"So let the rebuild begin :)
going to test motor today after opening and inspecting it, everything looks good to go."
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ContraSpec's Discussions
DJI WK-H on Traditional Heli - X-Cell Spectra-G
Started this discussion. Last reply by ContraSpec Dec 1, 2012. 21 Replies 2 Likes
I have recently purchased and built the Miniature Aircraft - Spectra G Gasser and the DJI - WK-H controller.There seems to be very little info on the final configurations for the controller for…Continue
Gasser Heli setup
Started this discussion. Last reply by ContraSpec Jun 22, 2012. 31 Replies 0 Likes
Hi, can anyone give me some guidance regarding my project? i have a x-cell gasser heli 700mm, all the info that i have found on the forums/google etc. all point to a flybarless electric heli which…Continue
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ContraSpec replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"im starting to think the same thing, i did speak to dji, and according to them there is no data logs on it.
the costs for me to send the unit back to dji and get it returned to me are going to set me back +- £500, in shipping and…"
malcolm churn replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"Apparently there is a data log but only DJI can read it. You have been saying though contra that your Tail servos keep failing. i wonder whether this might have been a pre-warning to the IMU failing.?."
malcolm churn replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"Flybarred or not if the IMU fails the bird will fall out of the sky, all of the inputs are carried through the IMU much in the same way as the APM.
Flybarred helicopters have a mechanically stabilised head, there are a few pro's and…"
ContraSpec replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"My setup is a Flybar setup, would that make any difference?"
DeveloperR_Lefebvre replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G
"Yes, for sure if the IMU fails, there would be no control even in manual mode, because you are flybarless, and the system needs the gyros to control it. Best case, it could give you direct control over the swashplate, but that would leave you trying…"
ContraSpec replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"Hi Robert,
Yes, what i can recall seeing was the heli do a slow back flip and then dive bomb the ground head first.
Im speaking under correction, but i believe my training instructor on the master TX, either hit the throttle hold, or throttle cut,…"
DeveloperR_Lefebvre replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G
"I'm not sure anybody could conclude that the FOD "could not happen to" the WKH. Fact is, there are probably 100 WK-M's sold for every WK-H? So the number of units out in the wild which could experience a FOD on a WK-H…"
malcolm churn replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"Well the good news is DJI seem to have found the fault, are you going to send the unit back to DJI?
I dont know much about the Hitec radios, but if the CPU crashed then it does'nt matter what radio you are using.
Keep us informed of whats…"
DistributorMartint BuildYourOwnDrone.co.uk replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G
"Hello Rob
There is no FOD on the WKH, this is only a WKM issue that was taken care of by DJI and a recall. The WHK system is sound and has always worked without fault here when set up correctly. I hope that DJI look after you…"
ContraSpec replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"Hi Malcolm,
I'm using the Hitec Aurora9.
After giving DJI a call, and further tests. The conclusion for the cause of the crash is the IMU failed and jammed the CPU, in turn lost all coms"
malcolm churn replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"Really sorry to hear that, what radio you are flying? I know on some of the 7 channel futaba's you can only setup failsafe on the throttle.
This is the worry of flying expensive machines when it goes wrong. I hope you find the…"
ContraSpec replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"Hi Robert,
at this present time it is very difficult to say what caused the crash, all i do know is that the helicopter did not respond to any inputs given to it.
the heli fell over backwards and flew headfirst into the ground, at approx 60km/h. i…"
DeveloperR_Lefebvre replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G
"Wow, that must have been hard!!! I've never broken a conrod on an airplane, even when the motors is driven underground.
So WK-H, you think you had a lockout, and the failsafe didn't work? What exactly did it do in the air?…"
ContraSpec replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"I have stripped the machine down and boxed it to investigate each component separately.
also after the crash, i had killed the power on the electronics to prevent further damage, we later decided to power up and see if anything responded, and…"
ContraSpec replied to ContraSpec's discussion DJI WK-H on Traditional Heli - X-Cell Spectra-G"DJI WK-H, and heli has done approx 4hrs of flying with the WK-H"
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