OK, so I completed my first flight and uploaded it to Healthy Drones and among the data collected the thing that struck me was the battery temp. It was cold today, about 34F degrees, and at the start of the flight the battery was at about 57F degrees and by the end of the flight it had increased to 87F. Actually, the temp started at 57F and decreased to 55.7F before beginning to increase. I think that's due to the fact that the first 30 seconds of power on was compass calibration and that doesn't put much of a load on the batteries so the TB47 continued to cool off due to the cold air temps.
So, even as cold as it was and with no pads on the battery the pack increased by about 31F in 8.5 minutes. I'd asked about this a few days ago but now that I have my I1 flying I'm able to see this for myself. So, it looks to me that so long as you keep the battery warm before flying and don't take a lot of time getting into the air the battery temp should be just fine once you're flying.
Also in the Healthy Drones data was a log of warning messages and I had one just before takeoff warning me that the battery temp was below 15C and to warm the battery to 25C. If I'd started at 25C it's likely the battery temp would not have increased quite as much but still likely that the max temp would have been nearly 100F. I can see how flying in really hot weather could cause the battery temp to really climb -- what's the highest temp anyone's seen so far?
Brian
So, even as cold as it was and with no pads on the battery the pack increased by about 31F in 8.5 minutes. I'd asked about this a few days ago but now that I have my I1 flying I'm able to see this for myself. So, it looks to me that so long as you keep the battery warm before flying and don't take a lot of time getting into the air the battery temp should be just fine once you're flying.
Also in the Healthy Drones data was a log of warning messages and I had one just before takeoff warning me that the battery temp was below 15C and to warm the battery to 25C. If I'd started at 25C it's likely the battery temp would not have increased quite as much but still likely that the max temp would have been nearly 100F. I can see how flying in really hot weather could cause the battery temp to really climb -- what's the highest temp anyone's seen so far?
Brian