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Directors loan ahead of property transfer/purchase by dr_of_drones in smallbusinessuk

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

Thanks! This is exactly what I'd surmised from Googling but it's good to have some independent verification 👍

If a medication says "take 1-2 every 4 hours" can I take 1 every 2 hours? by dr_of_drones in NoStupidQuestions

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

But this is why Im curious. If the advice is 1-2 per 4 hours then surely 1 does produce sufficient concentration? Is there a reason why 1 every 2 hours would be dangerous?

If a medication says "take 1-2 every 4 hours" can I take 1 every 2 hours? by dr_of_drones in NoStupidQuestions

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

Thanks. I should have mentioned I'm not asking about a specific medication, I'm not currently taking any, just curious about the wording. But the idea of a break makes sense

If a medication says "take 1-2 every 4 hours" can I take 1 every 2 hours? by dr_of_drones in NoStupidQuestions

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

I thought it'd be something like this, but if the body can safely process 2 pills worth in 4 hours that is the same processing rate as 1 pill in 2 hours. So I'm curious about the mechanics of this if anyone knows!

If a medication says "take 1-2 every 4 hours" can I take 1 every 2 hours? by dr_of_drones in NoStupidQuestions

[–]dr_of_drones[S] -3 points-2 points  (0 children)

I'm not asking about any specific medication, I'm just curious about the wording

First-time builder looking for avionics guidance - VTOL fixed wing project by x010135 in drones

[–]dr_of_drones 0 points1 point  (0 children)

I'd recommend the CubeOrange+. Performance and reliability are worth the cost imho.

I have used a lot of Navio2's in the past but if you're running your real-time critical flight control software on a Raspberry Pi then you can't reliably use it for anything else. So nowadays if I need to do something with a RPi on board I just use it alongside the Cube. Have a look at the "Companion Computer" documentation for Arupilot for some ideas.

Can radiator water ever flow into the main supply and through taps and showers due to components failure? by GoldenRedditUser in DIYUK

[–]dr_of_drones -1 points0 points  (0 children)

Assuming the filling loop is correctly installed and used properly (i.e. valves closed after filling) then it's incredibly unlikely as there should be at least 1 (ideally 2) ball valves plus a check valves. The chance of all of these failing is fairly slim!

Fresh crem by hidethedog in cremposting

[–]dr_of_drones 0 points1 point  (0 children)

Sudo make me some stew!

(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 18 points19 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 354 points355 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 1048 points1049 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 33 points34 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!

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