Recent content by sar104

That's correct. The MP2 doesn't rotate - it simply reinitializes the IMU yaw value to agree with the new, correct magnetic heading. https://mavicpilots.com/threads/compass-error-demonstration.66323/page-3#post-756214 I never saw this in more recent aircraft flight data, but without the DAT...

There is no need to do that. You can take actual flight data and easily compute the inertial navigation solution to compare with the actual position and velocity of the aircraft. That directly shows the accuracy that you could expect from the sensors in the aircraft.

It knows its heading and airspeed from the compass and tilt angle, but it can do better than that in terms of navigating without GNSS positioning. The accelerometers and rate gyros alone theoretically provide a full 3-D position and velocity solution, spoiled only by sensor drift, which is why...

There seems to be a lot of confusion about the availability of ADS-B data via apps, websites or ADS-B receivers. Data providers such as FlightAware, Flightradar24, ADS-B Exchange etc. can only display aircraft locations if they are receiving ADS-B broadcast by aircraft and received by...

I need to go hunting to figure out where I found those data.

I'll take a look and see how that compares. Stand by.

Not necessary - I have hundreds of logs. Here's a fairly recent example. This is a M2P flying into a 5 m/s (~12 mph) headwind, in P-mode. The tilt pegs at 25° with the speed around 13 m/s. See the data above. Could you approximate a number for "significant margin"? It is possible, of...

There have been numerous threads on this subject over the years, and one of the conclusions was that drag dominates aerodynamic lift for small quadcopter. I posted the following derivation and results back in 2018. If you skip the derivation and look at the results, it does show the expected...

It's as much of a control loop limit as maximum ground speed, and I can assure you that it is a limit that is often reached. It doesn't take much wind to peg the tilt angle on an upwind leg.

There is a de facto maximum airspeed because each mode has a maximum tilt angle, and airspeed is a function of tilt and density altitude.

Unfortunately Care has expired on mine. I'll open a ticket and see what they suggest. Since the main purpose of this aircraft is SAR, I could probably also live with manual FFC. I did a few more tests and it turns out that the shutter is partially closing on FFC. It appears to come in on a...

A few simple tests indicate that it is FFC failure, presumably due to the shutter not closing to perform the FFC. If I disable auto FFC and perform a manual FFC with a uniform temperature object filling the field of view, then the camera works fine. Performing an FFC with an actual view fails...

Well now my M2EA has suddenly started ghosting, across the entire field of view. FFC clears it, but as soon as the image moves the hottest and coldest regions of the image ghost again. I'm guessing from your dealings with DJI that it is a hardware issue.

When you tested during daylight did you have the lights switched on? Those lights will draw significant DC current, which will have an associated magnetic field that may well take the compass out of calibration.

Just kidding, and not a problem as I clearly am one. Just not used to being called on it. Except perhaps by Siri.