Tracking propellers rpm

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vasilije_k Posted at 9-7 23:24
Motors are propellers right? If so those are probably exactly what I need. But is there a way to extract those files on newer drones? I will probably be working on Mavic 3 Pro, so probably right now that will be my only concern.

For the Mavic 3 series and the Air 2 & 3 series you will need to get  DATs from their screen device and try processing them with CsvView. I do not know if their screen device DATs are readable.
Motor rpm equates to propeller rpm since the propellers or propellor blades attach directly to the motors.

If the screen device DATs from those drones are encrypted i.e unreadable, then your best bet for a 'large drone' would be a Go4 control App using drone with a similar weight and prop tip radii and check their screen device for DATs.
Specifically a Mavic 2 Pro or zoom with an RC1A controller, DO NOT get a M2 pro or zoom with an RC1B controller. The RC1B does not create  DAT's on the connected phone/tablet.
I do not know whether or not the relevant smart controller creates DATs and you might lose the rpm display of the RC1A/B controllers.

If this is a university type project and Serbia is using EU regulations I suspect you might be better of with a Mini 3 Pro. I imagine you would HAVE to be legally compliant for a university project and you would probably be able to legally fly a Mini 3Pro in places where you could not legally fly a drone heavier than 250g.

Background reading
https://mavicpilots.com/threads/mavic-flight-log-retrieval-and-analysis-guide.78627/ and many of the posts by Sar104,  BudWalker, Slup and possibly boblui  ( https://mavicpilots.com/members/boblui.124913/  ) I seem to remember boblui writing some good stuff but he seems to have dropped of the forum.
Sar104's posts are probably your best bet.
I think Msinger ( again a Mavicpilots website user) is responsibly for the PhantomHelp .txt log website. It might be worth talking to him to see what he had to do to get the whatever that is necessary to decrypt the FLY app drones .txt logs, he might be able to point you in the correct direction regarding contacts in DJI.

If this is bachelor or higher degree level stuff that you are doing then I'd be inclined to ask the DJI mods if they can put you in direct contact with DJI's engineers, though you might need to be a whizz kid for that to happen, I'd bet there engineering department is awash with higher degree holders.

Boardburner2:
Kv is dictated by the required rpm of the motor and the voltage of your battery supply.

Rpm is normally in the 1500 to 2000 range for a quad.

It totally depends on the size type and pitch of the props, the supply voltage, the thrust required
and the degree of aerobatic performance wanted.

I've got a quad with Kv 15000 rpm motors or so, but its tiny.

There are calculators for this kind of thing on the web, and specialist quadcopter forums will be a
much better place to hunt for this kind of knowledge. You will either need to know the parameters I've
mentioned already, or else be prepared to get props and power pack to match the motors. The whole
powertrain needs to be matching to get a workable system, there is not much wiggle room.

For more information, please visit weight of a drone.