Ardu-copter flipping sideways instead of taking off

Highlighted the leading edges, the prop always spins toward the leading edge, just switch them around.


https://snag.gy/ix1fam

ix1fam.jpg
 
Ok they are all wrong the front of quad is where the camera mount is So left Front CW front right CCW back left CCW back right CW
 
roineust said:
Hotneil, the props are 12 inch.
GJH- i'm changing the props setting, according to your above instructions.
Click to expand...
They should produce as much thrust as 14.5'' 2 blade props as they are three blade. As long as your motor will turn them they'll have plenty of power.
 
OK - very interesting stuff i think might be going on - It seems like the quad wants to actually take off and not to flip - but i have little experience with quads of this size and it is a closed space, so i am going very slowly with throttle push ups. Will be back with results in several minutes.
 
It seems to be better - but the quad wants to take off at quite a high throttle power: In my estimation maybe even 50% throttle or more. And what more, it still doesn't take off very symmetrically. It does not seem to flip now, but kind'a want to take off side ways. This is a closed space where i have 3 meters space in each direction - so i can't let it really take off this way, if it is not a very symmetrical take off.
b.t.w i need it to do the things it is supposed to do - in a closed space, so taking it out to test it might be only an mid-way possibility fore me.
Any ideas how i can improve it further from this phase? Should i go again through the Mission Planner wizard calibration process from the beginning? Anything else i can do to improve take of and hovering stability and symmetry?
 
Hi sounds like it needs tuning , p and I gains are important this locks the quad in more , sorry can't help you with that FCB I have never used one , go on you tube lookup Brian on painless360 he has done a set of videos on setting up , it should tune up ok now the mechanics are right
 
Just thinking back about a year ago I help a guy with his quad it was unstable due to being in a small room the down wash from the props was hitting the walls and coming back at the quad as soon as he took it out side it was fine , you may have the same problem
 
If your using over 50% to get off the floor the motors may not be powerful enough what kv motors do you have
 
Thanks a lot for the help hotneil, GJH, Quest, Jackson and anyone else who replied - At last the right setup and not some basic error that is preventing a take off.. been trying to get to this situation for several days now - so your great!

Would appreciate any further advice regarding fine tuning.

Thanks!
 
Ok not bad , if tuning don't work we may have to rethink motor props set up have you got a link for the motors they may work ok on a 4 cell which will give you more RPM just looked they will go to a 5 cell so may look later at upping the cell count of the battery
 
It looks as most that use this motor on a 650 quad run a 4 cell set up,I have a 700 class and the motors are 650 kv on a 15x5.5 prop
 
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