HMArnold
lvl.4
Flight distance : 24012 ft
United States
Offline
|
I have an S1000+ with A2/Lightbridge/IOSD MK II/900 mhz Datalink/Zenmuse Z15 setup carrying a Sony A6000 camera.
First, I learned that the voltage reading is very dependent on the load or strain on the motors. If you fly around with a 23 volt reading and then land, as soon as the strain of the motors isn't lifting the UAV anymore, the voltage reading goes back up above 24. Take off again, the voltage goes back down, land again, the voltage comes back up. To get a useful idea of how much battery capacity I have left at the end of a flight, I hover just before I land, because once you land, the voltage meaning is useless.
Second, I once disabled the "low voltage land" option on a calm day and started with a full battery, flew around until the voltage showed 22 or so, then came back and hovered with the platform positioned so that i could see the LED. Sure enough, it flashes yellow, then red, but the platform is still flying fine.
At somewhere down near 20 volts, it took more throttle to stay in the air than usual, but I was still flying, and could still ascend if I needed to.
At about 19.5 the beast settled nicely down on the ground with the throttle pushed to max.
I went home and changed my yellow warning to 21, and the low voltage land to 20.5
The battery supply ability is not a flat line, however. The drop from 24 to 23 could be 5 minutes, but the drop from 20 to 19 could be 30 seconds.
Since the S1000+ requires 2 controllers, one to fly and one for the camera, my wife is a biologic voltage warning on most flights. She used to be screaming at me at 23 volts, but now her voice doesn't show concern until about 21 volts.
I have flown under 21 volts many times, and can't tell any loss in battery capacity.
Depending upon how teenager-unlike I fly, I can usually expect near 19 minutes with my 15000 mah batteries.
I suggest you disable the autoland on a calm day, make your wife watch, then discover the other 40% of your batteries you've been landing with, LEDs ablaze
|
|