Unable to have a reliable flight after epic crash.

F

Fico

Member
Hello my name is Federico, and a new member in this forum.

A couple of weeks ago I started FPV, so in my maiden fpv flight I got so confident that I mistake my quad for a video-game, as a result I crashed my quad into a tree at full speed.

Visual damage:
2 broken arms (3 and 4)
2 broken propellers (1 and 4)

I replaced all broken parts, and in the pre-check flight I discovered that the 3rd motor was malfunctioning losing speed/stopping, and with propeller mounted it started to smoke!!

Obviously I replaced the motor, however the loss of speed/stopping persists but with no smoke whatsoever. The quad flips and crashes when I give it a strong/sudden throttle input.

As a result I changed the ESC. problem persist....

Problem with the power distribution board? I connected the ESC straight to a battery while the other 3 motors were connected to the power distribution board. Problem persist...

It cant be a bad connector as the motors are welded to the ESC bullet connectors.

Configuration:
DJI f450 frame and FC + gps
DJI 30A esc Opto
T-Motor MT-4006-13 740kv
4S 4000
11/5 E-props

Help I am loosing my mind!
 


quad flyer

quad flyer

Member
I watched your video, it sounds like a motor is dropping speed for a moment.
Can you tell which motor it is?
It may be the bullet connector from the motor to the ESC, sometimes they fit really nice when pushed in but does it rotate freely once its in, if it does, this may be causing a momentary open circuit causing the motor to splutter.
One way to test this will be to put the quad on the floor, arm the motors, spin them up gently, then wiggle each wire from the motor to the ESC, if this causes the motor to splutter then thats the problem.
I had this on one E-Max motor and I ended up using a small blob of CA glue on the outside of the bullet connector to stop it from moving.
I hope this helps.
 

ROVguy

ROVguy

Member
I don't mean to teach you to suck eggs, but did you recalibrate everything after repairing? Not just the GPS but the IMU as well?


Sent from my iPhone using Tapatalk
 

F

Fico

Member
quad flyer: i dont use bullet connectors, all the motor wires are welded to the esc to avoid any glitches
all motors are doing this one more than the others...

ROVguy: I did re-calibrate the IMU and gps however not efective
 

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