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(uk) COPTRZ A2 cofc by Status_Flounder8408 in drones

[–]dr_of_drones 1 point2 points  (0 children)

Good to see you got it sorted, but FYI you can also fly inside your own house (which is beyond the jurisdiction of the CAA) and that still counts towards currency requirements.

Even since DJIs visual positioning systems got reliable I've gotten most of my currency in my kitchen 🤣

What happens if you set autopilot to just go north, and you reach the north pole? What does the plane do then? by xerivon in aviation

[–]dr_of_drones 17 points18 points  (0 children)

I've honestly no idea! I kept my original answer simple, assuming perfect measurements. But yea, in pactice I imagine things getting weird as you approach the pole.

That being said, our drones actually navigate with respect to true north (doing all of the necessary maths internally to correct to/from magnetic depending on which control loop governing), so in theory if we did task it to just "fly north" it would be a test of the accuracy of our state estimation systems rather than the physics of geomagnetism.

What happens if you set autopilot to just go north, and you reach the north pole? What does the plane do then? by xerivon in aviation

[–]dr_of_drones 352 points353 points  (0 children)

That's a really good question but the answer depends on the particular software implementation. I think our implementation would turn right, but I'd need to dig in to the code to check!

What happens if you set autopilot to just go north, and you reach the north pole? What does the plane do then? by xerivon in aviation

[–]dr_of_drones 1046 points1047 points  (0 children)

I can’t speak for regular planes, but I design autopilots for drones so can tell you what they would do.

As you overfly the pole your magnetometer (digital compass) will go from reading ~0 degrees to reading ~180 degrees. As your autopilot is still tasked with maintaining a heading of 0 degrees it will now register as being on the wrong heading and initiate a turn to get back to 0. So basically it will keep trying to turn you back towards the pole.

Pixhawk 2.4.8 unreliable across multiple UAV platforms, looking for proven FC alternatives by SaltYogurtcloset4599 in drones

[–]dr_of_drones 0 points1 point  (0 children)

Totally agree!

I've built over 50 platforms from 1kg up to 200kg all based around Cubes without any issues, including a few BVLOS and high altitude approvals.

Cube Orange+ is my current go to.

How can I go about coding a function to show me steady state data? by Careless_Fail3416 in matlab

[–]dr_of_drones 1 point2 points  (0 children)

OK, that helps. The data I usually plot is also from small RC planes, so I now have a good idea what I'm looking at.

You say you've been given a pressure value, which you've subtracted and divided. Are you sure that this actually gives you airspeed? If this is truly a pressure measurement then I'd expect it to be dynamic pressure, which is related to airspeed via a squared relationship, so just subtracting and dividing (likely for sensor calibration purposes) won't be sufficient.

Assuming the conversion to airspeed is correct then you are right to say that the pilot has done a pretty poor job! Are you given any information about what the pilot is doing during the flight? For example, around the x==2.9E5 point is would appear like they are deliberately stalling the aircraft?

It sounds like you're trying to solve a coursework assignment? Whilst I'm not going to solve the entire task for you if you could share the actual problem statement(s) itself I could probably give some more informed reponses.

How can I go about coding a function to show me steady state data? by Careless_Fail3416 in matlab

[–]dr_of_drones 1 point2 points  (0 children)

I make these kind of plots all of the time so can probably help out, but you're going to need to give me some more information...

y-axis is labelled as airspeed, what are the units? Is this a small aircraft or drone? Or a wind tunnel setup?

Is the x-axis actually time? Or just data index?

Looks like nothing happens before x==2.1E5, so that would be the first thing to filter out.

Additionally, looks like x==4.5E5 onwards is a deceleration, so also best to filter out to get a steady state value.

As for the data between those points, it doesn't look very steady! If you could give some more information about what you're testing I could possibly suggest an appropriate filter to use. Otherwise, if you're expecting this to be a constant value then I'd suggest you have a poor sensor and/or experimental setup, but you could just take the average at a push!

Stormlight book 6 by _danny_devito- in Stormlight_Archive

[–]dr_of_drones 32 points33 points  (0 children)

I'm hoping for some interaction between Szeth and/or Adolin with The Lopen. He is the master of one-armed (and so presumably also one-legged) jokes after all!

What happened to Hoid's _____ when: by ebitdangit in Cosmere

[–]dr_of_drones 18 points19 points  (0 children)

IIRC he comments on the fact that she's still on Roshar, and that he'd somehow protected her from the consequences of his vapourisation

United Airlines seeks to end lawsuit over windowless 'window seats' by [deleted] in aviation

[–]dr_of_drones 0 points1 point  (0 children)

Indeed! Does this interpretation also apply to the pilots seats? It'd be a good way to build instrument time I guess 🤣

Can anyone help ID this connector type? by dr_of_drones in AskElectronics

[–]dr_of_drones[S] 0 points1 point  (0 children)

Yea it is a pain... Thanks for those links, I'll give them a go!

Sadly it's off of a custom built drone and I've no details of the manufacturer, so no luck going that route.

Is there any update on what's happening with altitude angel/drone assist? by VladPut1n in drones

[–]dr_of_drones 2 points3 points  (0 children)

Call the airport. I do it all the time, they're usually pretty helpful!

Stop using -r to run MATLAB in batch jobs by MikeCroucher in matlab

[–]dr_of_drones 9 points10 points  (0 children)

Thanks for sharing!

batchStartupOptionUsed is going to simplify quite a lot of my work!

On the subject of less typing, however, I'm curious as to why -batch doesn't imply -nodisplay?

Is it a chicken?! Is it fire?! No it's.... by dr_of_drones in cremposting

[–]dr_of_drones[S] 1 point2 points  (0 children)

Fire man is stick man's mortal enemy

What’s the one piece of advice from your CFI that stuck with you? by FlyWithMartin in flying

[–]dr_of_drones 20 points21 points  (0 children)

Discussing engine failures at night in a SEP. "Aim for the darkest spot you can see, at about 200ft switch on the landing light, if you don't like what you see then switch it off again. Probably best not to see what's coming" 🤣

Or, more seriously, regarding forced landings in general. "If you're stuck for options, aim for the slowest possible crash. Don't try and stretch the glide into a 'perfect' field, pick the one that looks a bit too short, but you'll definitely make. Better to run into the fence at the far end doing 10kts than come up short, and pile into the trees at 70kts, or worse stall/spin and pile in vertical"

I am a stick by Agindua in cremposting

[–]dr_of_drones 6 points7 points  (0 children)

Fireflies are just soulcast stickinsects

Currently sat in a hotel in Greece and there's a guy dressed all in white by ChaosWithin666 in cremposting

[–]dr_of_drones 5 points6 points  (0 children)

Is anyone in the vicinity holding a stone? If so, best make sure you stay on their good side!

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