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Nov 21, 2016, 11:22 PM
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Ganged battery drive 2

The last 18.6 mile drive was a long long time ago:

For today's 18.5 mile drive, put battery 1 on the bottom & battery 2 on top. Battery 1 still gave 3.4Ah & battery 2 gave 4.5Ah, so the cable was not the limiting factor & hauling around drinks didn't make any difference. It was the internal resistance of the batteries. Battery 2 was dead by the end.

In other news, a rare teardown of the DJI Mavic rounded the blogs.

DJI Mavic detailed Teardown (19 min 22 sec)

It was another frustrating experience watching a millenial struggle through simple concepts & have no idea how things worked the way previous generations did.

The mane nugget was how the IMU has evolved from being randomly scattered on the mane board to being encapsulated in a very large, weighted, shock dampered enclosure, connected by a very long ribbon cable to reduce coupling. It matches what lions discovered years ago.

It was enlightening to discover lions were on the right track in their treatment of the IMU with a lot more packaging than the main processor, while everyone else was putting everything on a single board.
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