3 ms·
Counting pixels in that image it seems like both the ascend and descend took exactly 5 seconds each. So that's about 2.16 km/h or 1.34 mph.
by inigoalonso 5y ago
Counting pixels in that image it seems like both the ascend and descend took exactly 5 seconds each. So that's about 2.16 km/h or 1.34 mph.
- walrus01 5y agoOr about 60cm ascent or descent per second. For earth based quadcopter type UAS, straight up or down ascent or descent would typically be measured in m/s.