hallmark007
Captain
Flight distance : 9827923 ft
Ireland
Offline
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ABeardedItalian Posted at 2-24 09:06
I take full responsibility for not doing a full flight check, call it trust or call it ignorance but I've never had a problem with my mini outside firmware behavior. Some flights I'll do a full check but everything was normal, I waited for gps, rotated my controller, my headings were correct and my home point was set. I took off and all my inputs responded just as they always have.
I proceeded to fly for 14 minutes and I had full control over it during that time. I was in full control as I crashed into the flag pole but once it hit the pole it acted on it's own. I've had one prior crash with the mini flying into my porch door trying to land and it just dropped then, I'm really surprised it took off instead of just crashing.
Thank you for reply, first I wasn’t referring to heading from radar, but compass heading which is not the same thing but is the most important thing to check, I had mentioned about picking up interference on the ground for two reasons, 1/ it seems if interference is picked up from ground dji are accepting responsibility, for whatever reason I’m not sure, 2/ picking up interference on the ground it by far the most common place to have this happen, picking up interference in the air is extremely rare and it’s not certain from device log this is what occurred , usually crashing will cause a couple of things 1/ props broken combined with movements from controller could cause strange movements ( but I don’t think this was the case) 2/ warning message motors obstructed which we never seen, it’s very rare to see a crash cause compass problem like we seen here, but compass could have been interfered with by flying close to metal objects which is quite possible . I think log from .dat file may show more of what happened.
Natural and Artificial Magnetic Anomalies Warning
Note
The following information has not been objectively tested to determine it’s impact on a Drones compass accuracy in flight.
1 Many things can distort the earth’s magnetic field in the area you are flying:
• Steel framed or reinforced concrete buildings, bridges and roadways, iron pipes and culverts, high power electric lines, heavy equipment, trucks and automobiles, steel tanks, electric motors and even computers.
• Flying between steel framed or reinforced high rise buildings will distort the magnetic field in addition to causing GPS multi-pathing.
2 Safe distances for compass calibration
• 6” (15 cm) minimum: Metal rim glasses, pen/pencil, metal watch band, pocket knife, metal zipper/buttons, belt buckle, batteries, binoculars, cell phone, keys, camera, camcorder, survey nails, metal tape measure.
• 18” (50 cm) minimum: Clipboard, data collector, computer, GPS antenna, 2-way radio, hand gun, hatchet, cell phone case with magnetic closure.
• 6 ft (2 m) minimum: Bicycle, fire hydrant, road signs, sewer cap or drain, steel pole, ATV, guy wire, magnets, chain-link fence, bar-wire fence, data collectors
that use a magnet to hold the stylus.
• 15 ft (5 m) minimum: Electrical box, small car/truck, powerline, building with concrete & steel.
• 30 ft (10 m) minimum: Large truck, metal building, heavy machinery.
Not from wiki, but drone flight school.
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