GlassKnees
Well-Known Member
I recently suffered a crash Aug 8 - suspect a defective prop separation that caused my Elev-8 to pitch over and crash:
I just completed the repairs - had to replace the two front booms (those with the red mylar) and their motors, the GPS mast, and all screws that attach the booms to the center chassis. Here's a pic of the repaired aircraft:
After successfully re-calibrating the accelerometer, radio, ESCs and compass, I took it out for a test flight which was also successful. Later, I took it out for another flight but after 6 minutes or so, the voltage failsafe was triggered and the aircraft landed automatically.
I checked the battery voltage and discovered that it still had plenty of juice, and that's when I discovered that the APM thought that the voltage was lower than it is. You have to calibrate the APM power module using Mission Planner. Using a multimeter, I measured 12.1 V on the battery shown in the picture above, but Mission Planner indicated 11.7 V. So I adjusted it upward until it agreed with my measurement.
I can also do the same for current, but since I don't have a power meter, I will simply monitor voltage for the time-being. I will recharge the battery and if weather permits, take it out for a hover endurance test.
I just completed the repairs - had to replace the two front booms (those with the red mylar) and their motors, the GPS mast, and all screws that attach the booms to the center chassis. Here's a pic of the repaired aircraft:
After successfully re-calibrating the accelerometer, radio, ESCs and compass, I took it out for a test flight which was also successful. Later, I took it out for another flight but after 6 minutes or so, the voltage failsafe was triggered and the aircraft landed automatically.
I checked the battery voltage and discovered that it still had plenty of juice, and that's when I discovered that the APM thought that the voltage was lower than it is. You have to calibrate the APM power module using Mission Planner. Using a multimeter, I measured 12.1 V on the battery shown in the picture above, but Mission Planner indicated 11.7 V. So I adjusted it upward until it agreed with my measurement.
I can also do the same for current, but since I don't have a power meter, I will simply monitor voltage for the time-being. I will recharge the battery and if weather permits, take it out for a hover endurance test.
