Hi! I am a gps drone flyer who recently got into fpv with dji fpv drone and now I got my first whoop, an emax tinyhawk II. Now.. i just crashed and lost it in a field with particularly tall grass. Kind of a needle in haystack situation. Much as I regret losing the drone my concern is the fire hazard from the battery. It was a 450mah 1s. Do you guys think it is much of a concern? Thanks in advance!!!
Lost quad_battery concerns
- Thread starter mc95078
- Start date
wafflejock
Well-Known Member
Hiya! Yup it happens, just FYI for future ones can setup "beeper" on a switch and so long as it doesn't huck the battery (strap it down good) then can flick the switch to make at least the motors beep. For bigger quads I use a vifly v2 buzzer with it's own little battery pack so even if my main battery flies that thing goes into alarm mode in 30s if I don't find it and push the button and at that point it becomes hard to ignore (only downside being if stuck in someones tree, luckily it is smart enough to shut off at night but can get annoying no doubt... it's loud).
Regarding the battery.... it's not a major problem as long as it doesn't get punctured and doesn't get crazy hot or short out through something low resistance (allowing lots of current to flow and therefore lots of heat to be given off). I don't think rain water is low enough resistance to worry about it happening naturally but if someone mows the grass there ever they might be in for a surprise.
Regarding the battery.... it's not a major problem as long as it doesn't get punctured and doesn't get crazy hot or short out through something low resistance (allowing lots of current to flow and therefore lots of heat to be given off). I don't think rain water is low enough resistance to worry about it happening naturally but if someone mows the grass there ever they might be in for a surprise.
wafflejock
Well-Known Member
Basically the battery should just drain out and if it's still hooked to the quad that should act as a pretty good drain until the MCU (chips) on there get below their low voltage cut off and just switch off, then it'll be a slow trickle down from about 2.5V to 0 but really at that point they should be mostly inert I think, batteries fully charged are the biggest danger.
The voltage at the time of the crash was 3.5V - 3.4V, I guess it will slowly drain. I had a reception after the crash (and then i disarmed it) when it crashed so it wasn't punctured or anything. How far could the tinyhawk with the radio and from the RTF kit fly you think and still get good reception? 300m?
wafflejock
Well-Known Member
Yah 300m with clear line of sight is a pretty safe bet but it largely depends what's between you and the quad or the TX and RX. Also if you have goggles can often just disconnect the antenna or just use a patch antenna and can home in on where a quad is based on where the video signal gets better or worse pointing the goggles around, this helped me recover one before I did the buzzer stuff when I ditched a 5" in some really tall grass.