https://newatlas.com/drones/h3-hydrogen-propulsion/H3 debuts all-in-one hydrogen powertrain pods for long-range flight
By Loz Blain
December 14, 2022
Science news of the day thread.
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Re: Science news of the day thread.
The dark horse gallops forward
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Re: Science news of the day thread.
You can see the problems that have to be resolved expressed in the design: about 1.66 more volume has to be given over to the heavier liquid H fuel than for kerosene - longer wings increase storage and reduce induced drag but also increase weight, which means you need more lift, which means bigger wings or larger/more turbines, which means more weight, etc etc. For planes of equivalent weights you have to give over about 2/3 of internal volume for H for an equivalent range, which means reducing passenger/hold volume, which increases costs. This is without talking about the problems of liquid H production and infrastructure.
The hard limits of physics are diffuclt to surmount by efficiencies in engine and material design alone, and so we need a deep thunk about the sector as a whole if we're really serious about reducing the massive contribution air transport makes to global heating.
The engineering is very cool though.
The hard limits of physics are diffuclt to surmount by efficiencies in engine and material design alone, and so we need a deep thunk about the sector as a whole if we're really serious about reducing the massive contribution air transport makes to global heating.
The engineering is very cool though.
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Clinton Huxley » 21 Jun 2012 » 14:10:36 GMT
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"It isn't necessary to imagine the world ending in fire or ice.
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"This is how humanity ends; bickering over the irrelevant."
Clinton Huxley » 21 Jun 2012 » 14:10:36 GMT
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Re: Science news of the day thread.
Massive ??? Hyperbole doesn't help.
A full 787 produces less CO2 per passenger mile than a fully occupied Prius.
vsThe global aviation industry produces around 2.1% of all human-induced carbon dioxide (CO2) emissions. Aviation is responsible for 12% of CO2 emissions from all transports sources, compared to 74% from road transport.
Let's keep some perspective.How Much Do Our Wardrobes Cost to the Environment? https://www.worldbank.org › feature › 2019/09/23 › co...
23 Sept 2019 — The fashion industry is responsible for 10 % of annual global carbon emissions, more than all international flights and maritime shipping
A full 787 produces less CO2 per passenger mile than a fully occupied Prius.
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Re: Science news of the day thread.
Bite me. Then look at particulates and aerosols. We need to rapidly implement solutions with the options we have available right now. Promises of future tech that will allow everything to be basically the same as it is today, just cleaner, are greenwashed fantasy and corporate propaganda. I'm neither a pessimist, nor a Luddite. I'm just someone who understands that we need to implement real, workable solutions today so we can actually develop that kind of cool stuff tomorrow. The age of transportation as we've understood it for the last 100 years is over.
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"It isn't necessary to imagine the world ending in fire or ice.
There are two other possibilities: one is paperwork, and the other is nostalgia."
Frank Zappa
"This is how humanity ends; bickering over the irrelevant."
Clinton Huxley » 21 Jun 2012 » 14:10:36 GMT
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"It isn't necessary to imagine the world ending in fire or ice.
There are two other possibilities: one is paperwork, and the other is nostalgia."
Frank Zappa
"This is how humanity ends; bickering over the irrelevant."
Clinton Huxley » 21 Jun 2012 » 14:10:36 GMT
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Re: Science news of the day thread.
So what are your "real workable solutions"?
Still eating meat?
New Zealand just commited to 25 electric regional aircraft ....seems that's a solution.
Still eating meat?
New Zealand just commited to 25 electric regional aircraft ....seems that's a solution.
https://www.stuff.co.nz/travel/news/300 ... ion-planesAir New Zealand has revealed what the future of flying could look like around the regions, unveiling four different zero-emissions planes it is looking to buy.
The national carrier wants its first zero-emission flight to take off in 2026 and has narrowed down a list of finalists – sealing an agreement with each company.
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Re: Science news of the day thread.
Lol. Liquid H/Electric air travel is not a solution to climate change. I can no more solve climate change than Lockhead Martin or Boeing, but adopting a similar approach to fossil fuel companies as we did to tobacco firms 20 years ago would be a start. On the substantive issues I'll simply direct you to the IPCC 2022 mitigation report for a full, data-driven explanation of the problem, and to the UNFCCC for an appraisal of the kind of steps and measures governments need to take to mitigate and adapt to global heating, and ultimately to reduce average global temperatures. Both are easily searchable.macdoc wrote:So what are your "real workable solutions"?
Still eating meat?
Individualising the issue doesn't help either, but for your information I've been a vegetarian for 40 years and a vegan for the last 2 years.
That's a positive move, but it has to be seen within the context of NZ excluding their agricultural sector from their carbon assessment and NDCs under the Paris Agreement.macdoc wrote: New Zealand just commited to 25 electric regional aircraft ....seems that's a solution.
https://www.stuff.co.nz/travel/news/300 ... ion-planesAir New Zealand has revealed what the future of flying could look like around the regions, unveiling four different zero-emissions planes it is looking to buy.
The national carrier wants its first zero-emission flight to take off in 2026 and has narrowed down a list of finalists – sealing an agreement with each company.
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"It isn't necessary to imagine the world ending in fire or ice.
There are two other possibilities: one is paperwork, and the other is nostalgia."
Frank Zappa
"This is how humanity ends; bickering over the irrelevant."
Clinton Huxley » 21 Jun 2012 » 14:10:36 GMT
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Details on how to do that can be found here.
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"It isn't necessary to imagine the world ending in fire or ice.
There are two other possibilities: one is paperwork, and the other is nostalgia."
Frank Zappa
"This is how humanity ends; bickering over the irrelevant."
Clinton Huxley » 21 Jun 2012 » 14:10:36 GMT
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Re: Science news of the day thread.
Biodiesel is a better fuel.Brian Peacock wrote: ↑Sun Dec 18, 2022 8:33 amYou can see the problems that have to be resolved expressed in the design: about 1.66 more volume has to be given over to the heavier liquid H fuel than for kerosene - longer wings increase storage and reduce induced drag but also increase weight, which means you need more lift, which means bigger wings or larger/more turbines, which means more weight, etc etc. For planes of equivalent weights you have to give over about 2/3 of internal volume for H for an equivalent range, which means reducing passenger/hold volume, which increases costs. This is without talking about the problems of liquid H production and infrastructure.
The hard limits of physics are diffuclt to surmount by efficiencies in engine and material design alone, and so we need a deep thunk about the sector as a whole if we're really serious about reducing the massive contribution air transport makes to global heating.
The engineering is very cool though.
I call bullshit - Alfred E Einstein
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Re: Science news of the day thread.
Perhaps, but only effective if other carbon reduction measure are in place.
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"It isn't necessary to imagine the world ending in fire or ice.
There are two other possibilities: one is paperwork, and the other is nostalgia."
Frank Zappa
"This is how humanity ends; bickering over the irrelevant."
Clinton Huxley » 21 Jun 2012 » 14:10:36 GMT
.
Details on how to do that can be found here.
.
"It isn't necessary to imagine the world ending in fire or ice.
There are two other possibilities: one is paperwork, and the other is nostalgia."
Frank Zappa
"This is how humanity ends; bickering over the irrelevant."
Clinton Huxley » 21 Jun 2012 » 14:10:36 GMT
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Re: Science news of the day thread.
I call bullshit - Alfred E Einstein
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Re: Science news of the day thread.
it ain't... not from a carbon print pov, of course, it's renewable, but it still pours tons of shit in the environment.rainbow wrote: ↑Sun Dec 18, 2022 6:52 pmBiodiesel is a better fuel.Brian Peacock wrote: ↑Sun Dec 18, 2022 8:33 amYou can see the problems that have to be resolved expressed in the design: about 1.66 more volume has to be given over to the heavier liquid H fuel than for kerosene - longer wings increase storage and reduce induced drag but also increase weight, which means you need more lift, which means bigger wings or larger/more turbines, which means more weight, etc etc. For planes of equivalent weights you have to give over about 2/3 of internal volume for H for an equivalent range, which means reducing passenger/hold volume, which increases costs. This is without talking about the problems of liquid H production and infrastructure.
The hard limits of physics are diffuclt to surmount by efficiencies in engine and material design alone, and so we need a deep thunk about the sector as a whole if we're really serious about reducing the massive contribution air transport makes to global heating.
The engineering is very cool though.
Embrace the Darkness, it needs a hug
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PC stands for "Patronizing Cocksucker" Randy Ping
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Re: Science news of the day thread.
AMD from gold mines... what do they say about the mercury?
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Re: Science news of the day thread.
https://www.bbc.co.uk/news/science-environment-63603489
Canada's polar-bear capital Churchill warms too fast for bears
By Victoria Gill
Science correspondent, BBC News
"The bears know the ice will be back soon - they're waiting," says Alysa McCall, from Polar Bears International (PBI)
(continued
Canada's polar-bear capital Churchill warms too fast for bears
By Victoria Gill
Science correspondent, BBC News
"The bears know the ice will be back soon - they're waiting," says Alysa McCall, from Polar Bears International (PBI)
(continued
WeAreAStableCountry
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Re: Science news of the day thread.
Mercury is a big problem, but can also be taken up with ion exchangers.
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Re: Science news of the day thread.
OK, that's good news then
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Re: Science news of the day thread.
Every molecule of CO2 given up by burning biodiesel comes from CO2 via photosynthesisSvartalf wrote: ↑Sun Dec 18, 2022 7:02 pmit ain't... not from a carbon print pov, of course, it's renewable, but it still pours tons of shit in the environment.rainbow wrote: ↑Sun Dec 18, 2022 6:52 pmBiodiesel is a better fuel.Brian Peacock wrote: ↑Sun Dec 18, 2022 8:33 amYou can see the problems that have to be resolved expressed in the design: about 1.66 more volume has to be given over to the heavier liquid H fuel than for kerosene - longer wings increase storage and reduce induced drag but also increase weight, which means you need more lift, which means bigger wings or larger/more turbines, which means more weight, etc etc. For planes of equivalent weights you have to give over about 2/3 of internal volume for H for an equivalent range, which means reducing passenger/hold volume, which increases costs. This is without talking about the problems of liquid H production and infrastructure.
The hard limits of physics are diffuclt to surmount by efficiencies in engine and material design alone, and so we need a deep thunk about the sector as a whole if we're really serious about reducing the massive contribution air transport makes to global heating.
The engineering is very cool though.
I call bullshit - Alfred E Einstein
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