General > General Technical Chat
Working From Home - Impacts of Coronavirus
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Electro Detective:

--- Quote from: bd139 on April 29, 2020, 07:25:01 am ---It was obvious our disaster capitalists were up to something based on some stock tanking and our eminent exit from the EU so I figured being the rat I am I’d jump off the sinking ship ASAP. Didn’t bet on the rest. That was just luck, from my perspective anyway.

The issue is going to be when the death count flat lines. I’m not sure there is enough data yet to determine causality between that and either (a) the thing has burned out and (b) lockdown actually worked.
That’s a catch-22 that our political elite has managed to talk itself into a corner on with lies and promises.

The shit show hasn’t actually begun yet. Watch the slow unwinding and marketing. Will see what we have lost an about 5 years I reckon.
Keeping on topic I suggest a lot of us will never return to an office and a lot of us will never return to work.
So that’s a whole new problem to deal with which isn’t going to fit into neoliberal ideology.

The take home for me from all this is stay healthy and assume that there is no safety net.


--- End quote ---

That's a good 'safety' gig mate  :-+


The lower level pooliticals aka 'in public view cannon fodder', are shafted either way, they let it play out way too long. 

so whether they pull the plug now (YES PLEASE ffs)

or keep rolling with it because their mates in businesses and govs that have invested or stupidly borrowed big, to quickly catch the wave to play the crisis supply game,

will be caught with their pants down with no more crisis supply demand, and looking for poolitical heads to roll

or something like that..


i.e. it's coming and won't be pretty for them, or us

btw do these polyticks clowns even wear masks, scrub their hands, one seat space gaps in limos,
and practice Safe Social Distancing at the Lodge bar?  :-//




EEVblog:

--- Quote from: james_s on April 28, 2020, 05:10:57 pm ---They sure are nice to fly on though, and significantly faster than the large twins that are taking over those routes. I'll be really sad to see the 747s go.
--- End quote ---

Got to fly one for the last time late last year on a return flight from Melbourne. Flights into Sydney were being cancelled because of high wind, so we were delayed most of the day. In the end the airline said "bugger this, bring in a 747" and they allowed that to fly in. They actually publicly announced that as the reason they switched planes.
paulca:

--- Quote from: james_s on April 28, 2020, 08:41:38 pm ---My recollection was that the 747 was about 50mph faster than most of the twins, a few years ago my friend was on a 747 going from England to the US and the captain mentioned at one point that they were overtaking the 777 that took off some time before from the same airport. I don't actually know the reasons, just that the 747 is typically flown a bit faster.

--- End quote ---

They use a metric called "Cost Index" on the flight management computer to control the speed or rather power settings for different phases.  They also have de-rates for takeoff and climb power.  For take off this is about using the maximum power required to be able to reject a take off and stop on the runway, but still make it safely into the air.  These are more about saving the engines which suffer more wear at higher EPR and RPM settings.

Cost Index is a 0-1.0 co-efficient between the cost of operating the aircraft per hour and the cost of fuel per hour.  If fuel is very expensive on a route, they might fly with it closer to 0.0.  If time is more expensive they might fly with it set to 1.0.

Due to the jet stream on atlantic crossings they typlically use 1.0 while heading west into the wind and 0.0 when heading east with the wind.

Even at that the difference in speed between 0.0 and 1.0 at cruise is not that much.  There is not much speed available to play with.  In cruise config a 747 might have a minimum safe cruise speed of 250knots IAS but at 38,000ft their "Mach limit of 0.86" is only something like 290kts IAS (excuse me not looking it up).
bd139:

--- Quote from: thinkfat on April 29, 2020, 07:45:11 am ---
--- Quote from: bd139 on April 29, 2020, 07:25:01 am ---The issue is going to be when the death count flat lines. I’m not sure there is enough data yet to determine causality between that and either (a) the thing has burned out and (b) lockdown actually worked.
That’s a catch-22 that our political elite has managed to talk itself into a corner on with lies and promises.

--- End quote ---

You won't know until mass testing for immune globuline reveals the true spread and whether it was enough to build any kind of herd immunity. But when I look at the current mortality figures especially for England, boy, that's not looking good. Something has started eating into the 15-64 year age bracket worse than any influenza in the past years. I hope it's the lockdown working when the curve flattens.

--- End quote ---

It's mostly because we're in a right state. Smoking, drinking, rampant obesity, poverty and 40 years of marketing sedentary activities and shite food. Nothing to do with the healthcare or the government response. I suspect austerity and crack smoking mismanagement of our two main parties over the last 40 years does have a chunk of responsibility.

And yes the testing will be interesting but AFAIK it doesn't exist with the sensitivity, reproducibility or reliability yet to be viable despite the marketing to the contrary.
tom66:

--- Quote from: EEVblog on April 28, 2020, 11:32:46 am ---It won't be <50%. Majority of people travel in family groups/couples etc. So if you have a row of 4 seats and 3 people they might leave the 4th one free etc.
--- End quote ---

Something like 80% of air fights are taken by 20% of passengers: business travelers, primarily.  This will be a huge problem for airlines, as you suggest they might offer incentives if you can book seats in a family grouping but I'd still expect 50% of the aircraft to be empty and many fewer flights.

We really don't know how long this situation could last, and I fully expect to see several major, big name airlines go bust over it.
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