minute of flight time over the best max case we used as our base line ref and adds that savings up over time.......One then can add 17% to the overall 34 minutes
17% of 34min = 5.78 min
Reducing power transmission by only 0.3 watts seems small, but added up over time, should add approx 5.78 minutes to flight times, which, to me and by my numbers, is actually a very significant difference and perhaps the CE's might be getting this extra bit of time, I'm not sure, seems they should.
|
|