While flight testing one of our drones, it had a sudden throttle loss for only about a second, and it crash landed. I put it in STABILIZE mode as quickly as possible, but it was not very high, so I didn’t have enough time to avoid a crash landing.
If you look carefully at time 9:05 - 9:06 there is a momentary drop in current to zero amps. I took a look at the csv files for PWM actuator outputs and saw that the PWM value for throttle dropped from about 1600 usec to 1075 usec during this interval.
During this time the drone was in DESCEND mode, so it started to come down slowly, which is the expected behavior.
What would cause the PWM values to drop like that? The battery voltage is good. The other parameters look OK. This appears to be some kind of momentary glitch, but what would cause it?? Very disconcerting. Never saw this before.