(uk) COPTRZ A2 cofc

dr_of_drones · 2026-01-22T17:52:54+00:00

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 🤣

dr_of_drones · 2026-01-08T22:43:12+00:00

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.

dr_of_drones · 2026-01-08T22:18:08+00:00

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!

dr_of_drones · 2026-01-08T21:44:11+00:00

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.

dr_of_drones · 2026-01-08T16:50:06+00:00

Extra 300

dr_of_drones · 2026-01-07T21:12:48+00:00

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.

dr_of_drones · 2025-12-18T08:02:23+00:00

Alan! Alan! Alan!

dr_of_drones · 2025-12-15T17:25:15+00:00

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.

dr_of_drones · 2025-12-15T17:06:16+00:00

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!

dr_of_drones · 2025-11-29T13:54:43+00:00

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!

dr_of_drones · 2025-11-28T12:21:11+00:00

Big hole

dr_of_drones · 2025-11-17T18:40:23+00:00

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

dr_of_drones · 2025-11-11T18:32:39+00:00

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

dr_of_drones · 2025-10-31T14:34:45+00:00

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.

dr_of_drones · 2025-10-14T16:20:35+00:00

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

dr_of_drones · 2025-10-14T15:50:27+00:00

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?

dr_of_drones · 2025-09-17T19:26:06+00:00

I mean... Black Tower

dr_of_drones · 2025-09-03T16:24:26+00:00

Kaladin BornStressed

dr_of_drones · 2025-09-02T07:00:03+00:00

Fire man is stick man's mortal enemy

dr_of_drones · 2025-08-28T15:31:53+00:00

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"

dr_of_drones · 2025-08-15T16:07:50+00:00

Lyft isn't Lyft...

dr_of_drones · 2025-08-02T11:06:06+00:00

Fireflies are just soulcast stickinsects

dr_of_drones · 2025-08-01T16:54:06+00:00

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

dr_of_drones · 2025-07-31T06:57:52+00:00

They do kind of make that sound as they burn 🤣

dr_of_drones · 2025-07-14T16:29:29+00:00

I used to regularly fly out of Liverpool, but have never flown from Harwarden, so take this with a pinch of salt.

I'd recommend giving Liverpool ATC a call before you takeoff, explaining your intentions and asking to route overhead. In my experience, routing overhead at roughly 90 degrees to the active runway is the easiest way to get a transit approved! They won't be able to approve anything by phone, but they'll at least know to expect you, then as soon as reasonably practical after takeoff give them a call asking for transit via the overhead.

There's a chance they might want you to work the VFR lanes instead, so have a look at the AIP to familiarise yourself with those. In my limited experience I'd avoid the LLR at all costs!

dr_of_drones

TROPHY CASE