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  #81  
Old Posted Jan 31, 2022, 5:05 PM
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NASA is designing a quieter supersonic plane, the X-59

https://www.digitaltrends.com/news/n...et-supersonic/

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- NASA is working on a new design of a supersonic plane which, instead of causing a sonic boom, causes a quieter sonic “thump.” The hope is that if this technology can be developed, it could enable faster flights without disturbing people living below the flight paths.

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  #82  
Old Posted Apr 21, 2022, 7:20 PM
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Ultra-light liquid hydrogen tanks promise to make jet fuel obsolete

https://newatlas.com/aircraft/hypoin...hydrogen-tank/

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- A revolutionary cryogenic tank design promises to radically boost the range of hydrogen-powered aircraft – to the point where clean, fuel-cell airliners could fly up to four times farther than comparable planes running on today's dirty jet fuel. Weight is the enemy of all things aerospace – indeed, hydrogen's superior energy storage per weight is what makes it such an attractive alternative to lithium batteries in the aviation world. We've written before about HyPoint's turbo air-cooled fuel cell technology, but its key differentiator in the aviation market is its enormous power density compared with traditional fuel cells. For its high power output, it's extremely lightweight.

- Now, it seems HyPoint has found a similarly-minded partner that's making similar claims on the fuel storage side. Tennessee company Gloyer-Taylor Laboratories (GTL) has been working for many years now on developing ultra-lightweight cryogenic tanks made from graphite fiber composites, among other materials. GTL claims it's built and tested several cryogenic tanks demonstrating an enormous 75 percent mass reduction as compared with "state-of-the-art aerospace cryotanks (metal or composite)." The company says they've tested leak-tight, even through several cryo-thermal pressure cycles, and that these tanks are at a Technology Readiness Level (TRL) of 6+, where TRL 6 represents a technology that's been verified at a beta prototype level in an operational environment.

- HyPoint says it will enable clean aircraft to fly four times as far as a comparable aircraft running on jet fuel, while cutting operating costs by an estimated 50 percent on a dollar-per-passenger-mile basis – and completely eliminating carbon emissions. HyPoint gives the example of a typical De Havilland Canada Dash-8 Q300, which flies 50-56 passengers about 1,558 km (968 miles) on jet fuel. Retrofitted with a fuel cell powertrain and a GTL composite tank, the same plane could fly up to 4,488 km (2,789 miles). "That's the difference between this plane going from New York to Chicago with high carbon emissions versus New York to San Francisco with zero carbon emissions," said HyPoint co-founder Sergei Shubenkov in a press release.

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  #83  
Old Posted Apr 22, 2022, 3:35 PM
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The next big shift in tech would be electric planes. First smaller versions and then bigger airliners.
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  #84  
Old Posted Mar 29, 2023, 3:35 PM
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This Swiss hypersonic hydrogen-powered jet will cut flights from Europe to Australia to 4 hours

https://www.euronews.com/next/2023/0...drogen-powered

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- A Swiss start-up is looking to cut that journey time down to just over four hours - with a hypersonic, hydrogen-powered passenger jet. Destinus has been testing its prototype aircraft for the past couple of years, announcing successful test flights of its second prototype. --- Hydrogen power is the subject of a lot of research and development, with proponents pointing to its green credentials, the main byproducts of hydrogen combustion being heat and water.

- Swiss start-up Destinus claims its technology will make a flight from Frankfurt to Sydney last just 4 hours 15 minutes as opposed to 20 hours, while a flight from Frankfurt to Shanghai would take 2 hours 45 minutes, eight hours shorter than that journey currently takes. --- The project is part of Spain’s push to be at the forefront of developing and producing hydrogen-based mobility in a number of sectors.

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  #85  
Old Posted May 9, 2023, 2:56 AM
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Hydrogen is the only viable option for decarbonizing our airline industry.

Even though battery technology is developing at a dizzying rate we are MANY decades away from making it practical for airplanes. It not just the huge size and weight of the batteries but also the recharging time. The more routes a plane can do in a day, the more profitable it is and the recharge times for such monstrous battery system would greatly plunge the amount of time airplanes can be flying. Added the time issue is also the fact they they would have to have monumental electrical infrastructure to pull it off.

Hydrogen is the only practical energy source for planes and freight trains, cargo ships, ferries/cruise ships, mining, and agricultural in large settings.
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  #86  
Old Posted Aug 21, 2023, 8:01 PM
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This New Blended-Wing Jet Concept Burns 50% Less Fuel, and It Could Hit the Skies by 2027

The U.S. Air Force just announced a $235 million grant to fund JetZero's full-scale, flying prototype.



JetZero announced it has received a $235 million grant from the U.S. Air Force to build a full-scale demonstrator of its blended wing-body aircraft. The X-BWB-1 could take its first flight in 2027. The California startup and Department of Defense’s Innovation Unit held a joint press conference last week.

A blended-wing jet has no definite fuselage, instead blending the wing and fuselage into one construction to reduce fuel consumption and extend its range. “It offers 50 percent lower fuel burn using today’s engines and the airframe efficiency needed to support a transition to zero carbon emissions propulsion in the future,” said CEO Tom O’Leary in a statement. “No other proposed aircraft comes close in terms of efficiency.”

Several top Air Force officials made the announcement with O’Leary. “We are in a race for a technological superiority with what we call a pacing challenge, a formidable opponent,” said Air Force Secretary Frank Kendall, referring to China.

“All of you have recognized that we have entered a new era of great power competition in which China has come to be known as our pacing challenge, but honestly, I ain’t having it,” added assistant secretary Ravi I Chaudhary, whose department is overseeing the new aircraft. “Today, we are going to set the pace by doing what we have always done. Design, build, and fly with blended wing technology.”



The X-BWB-1 would provide logistical support for the Air Force’s “Agile Combat Employment,” a strategy that would allow the U.S. military to base its ships and planes at scattered, remote locations across the Pacific in an effort to avoid China’s long-range weapons. “Operational energy will be the margin of victory in a near peer conflict in the Indo-Pacific,” said Chaudhary, referring to the blended-wing technology’s lower fuel burn. The X-BWB-1 also has a longer range, with shorter takeoff and landing capabilities.

JetZero is collaborating with Northrop Grumman and Scaled Composites to build and test the demonstrator. The company has selected Pratt & Whitney to use its GTF engines, which will make the blended-wing aircraft easier to integrate into commercial fleets. Cirium, an aviation analytics firm, estimates that air traffic will grow at a projected rate of 3.6 percent annually. The global airline fleet is projected to almost double to 47,700 aircraft by 2041, making decarbonization more challenging.

JetZero’s Jetliner version will be designed for the commercial market, creating a niche between single-aisle jets and wide-bodied aircraft. It will be able to fit into existing airport infrastructures. “Our new airframe meets both the climate challenge and the demands of an underserved mid-market segment,” said O’Leary recently. The Jetliner, he added, will also be ready to run with zero-emissions propulsion like hydrogen fuel cells when that technology becomes available.

https://robbreport.com/motors/aviati...ne-1234884595/
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  #87  
Old Posted Aug 21, 2023, 8:59 PM
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A high-lift blended wing body airliner would use half as much fuel as today's airliners for the same payload, says JetZero.


JetZero has put the Z-5 forward for a US Air Force in-air refuelling development program that may make a sizeable contribution to development funding.


Smaller, lighter and much more efficient for a given payload than the Boeing 767 designs it aims to replace.


While its wingspan would be larger than a 767, JetZero says the A-5 will be capable of operating at any airport that can handle an A330.


As a next generation air tanker, it could carry twice as much fuel as the outgoing Boeing design.


Much ligher, with higher lift and lower drag, the blended wing desgin also places its (smaller) engines on top, significantly reducing noise both in the cabin and on the ground below.


A much broader fuselage, with no tail required.


The additional cabin space would be perfect for lightweight, but large-volume hydrogen fuel tanks in a zero-emissions scenario.


Huge, broad cabin appears to have panoramic windows and skylights in this render.
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  #88  
Old Posted Aug 22, 2023, 1:51 PM
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^ Setting aside the absence of fuselage ribs along the preposterously long continuous monolithic linear windows (have fun with pressurization), the fundamental issue with very wide body aircraft is emergency evacuation. All airliners must demonstrate that they can evacuate all passengers in under 90 seconds with half the emergency exit doors disabled. That will be challenging with an extremely wide body and proportionately minimal amount of cabin space being located on the exterior.
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  #89  
Old Posted Aug 22, 2023, 2:59 PM
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Big ol' jet airliner
Don't carry me too far away.
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  #90  
Old Posted Aug 22, 2023, 6:39 PM
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Wide also sucks for air sickness. Those giant lounges in the wings that blended wing designs show off would be full of vom.


Just put some weed in the cabin air and everyone is happy.
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  #91  
Old Posted Aug 22, 2023, 6:46 PM
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Quote:
Originally Posted by SnowFire View Post
Wide also sucks for air sickness. Those giant lounges in the wings that blended wing designs show off would be full of vom.


Just put some weed in the cabin air and everyone is happy.

da, full of vom.

yaas.

yaas.

full of vom.

ok, russian trollbotski.
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  #92  
Old Posted Aug 22, 2023, 7:30 PM
SnowFire SnowFire is offline
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uh what? you want to be in the center line of an aircraft, in every axis.
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  #93  
Old Posted Aug 22, 2023, 7:51 PM
mrnyc mrnyc is offline
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Originally Posted by SnowFire View Post
uh what? you want to be in the center line of an aircraft, in every axis.
ok, sorry.
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