Recent content by BudWalker

Too bad we don't have access to the .DAT

You could get close to measuring thrust as a function of motor RPMs. Attach a weight on a cord tied to the airframe. Try to get it close to the CG. When the AC is hovering the total thrust will be the attached weight + airframe weight. Thrust / RPM for a single motor will be ((attached weight...

Perhaps you could say a little more about your project? Are you talking about individual motor/prop thrust? I suspect that motor RPM is mostly linear with thrust. Might be difficult to determine units though. Similarly, is it individual motor/prop torque or airframe torque?

But it's not random in the sense that some members don't have to work very hard to see the problem. I tried a lot of combinations but couldn't make my Mini 4 Pro oscillate.

If your RC2 is set to sync with DJI then you can use AirData or PhantomHelp log viewer to retrieve the .txt from DJI.

Can you provide the .txt log for this flight?

I expect so.

DJI Goggles Integra with Motion 2 Combo. Used for 2 or 3 flights with my Mini 4 Pro. Just could not get the Integra Goggles to fit my head. $200 you pay for shipping Purchased from DJI. Padding has been upgraded to DJI Goggles Foam Padding (Soft Fit) Buy DJI Goggles Integra Motion Combo - DJI...

Just got back from doing a test flight. Tried forwards, backwards and sidewards. Full and partial stick input. Bypass, no OA and Sport modes. Into the wind, down wind and cross wind. Didn't see any evidence pitch oscillations. I feel cheated.

I use CsvView. It's free and can be obtained here https://datfile.net/CsvView/downloads.html First use the PhantomHelp Flight Log Viewer DJI Flight Log Viewer | Phantom Help Then download the .csv that it creates Finally, submit that .csv to CsvView

I think they are probably talking about the use of the PhantomHelp viewer to create the .txt to .csv and, then, CsvView to view the .csv. You might try providing the .txt log file instead and suggest they use their proprietary software to analyze it.

Another example of this behavior was posted over on DJI forums Mini 4 pro oscillating This one is a little more interesting as it shows also a longer period oscillation in horizontal speed.

Don't know about flying sideways, backwards or Bypass mode. I'll be heading out a little later to do some test flights.

Just discovered that my Mini 4 does this but corrects itself before it gets to be a problem. The top plot shows the same 2.5 Hz oscillations starting at 186.7 secs but then stopping at 189 secs. Also seen in the bottom plot is the horizontal speed decreasing some and the vertical speed...

Some may want to follow this over on the DJI forum. DJI is claiming this is normal behavior. Mini 4 pro oscillating