I'm having a few problems with a new coaxial skyjib X4 build (6S, 4014-11's, 15 x 4.5, approx 8.5 kg). I'm thinking/hoping the problem may lie with the motor and propeller alignments which I plan to check tomorrow. For now, I'm just scouring the internet for any relevent info. Any pointers as to what else may be causing my problems would be really appreciated...a crash today has dented my confidence somewhat.
The X4 flies OKish in still conditions but is horrific in any wind....kinda defeats the object of having the coax! The lack of control in wind is so bad that it resulted in a very hard and sideways landing today and 4 broken propellers.
The problem is that when confronted with any wind (gusts being especially bad) the craft starts wobbling and oscillating badly; when this happenes I have also noticed the engines make a kind of pulsating “vroom vroom” noise with a frequency of just under a second or so, rather than the constant whirring sound. Like I say, when its out of the wind it hovers and flies fairly well although by no means perfect.
I've changed the gains from low to high and back again, but this seems to have little effect so I dont think this is the controlling factor in my problem.
The WKM sensor unit is securely fasten with the standard DJI 3m foam tape on the top plate (which has the rubber stand-offs).
GPS and IMU offsets are setup and gps reception was good at test location.
I had previously thought that because both the top and bottom engine mounts of the X4 both have locator pins that fit into predrilled holes on the booms, the engines and propellers would by default be aligned. The same goes for alignment of the booms between the boom clamps. I will check tomorrow and hope I do find that they are out of alignment, because if the alignment is OK then I dont have a clue what the problem is.
Would possible alignment errors in my X4 build be sufficient to cause the problem I'm having? Because everything thing is predrilled, its hard to see how the misalignment could be large enough to cause the problems I have?
Any help or suggestions would be really appreciated because after today exploits I feel a tad deflated.
Cheers
The X4 flies OKish in still conditions but is horrific in any wind....kinda defeats the object of having the coax! The lack of control in wind is so bad that it resulted in a very hard and sideways landing today and 4 broken propellers.
The problem is that when confronted with any wind (gusts being especially bad) the craft starts wobbling and oscillating badly; when this happenes I have also noticed the engines make a kind of pulsating “vroom vroom” noise with a frequency of just under a second or so, rather than the constant whirring sound. Like I say, when its out of the wind it hovers and flies fairly well although by no means perfect.
I've changed the gains from low to high and back again, but this seems to have little effect so I dont think this is the controlling factor in my problem.
The WKM sensor unit is securely fasten with the standard DJI 3m foam tape on the top plate (which has the rubber stand-offs).
GPS and IMU offsets are setup and gps reception was good at test location.
I had previously thought that because both the top and bottom engine mounts of the X4 both have locator pins that fit into predrilled holes on the booms, the engines and propellers would by default be aligned. The same goes for alignment of the booms between the boom clamps. I will check tomorrow and hope I do find that they are out of alignment, because if the alignment is OK then I dont have a clue what the problem is.
Would possible alignment errors in my X4 build be sufficient to cause the problem I'm having? Because everything thing is predrilled, its hard to see how the misalignment could be large enough to cause the problems I have?
Any help or suggestions would be really appreciated because after today exploits I feel a tad deflated.
Cheers
