DroneDriver
lvl.4
Flight distance : 1164226 ft
United States
Offline
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Balance is not the only reason you can get vibration from props.
TRACKING is just as important.
The blades need to be traveling in the exact same plane:
Using a flashlight look at the tips of the blades at an even eye view, horizontally. You should see smooth lines as the props follow in each others' paths. If you see a wide swath that clearly shows two separate paths, revealing both blades...BAD TRACKING. Very inefficient and generating an air pushing condition between the tracks. They are buffeting each others airflow, resulting in vibration with a perfectly balanced set of props.
The painted lines on the props are there to help spot the tracking. And you thought they were just to be cool looking? If you see multiple levels with the lines, BAD TRACKING.
What can you do with a set of "bad trackers"? Throw them away! You cannot track a set of DJI blades or ANY other Mavic Pro type blade,
The fix in the real world is using a strobe light shooting at the area defined above, which by timing show one blade at a time, essentially, visibly "stopping" the blade for easy reference for adjustment as in setting the timing on a cars ignition, procedures.
The blades are physically stopped turning and adjustments are made.
Adjustments are made by bending a small, tab near the end of the prop, designed and built into the prop.
Careful trial and error will result in perfect TRACKING.
Hopefully that will shed some light onto the subject. Pun intended.
I am not the smartest guy, here. I do have a good memory as I spent 10 intimate years with Apache helicopters as an engineer.
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