Hello everyone
I've got a MK hexa xl kit that I've just finished putting together, and it tries to flip on takeoff. I'm running + config with Arducopter 2.1 firmware.
I checked out the motors with the CLI command, calibrated ESC and radio. In APM Planner setup inputs from the radio are correct.
The hand test gives a first problem: the pitch is reversed (pitch stick forward and hexa points back with motor 1 faster) so I set to reverse on the radio. (but the motors command in CLI give me all ok...)
At take-off throttle gently tilts the hexa, with strong throttle gets going right and then almost stabilized in flight with a tendency to always go to the right. Each time, not to miss the exa, I have come down with a crash.
The motors are MK3638 with propellers 13x4.5 CF with payload a GoPro . Lipo 3S
The propellers are too powerful and create instability? For a total weight of about 2.5 kg such propellers are recommended?
In bench tests, in APM Planner status I see with minimal throttle trigger all channels 1-2-3-4-7-8 in 1189 but with more throttle only increase the channels 1-3-8. Is it OK that arducopter run a hexa take off as a tri?
I am a little frustrated because after 4 attempts at flights I broke about a dozen propellers and an arm of the frame.
Replies
Hi to all
these are the video of two first flights; in the first probably i dosed wrong the throttle but on the second the hexa go independently to the right
To see the video use passwd volo
http://vimeo.com/34703567
http://vimeo.com/34703660
I rate batteries to how much drained with current over time at a given voltage.
Work is HP.
If your batteries need more power recharge over time maybe they are failing or need to be replaced.
Thanks to all
the battery is a 3s lipo with 50C discarge rate (nanotech 6000mAh)
I think it's a software problem because all the engines running and there is not brown out on esc.
Takeoff (simulated without propellers) all engines running with outputs 1189; more throttle,only the engines 1, 3 and 8 increased speed. But if I change manually the tilt, all engines are controlled by apm.
Then I can not explain why the test engine is correct and in flight the pitch is reversed
In your setup you must use "APC SlowFly 12x3.8" and 4s lipo for better performance.
I run a similar setup in Y6 config. I found flying it on 3s was super difficult, try switching to 4s and re-doing the entire assembly regarding the APM. Another thing, if your comfortable try loading the firmware from Arduino rather than the mission planner. I almost exclusively do it this way since the mission planner always gives me problems.