PLEASE HELP !!
Ok here is the breakdown.
tarot x4 980 with coaxial motor mounts
mad 5015 v3 280 kv (8)
2170 folding props
cube blue h7
here4
bec yes
power brick yes
6s 23,000 mah lipo
PROBLEM
On take off drone flips over towards the back… always the backside
Check motor order and direction.
Correct is A B C D not 1, 2, 3, 4
Yes, MissionPlanner motor test is your friend. The QuadX8 motor order is very different to ordinary quads, but the motor test order follows normal MissionPlanner behaviour.
Immediately set up the battery monitor and get that working accurately, then go back to the Initial Parameters calculator and redo that to get all the correct battery settings in place, also select “Suggested” settings and accept everything it offers.
Dont deselect the Fence option.
Also set:
BRD_BOOT_DELAY,3000
INS_LOG_BAT_MASK,1
INS_LOG_BAT_OPT,4
LOG_BITMASK,180222
They will be handy for the rest of the tuning process.
I would advise to go through the Methodical Configurator from start to finish.
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They’re in the right order and spend the right direction I have made many of these in my life just not one that’s large and for some reason it doesn’t like me I guess…
I tried that it keeps crashing every time I connect the Drone it literally just crashes out
So either the flight controller orientation is wrong, or the motor order (and maybe spin) is wrong.
Redo the accel calibrations, redo the motor tests and ensure the motors all work in that A, B, C, D,E… order as per the diagram I posted.
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is this the 1st flight for this UA? if yes, you seem to fly under Loiter flight mode before a fundamental UA stability check. did you use GCS to arm the UA? flying in mode 2 RC? you should prepare a flight mode for Althold. CubeOrange, can consider moving to a higher firmware version.
your RC1, 2, and 4 trim values are unusual to me. Not sure is it a concern. Mine mid stick value is RC1_TRIM,1501, RC1_MAX,1901 RC1_MIN,1101
RC1_TRIM,874
RC2_TRIM,874
RC4_TRIM,874
I will do it today. Let me ask you something. So on the x8 we know the motors on same arm spin opposite of each other. CW CCW , CCW CW. My xrotor ESC have a dip switch for the spin direction. Normally you wire the 3 wires up the same for both motors for example CW, and when you flip one of them upside-down it’s now spinning CCW. should I have for the example above the dip switch in the CW position and when it gets turned upside down it’s spinning CCW?
Like I said I have made 100+ of these and the only thing different with this one is the size, and the ESCs have a dip switch for CW CCW spin direction.
I will so what you suggested later today and report back.
Ok . I made sure that
B: motor son in right direction. - they were.
I also did everything you suggested. Changed the parameters mentioned above. Recalibrated accelerometers , compass , recalibrated ESCs.
Now I have to wait for more propellers to get here. They are about $30 each so it’s going to be a few weeks before they arrive.
Anything I can do until they arrive?
I can’t figure it out lol. I have been building drones for years and I have always run into snags like everyone else but this is kicking my butt.
I’m sure it is something simple, always is but the difference now is that I was a little intimidated by a large x8 with folding props. Not afraid intimidated but more of a “WOW” .
And I think I looked over something small but of apparently BIG importance.
99% of the time these tip-over events are motor order, so more time spent in the motor test screen is less time spent replacing props 
The spin directions, CW or CCW, are when looking down from above.
The easy check is look at the diagram and all the TOP motors (1, 4, 3, 2) and props, get all these correct. Then all the BOTTOM motors must spin the opposite direction to the motor directly above it.
For the motor order in the motor test page, you should be able to click on the “All in sequence” button and get:
Motor 1/A
Motor 6/B
Motor 4/C
Motor 7/D
and so on
Also if those are the MAD integrated sets, (motor and ESC all in one unit) they require:
MOT_PWM_MIN,1100
MOT_PWM_MAX,1920
so you might have to recheck your MOT_SPIN_ARM and MOT_SPIN_MIN
I know the motor order and spin direction. That was all correct from the start. I’m not trying to act like I know everything ( that’s obvious) but I can say im 
percent certain that’s not the issue. I have no idea how many times I checked them but no doubt more than 5.
The only difference between this one and any of the other ones I have built (100+ ) is size, folding props (yes the bottom ones facing the sky) and the ESCs . I have built a quad this size using everything I am now just a 4 motor configuration. That was last month . I will set those parameters you mentioned about MAD.
I appreciate you taking the time to work with me on this.
I understand about watching the motor tests many times
If you do a lot of quads - the QuadX8 motor order is slightly different than expected and is a trap for the young players.
Those ESC PWM setting I gave only apply to their integrated motor sets. If you use a separate ESC check what it requires.
Yeah I know . I have built many X8s. The motor layout is much much different… oh my god I think I figured it out (maybe)
The ESCs calibration. After I did that I swore I heard a ESC beep after I started it up for first flight. When I was going to fly it 1st time .After the ESCs beeped I swear I heard one of them beep after the others. A split second after they beeped I swear I heard 1 beep out of sequence…
If I did (I know I did) that would cause a tip over right? I think I was one in the front. The servo wire gave me a little trouble during the build.
I’ve got a QuadX8 with 2 4in1 ESCs and always one of the 4in1s starts up at a different time to the other, even some of the individual ESCs are fractionally different.
Could it be that the propellers are installed in the wrong direction?
…
Nope. Everything checks out.
I know you’ve checked this and checked it again. In case anyone else needs it, or if you’ve selected a frame type not listed in the current wiki, here are some screenshots of a project I’m working on to improve our docs. This horse is pretty dead, but it seems it still needs beating often…
What are your thoughts on a folding propeller that will work on coaxial. I’ve never had used folding propellers on a coaxial. Am I say to assume that any of them will work as long as I put the bottom ones on correctly? Just take the propeller part off the adapter and flip it upside down so it would be right side up I guess if it makes it sense … make it look like the top ones do when looking down on it you know what I mean. Where am I wrong to assume that any of them will work . Provided the correct one for the motors of course but you know what I mean .
I mean I made a coaxial iris from 3DR . And all I did using the original propellers that come with them is that took the self tightening nut off turn the propeller upside down and put the nut back on and then I put it on the motor just as normal and worked perfectly. But maybe folding propellers are different I don’t see how …the only difference is one fixed and one’s not… but in the end it’s still a propeller the laws dont change.
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