Yikes! I nearly lost my Inspire 1 this morning. No, it wasn't a fly away.
I’d been flying in GPS mode to capture some shots over a decently sized river, but at around 50% battery level I flipped into flying Atti to get some 50mph speed shots. After doing several runs up and back - perpendicular to my location 50 feet in from the shoreline - I hit 30% battery and started getting the low battery warning. At this point the craft was about 700 feet out and 25 feet up from me on shore, with most of that distance being covered by open water. I routinely pull her in at 30% battery and usually have it powered down by 27-28% at the most.
There was no deviation with my actions here. I start bringing the craft home towards me, still flying pretty aggressively with an open throttle in Atti, but suddenly after covering a few hundred feet get a warning about low voltage. Being familiar with what this means, I know it’s pretty serious (land ASAP) so I’m freaking out a little bit with a pounding heart due to the space between us and start contemplating that I may lose this thing to the water. I know that I’m at severe risk of auto decent anytime (still over water) and fear abrupt power loss if I’m too aggressive with the controls. Momentum is on my side though, so I eased off my speed, orient the quad more toward me and get her just over land as she auto descends. Phew! It was a dramatic series of seconds and a little too much excitement for me, I had to give myself a few minutes to settle before packing things up and heading home.
Unfortunately, I’ve no buoys or floaties attached for any kind of emergency water landing, but need to seriously consider crafting something now. This was one of my newer batteries that I received last week. It hasn’t been used extensively, but it has been put through the paces a few times with no issues. It was on it’s 4th charge cycle. The temperature was in the mid 40s at the time and it had been sitting for 3 days fully charged before I used it again. Reviewing its stats now, The power is at 26% and it's showing 22.5 for voltage, so health appears normal. I’m going to attribute most of this to flying at full speed in Atti for awhile when I was nearing low battery. Needless to say I’ll be taking a closer look at this battery, testing it a bit more before any prolonged use and will be more cautious about extended aggressive flying in Atti when getting low on battery.
Anyone have information on what can contribute to quick voltage drain and/or low voltage?
Anyway, figured I’d share my story in hopes that it serves as a cautionary tale for others.
Bryant |