So, I managed to break 45 mins flight time today with a 'normal' set up including GOPro & Brushless gimbal.
- Tarot Iron Man Quad frame (600mm)
- Turnigy 390KV Motors - 4 off
- 40Amp Hobby King ESCs - 4 off (Over spec but I had them lying around)
- 8300mah Battery - 3cell
- APM2.5+ Board
- 15 inch Carbon Fibre props.
The Rig was really stable and there was a light wind but I had an issue with the quad dropping and then regaining height. For no apparent reason it would suddenly lose altitude regardless of the amount of throttle I applied, then it would touch ground and recover the hover.
This got more frequent in nature as the flight progresses until the descents became so rapid that I got a bit twitchy about the rig being damaged.
No ESCs were hot, nor the motors, nor the APM, nor the PDB. All seemed fine but somethign WAS happening.
Anyone had this before on longer flights or know of a possible reason for the sudden drops in what I am presuming is Motor Performance