A 1km sheet, at an altitude of 300 km would have an angular size of 11 arc minutes, or 1/3 the apparent size of the moon. The resolution of the naked eye is about 1 arc minute, so all you have is a 121 px thumbnail, although based on being able to see detail on the moon, there's a lot of anti-aliasing going on!
To get a decent thumbnail, say 64x64 px so we can identify the Pepsi logo properly, we'll need a screen 5.8 km square. At that size, tidal accelerations are only about +- 0.015 m/s^2 (0.15% of a g), but it'll be enough to cause problems trying to keep a infinitesimally thin sheet flat planar.
10 micron mylar is also 13.6g/m^2. We won't need it that thick - assume 0.1 micron - so a 5.8 km square sheet will have a mass of 4.57 tonnes, or 1.1 kg per cubesat.
I set out to debunk this with numbers, but it's not necessarily completely impossible, just an insanely stupid waste of money. I suppose they could dress it up as a sponsored solar sail test.
I have had to use a compass, in the Lake District, in the snow, on my own. Not the cleverest thing to do. There were five paths going away from a cairn so I too a compass bearing from the map. Unfortunately 72 deg leaves a lot of ambiguity and I ended up walking into the wrong corrie (cirque) as tarns can look very similar in the snow. It was only when I got half way down that I realised that "those peaks shouldn't be visible from here".
The duty on fuel in the UK 57.95 pence per litre and we pay 20% VAT on top of that. So the 1.226 GBP we pay for a litre of petrol includes 0.784 GBP tax.
The government is also pushing electric cars and are set to loose a vast amount of revenue. Tax regimes will have to change to deal with that, similarly speed fine revenue will have to be supplemented with a new stream when this comes in.
In many places in the UK that'd be a bonus as most local roads are national speed limit (60mph) but A&B roads may be 50mph. Although I can think of one place where the northbound M40 runs parallel to a 60 zone, but the distance between the two is 20 metres which nowadays is a big GPS error.
Pedant alert... The UK Highway Code Rule 163 explicitly states "Overtake only when it is safe and legal to do so", so if you have to speed to overtake somebody then it's not meeting that requirement, and you shouldn't overtaking.
Right, so you have a choice of running the org as well as the systems and likely making mistakes that will leave your systems open, or spending all your time keeping up-to-date on all the CVEs and keeping your systems nice and secure, leaving no time to run your cartel.
I suppose you could delegate the running of the cartel to a subordinate, but that leaves you at the risk of being screwed over by those under you. This applies to every part - don't trust the people in the warehouse, do it yourself. The Sinaloa Cartel has (had) an estimated 50-60 thousand people involved - that's about the same size as AstraZeneca, an Anglo–Swedish multinational pharmaceutical. Would you expect a CEO or director to be the sysadmin of a multinational?
No, the police admitted that some of the drones may have been police drones. That's very different from "the police admitted that there may not have been a drone originally". It's just the way the headlines were written. Take the Torygraph, for example, and then compare the 1st paragraph of the actual article.
Some of the drone sightings which kept Gatwick Airport on lockdown for 36 hours may have been reports of Sussex Police's own aircraft
Like you say however, it'd be very easy to build a drone that uses a single nitro engine and collective pitch, controlled via a 3g card with programmed "random" 3d flying for maximum unpredictability and disruption, and is capable of returning to a predefined landing zone (extra points if it randomly selects which zone and notifies the operator).
And badgers. I need to get a few badger decals for the side of my car. My reputation obviously now precedes me - I had a badger have a go at me (hiss/growl/bark) when I cycled passed it.
I thought the same, but then I looked at the numbers. A Mooney M20 has a skin thickness of 0.025" at the tip increasing to 0.04" at the inner 50% of the wing*. The skin thickness of an A340 at the leading edge slats is 1mm (2mm for an A320)**. 0.04" is 1.0.16mm, so the thickness is about right (the video shows the impact where the thickness to chord ratio is fairly high, which suggests near the root).
Leading edge curvature may also effect the results. A relatively thin wing will have a higher curvature which tends to be stronger than a thicker wing.
Another factor is the damage caused to the systems. The damage caused to the M20 will cause airflow to separate early, so the area behind the impact is unlikely to generate much lift. That's obviously bad. For a commercial aircraft, you're also damaging the slats which are generating a significant amount of extra lift (assuming the impact is at low level), as well as reducing the lift along the wing. Of course, the larger the wing, the smaller the percentage of lift lost due to damage will be.
Ignoring the fact you missed the point of the study, you're right about people not wanting to jump out of aircraft.
A colleague's father was an RAF fighter pilot during WWII. He received a commendation for bravery for flighing a heavily damaged aircraft back. In reality he apparently went to bail out, got his legs over the side and went "fuck that, there's no way I'm jumping", and nursed the aircraft home.
That is definitely a valid point. I suppose you could go with iron or aluminium filings, but that could cause electrical issues in a car and open you to liabilities. Very fine sand could be very annoying as it gets into everything.
You have a strange definition of bomb. It was a bowl of glitter that was spun with a motor to fling the glory out radially. It's pretty obvious from the video.
My experience as both a cyclist and driver is that a well maintained bike certainly makes a difference to your speed. With a poorly maintained car you just need to put your for down a little further to increase your speed. That's it, no effort required (apart from the extra cost).
The OP explicitly said Dublin, so it's safe to assume that they meant Ireland. Filtering is legal (or at least isn't illegal) and in Advanced Stop Lines (which provide an area for cyclists at lights, behind which motorists must stop) are becoming more and more common in both the UK and Ireland (and probably plenty of other countries).
Yeah, it's a pet hate of mine being overtaken by somebody only to cut across me when turning left (or stopping immediately in front). I also upset other drivers (when driving) by not overtaking cyclists at the soonest possible moment. You can't win!
Cycling two abreast isn't generally an issue, even on the narrow roads where I am. Two cyclists tend to be narrower than a car, so if you can pass a car coming the other way you can pass them. Admittedly you may not be obeying the statutory 1m gap, but it's quicker to pass them as it's a shorter distance, which can be important as narrow roads trend not to be very straight.
Nobody's calling all right wingers cry babies, just calling out the right wingers who are cry babies.
Take for instance a right wing colleague who is the biggest snowflake I know. He lives to get angry about shit that doesn't affect him, he claims to not be bothered by gay people, but rants about anything gay-related in the news. He whines "what about my free speech" but gets annoyed when others use their right to free speech.
I don't think he's the epitome of the right wing, but the fact that he is the type of person he purports to hate amuses me to no end. This is who we are calling out.
Water content depends on the temperature too, so you only get 30 g per m^3 at 30 deg and 1 atm. If the temperature is lower you get less. So your estimate of 20 g in the UK is most likely too high (unless it was 30 deg near you). Yesterday it was 18 deg and 64% RH at my local RAF base, which gives only 10 g/m^3.
Anyway, take Nairobi, today it'll be 24 deg and 38% RH, which gives 9 g/m^3, in the evening it'll be 18 deg and 72% RH, which gives 11 g/m^3 (about the same which makes sense). So the volume flow through the container will need to be 200,000 m^3 per day, which is about 3,000 cycles per day. To be fair, while that sounds like a lot, 200,000 m^3 per day is only 2.3 m^3/s. To put that into perspective that's 1 m/s airflow through a 1.5 x 1.5 metre aperture.
The other thing to look at is the power consumption - a portable "industrial" dehumidifier extracts 70 litres / day, consuming 1.35 kW - that is 0.466 kWh / litre. We'll be generous and assume this device is twice as efficient, so that gives us 466 kWh to provide 2,000 litres of water, which is just under 20 kW power consumption.
The numbers don't sound altogether unreasonable. Unlike so of the other water out of air "solutions" - *cough* WaterSeer - they're not assuming they can do it passively, so that's a start...
I'd like to see the reaction of the police when they come across a horse rider on a UK dual carriageway which has a national speed limit (70 mph). Take the A34 (a road I know all too well), people doing 70+, no hard shoulder, just soft gravelly margins. I don't think I've even seen a cyclist (even though there are cycle crossings on some slip roads), and they don't have to worry about their mode of transport getting skittish.
If they're going to switch anything, it should be the phone layout to the number pad. Nearly every phone has recent calls and phone books. Mobiles have the bonus of voice dialing. In fact, many people I know don't even have a phone plugged into their landline.
Our desk phones can be dialed from our CRM software - we trialled SIP clients only (all the phones have wireless headsets), but we found people were missing calls as the headset notification was too discrete (as was the windows notification). It was also impossible to reject a call, though I filed a bug report with the vendor.
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A 1km sheet, at an altitude of 300 km would have an angular size of 11 arc minutes, or 1/3 the apparent size of the moon. The resolution of the naked eye is about 1 arc minute, so all you have is a 121 px thumbnail, although based on being able to see detail on the moon, there's a lot of anti-aliasing going on!
To get a decent thumbnail, say 64x64 px so we can identify the Pepsi logo properly, we'll need a screen 5.8 km square. At that size, tidal accelerations are only about +- 0.015 m/s^2 (0.15% of a g), but it'll be enough to cause problems trying to keep a infinitesimally thin sheet flat planar.
10 micron mylar is also 13.6g/m^2. We won't need it that thick - assume 0.1 micron - so a 5.8 km square sheet will have a mass of 4.57 tonnes, or 1.1 kg per cubesat.
I set out to debunk this with numbers, but it's not necessarily completely impossible, just an insanely stupid waste of money. I suppose they could dress it up as a sponsored solar sail test.
I have had to use a compass, in the Lake District, in the snow, on my own. Not the cleverest thing to do. There were five paths going away from a cairn so I too a compass bearing from the map. Unfortunately 72 deg leaves a lot of ambiguity and I ended up walking into the wrong corrie (cirque) as tarns can look very similar in the snow. It was only when I got half way down that I realised that "those peaks shouldn't be visible from here".
The duty on fuel in the UK 57.95 pence per litre and we pay 20% VAT on top of that. So the 1.226 GBP we pay for a litre of petrol includes 0.784 GBP tax.
The government is also pushing electric cars and are set to loose a vast amount of revenue. Tax regimes will have to change to deal with that, similarly speed fine revenue will have to be supplemented with a new stream when this comes in.
In many places in the UK that'd be a bonus as most local roads are national speed limit (60mph) but A&B roads may be 50mph. Although I can think of one place where the northbound M40 runs parallel to a 60 zone, but the distance between the two is 20 metres which nowadays is a big GPS error.
Pedant alert...
The UK Highway Code Rule 163 explicitly states "Overtake only when it is safe and legal to do so", so if you have to speed to overtake somebody then it's not meeting that requirement, and you shouldn't overtaking.
https://www.gov.uk/guidance/th...
Right, so you have a choice of running the org as well as the systems and likely making mistakes that will leave your systems open, or spending all your time keeping up-to-date on all the CVEs and keeping your systems nice and secure, leaving no time to run your cartel.
I suppose you could delegate the running of the cartel to a subordinate, but that leaves you at the risk of being screwed over by those under you. This applies to every part - don't trust the people in the warehouse, do it yourself. The Sinaloa Cartel has (had) an estimated 50-60 thousand people involved - that's about the same size as AstraZeneca, an Anglo–Swedish multinational pharmaceutical. Would you expect a CEO or director to be the sysadmin of a multinational?
No, the police admitted that some of the drones may have been police drones. That's very different from "the police admitted that there may not have been a drone originally". It's just the way the headlines were written. Take the Torygraph, for example, and then compare the 1st paragraph of the actual article.
Source: Gatwick Airport drone sightings may have been of police equipment, chief constable admits
Some of the drone sightings which kept Gatwick Airport on lockdown for 36 hours may have been reports of Sussex Police's own aircraft
Like you say however, it'd be very easy to build a drone that uses a single nitro engine and collective pitch, controlled via a 3g card with programmed "random" 3d flying for maximum unpredictability and disruption, and is capable of returning to a predefined landing zone (extra points if it randomly selects which zone and notifies the operator).
And badgers. I need to get a few badger decals for the side of my car. My reputation obviously now precedes me - I had a badger have a go at me (hiss/growl/bark) when I cycled passed it.
See my post above. An A340's slats are about the same skin thickness as a Mooney M20 wing.
I thought the same, but then I looked at the numbers. A Mooney M20 has a skin thickness of 0.025" at the tip increasing to 0.04" at the inner 50% of the wing*. The skin thickness of an A340 at the leading edge slats is 1mm (2mm for an A320)**. 0.04" is 1.0.16mm, so the thickness is about right (the video shows the impact where the thickness to chord ratio is fairly high, which suggests near the root).
Leading edge curvature may also effect the results. A relatively thin wing will have a higher curvature which tends to be stronger than a thicker wing.
Another factor is the damage caused to the systems. The damage caused to the M20 will cause airflow to separate early, so the area behind the impact is unlikely to generate much lift. That's obviously bad. For a commercial aircraft, you're also damaging the slats which are generating a significant amount of extra lift (assuming the impact is at low level), as well as reducing the lift along the wing. Of course, the larger the wing, the smaller the percentage of lift lost due to damage will be.
* Mooney M20 Skin Thickness
** A320/A340 Skin Thickness
Ignoring the fact you missed the point of the study, you're right about people not wanting to jump out of aircraft.
A colleague's father was an RAF fighter pilot during WWII. He received a commendation for bravery for flighing a heavily damaged aircraft back. In reality he apparently went to bail out, got his legs over the side and went "fuck that, there's no way I'm jumping", and nursed the aircraft home.
That is definitely a valid point. I suppose you could go with iron or aluminium filings, but that could cause electrical issues in a car and open you to liabilities. Very fine sand could be very annoying as it gets into everything.
How about (10^4899)^4899
You have a strange definition of bomb. It was a bowl of glitter that was spun with a motor to fling the glory out radially. It's pretty obvious from the video.
My experience as both a cyclist and driver is that a well maintained bike certainly makes a difference to your speed. With a poorly maintained car you just need to put your for down a little further to increase your speed. That's it, no effort required (apart from the extra cost).
The OP explicitly said Dublin, so it's safe to assume that they meant Ireland. Filtering is legal (or at least isn't illegal) and in Advanced Stop Lines (which provide an area for cyclists at lights, behind which motorists must stop) are becoming more and more common in both the UK and Ireland (and probably plenty of other countries).
Yeah, it's a pet hate of mine being overtaken by somebody only to cut across me when turning left (or stopping immediately in front). I also upset other drivers (when driving) by not overtaking cyclists at the soonest possible moment. You can't win!
Cycling two abreast isn't generally an issue, even on the narrow roads where I am. Two cyclists tend to be narrower than a car, so if you can pass a car coming the other way you can pass them. Admittedly you may not be obeying the statutory 1m gap, but it's quicker to pass them as it's a shorter distance, which can be important as narrow roads trend not to be very straight.
Nobody's calling all right wingers cry babies, just calling out the right wingers who are cry babies.
Take for instance a right wing colleague who is the biggest snowflake I know. He lives to get angry about shit that doesn't affect him, he claims to not be bothered by gay people, but rants about anything gay-related in the news. He whines "what about my free speech" but gets annoyed when others use their right to free speech.
I don't think he's the epitome of the right wing, but the fact that he is the type of person he purports to hate amuses me to no end. This is who we are calling out.
Water content depends on the temperature too, so you only get 30 g per m^3 at 30 deg and 1 atm. If the temperature is lower you get less. So your estimate of 20 g in the UK is most likely too high (unless it was 30 deg near you). Yesterday it was 18 deg and 64% RH at my local RAF base, which gives only 10 g/m^3.
Anyway, take Nairobi, today it'll be 24 deg and 38% RH, which gives 9 g/m^3, in the evening it'll be 18 deg and 72% RH, which gives 11 g/m^3 (about the same which makes sense). So the volume flow through the container will need to be 200,000 m^3 per day, which is about 3,000 cycles per day. To be fair, while that sounds like a lot, 200,000 m^3 per day is only 2.3 m^3/s. To put that into perspective that's 1 m/s airflow through a 1.5 x 1.5 metre aperture.
The other thing to look at is the power consumption - a portable "industrial" dehumidifier extracts 70 litres / day, consuming 1.35 kW - that is 0.466 kWh / litre. We'll be generous and assume this device is twice as efficient, so that gives us 466 kWh to provide 2,000 litres of water, which is just under 20 kW power consumption.
The numbers don't sound altogether unreasonable. Unlike so of the other water out of air "solutions" - *cough* WaterSeer - they're not assuming they can do it passively, so that's a start...
I'd like to see the reaction of the police when they come across a horse rider on a UK dual carriageway which has a national speed limit (70 mph). Take the A34 (a road I know all too well), people doing 70+, no hard shoulder, just soft gravelly margins. I don't think I've even seen a cyclist (even though there are cycle crossings on some slip roads), and they don't have to worry about their mode of transport getting skittish.
+1 - missed that...
If they're going to switch anything, it should be the phone layout to the number pad. Nearly every phone has recent calls and phone books. Mobiles have the bonus of voice dialing. In fact, many people I know don't even have a phone plugged into their landline.
Our desk phones can be dialed from our CRM software - we trialled SIP clients only (all the phones have wireless headsets), but we found people were missing calls as the headset notification was too discrete (as was the windows notification). It was also impossible to reject a call, though I filed a bug report with the vendor.
You seem very sure about that. Why?
I can't be the only person to consider prime notation like in calculus for derivatives, eg moon, moon', moon'', etc.