apomares-Vzla
lvl.2
Flight distance : 633609 ft
United States
Offline
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endotherm Posted at 2017-5-1 02:45
It didn't turn off (disconnect from power) while hovering. It simply failed to stay in the air. Instead it recorded everything as it fell to the ground, and upon impact it stopped recording. It fell faster than 1.3ft in 100milliseconds (which was the last line recorded) when it hit the ground and stopped before the next line of data could be recorded in the log. It likely dislodged the battery upon impact, which is pretty typical but somewhat surprising at such a low altitude. Perhaps it broke off a battery terminal inside at the same time, which is why it won't start up again.
Regarding the difference between AirData and Phantom Help, they are very similar and nearly as useful as each other for determining the majority of incidents, providing you analyse the full csv data each supplies. Otherwise it is just a preference thing. Both sites start with the same raw data uploaded, but it is up to each which data is translated and returned to the user. PH returns slightly more data relating to pitch/yaw/roll and in the P4, VPS height. On the other hand AD only supplies compass heading, but returns information in relation to gimbal movements, camera tilt and when/where images were captured (much more useful if you are fixing camera issues). The rest of the information is very similar and generally sufficient to conduct a crash analysis. Both sites choose not to return other information which is collected, e.g. temperatures, motor speeds and loads... which would be useful at times (AD does return some of this as graphics on their various sub-pages, but does not supply the figures in the csv data). DJI has access to all of this info and they can make better informed conclusions as a result, if they can be bothered to study it correctly.
I got your point. It was all very fast and I thought it had turned off since none of the propellers were damaged, not even a scratch, and I thought were not turning at the impact.
I looked into the csv data and the P4P recorded the fall as you mentioned. I looked at the battery connectors inside the P4P and there are no signs of damage it must be inside or something else.
Thanks again!! |
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