Standard PS3 dropped out of the sky. Battery failure?

Joined
Jun 19, 2019
Messages
1
Reaction score
1
Age
17
Hey guys. I was hoping you guys could give this flight log a look and tell me what you think. At the end of the flight I was watching the drone and missed the on screen motor overloaded messages. I didn't realize something was wrong until the lights started flashing red signifying a landing. I feel stupid looking at the flight log watching the voltages drop, but I couldn't get it landed in time because I had to do a hand catch because it was over sand. The drone completely lost power, dropped, and now two main motors and all of the gimbal motors are full of sand and unable to move. I charged the battery to 100% just 30 minutes before flying and nothing stood out from the 100s of flights I've had before this one.
Anyway here's the log. Is the anything I did wrong besides missing the motor overloaded warnings/not landing soon enough?
 
  • Like
Reactions: ianzone

ianzone

5000KM TO SOUTHPOLE
Premium Pilot
Joined
May 22, 2016
Messages
5,430
Reaction score
2,963
Age
49
Location
EARTH.NZ
Hey guys. I was hoping you guys could give this flight log a look and tell me what you think. At the end of the flight I was watching the drone and missed the on screen motor overloaded messages. I didn't realize something was wrong until the lights started flashing red signifying a landing. I feel stupid looking at the flight log watching the voltages drop, but I couldn't get it landed in time because I had to do a hand catch because it was over sand. The drone completely lost power, dropped, and now two main motors and all of the gimbal motors are full of sand and unable to move. I charged the battery to 100% just 30 minutes before flying and nothing stood out from the 100s of flights I've had before this one.
Anyway here's the log. Is the anything I did wrong besides missing the motor overloaded warnings/not landing soon enough?
Um,,Yeh that sux,,,I can't work these out proper,,just looking was your smart return home on ?what was your critical battery alert set at,it definitely auto landing from not having power to get back
Screenshot_20190722-203044.jpg
 

Meta4

Moderator
Staff Member
Premium Pilot
Joined
Jan 8, 2014
Messages
13,783
Reaction score
7,810
Anyway here's the log. Is the anything I did wrong besides missing the motor overloaded warnings/not landing soon enough?
Critical low voltage is anything less than 3.3 volts per cell, and the drone will want to land when you get to that level because if you push it beyond that, it probably won't be able to land and will fall from the sky.
You hit that at 19:26.8 with the drone 500 feet away and pushed the very sick battery by forcing it to climb (which drained it even more).
That caused the warning: Motor Overloaded. Aircraft will decelerate to ensure safety.
In a flying machine you need to take the fuel gauge more seriously than you do in your car.
20% = zero.
 
Joined
Aug 7, 2016
Messages
399
Reaction score
163
Age
67
Yes, no issue at all. It is completely pilot error.
About the sand - maybe in authorized service can clean it up after they open motors or better - by new ones it's relatively cheap..
 
Joined
Feb 13, 2019
Messages
478
Reaction score
316
Age
67
Location
LA (Largo Area) Fl
It’s too bad there’s no wetsuit for the P3. Seeing as the main reason I have them on, P4’s, is to keep out sand. but I also enjoy flying in the rain.
 
Joined
Jul 2, 2019
Messages
161
Reaction score
65
Age
48
With regard to the sand, would leaving ths drone in the sun or sowewhere warm to dry the sand out then sucking it out with a vacuum cleaner not work? Attempting to blow the sand out might move it to somewhere less desirable
 
Joined
Feb 13, 2019
Messages
478
Reaction score
316
Age
67
Location
LA (Largo Area) Fl
Sounds like a good start. Hopefully you can knock most of the sand off, when dry. The vacuum sounds like a good idea but you still probably are going to need air after. The bearings in the motor are sealed at least on the P4’s so they can be rinsed with water. The most critical place is the battery compartment and the contacts on the battery. Take care to make sure that they are spotless. A grain of sand on the contacts can cause failure
 
Joined
Jul 2, 2019
Messages
161
Reaction score
65
Age
48
I would be concerned about knocking dislodging sand inwards, the idea with the vacuuming is that it would tend to always move the sand outwards, unless the suction was powerful enough for air to be drawn from other contaminated areas.
Meaning no offence, are you sure the sealing on the motor bearings is water tight? My recollection of bearings is that the seals were protection against dust and dirt rather than liquid.
 
Joined
Apr 26, 2016
Messages
245
Reaction score
119
Location
Swarthmore, Pennsylvania, United States
With regard to the sand, would leaving ths drone in the sun or sowewhere warm to dry the sand out then sucking it out with a vacuum cleaner not work? Attempting to blow the sand out might move it to somewhere less desirable
Good idea. I would also keep it upside down so when the sand dries it doesn't fall further into the motors.
 
  • Like
Reactions: PhiliusFoggg
Joined
Aug 9, 2019
Messages
1
Reaction score
0
Age
60
i also experienced similar only it pranged a branch of a tree on the way down, bent 2 rotors and cracked the gimble bracket. On start up now after a clean and check over; the gimble seems to work and hold position regardless of drone attitude but the drone itself beeps continuously, no flight lights and will not connect to the controller so before I bin it do you think is there anything worth trying?
 
Joined
Oct 14, 2016
Messages
3,903
Reaction score
1,739
Age
63
Location
UK Brit living Latvia
They use these motors on underwater vehicles so yes they are watertight.
They are NOT sealed ... they are shielded ...

Makes no odds about being used in water ... in fact near all e-motors brushed and brushless will run under water ... we used to 'burn-in' brushed car / boat motors by running them in water !

The killer is Seawater though ... they will run - but corrosion will start literally immediately.
 
  • Like
Reactions: Capt KO

RodPad

Premium Pilot
Joined
May 20, 2015
Messages
5,565
Reaction score
1,066
Age
56
Location
Pacific,NorthWet, 97031
i also experienced similar only it pranged a branch of a tree on the way down, bent 2 rotors and cracked the gimble bracket. On start up now after a clean and check over; the gimble seems to work and hold position regardless of drone attitude but the drone itself beeps continuously, no flight lights and will not connect to the controller so before I bin it do you think is there anything worth trying?
Welcome to the Forum!
You would best of starting a new thread, under your aircraft type. P3, P4, etc.

Rod
 

New Threads

Forum statistics

Threads
135,463
Messages
1,401,539
Members
98,664
Latest member
TX Baron