this post was submitted on 13 Jan 2024
180 points (96.9% liked)

science

14779 readers
40 users here now

A community to post scientific articles, news, and civil discussion.

rule #1: be kind

<--- rules currently under construction, see current pinned post.

2024-11-11

founded 1 year ago
MODERATORS
 

In launch event on Friday, agency shared plans to test over US cities to see if it’s quiet enough by engaging ‘the people below’

Nasa has unveiled a one-of-a-kind quiet supersonic aircraft as part of the US space agency’s mission to make commercial supersonic flight possible.

In a joint ceremony with Lockheed Martin Skunk Works in Palmdale, California, on Friday, Nasa revealed the X-59, an experimental aircraft that is expected to fly at 1.4 times the speed of sound – or 925mph (1,488 km/h).

The aircraft, which stands at 99.7ft (30.4 metres) long and 29.5ft wide, has a thin, tapered nose that comprises nearly a third of the aircraft’s full length – a feature designed to disperse shock waves that would typically surround supersonic aircraft and result in sonic booms.

top 50 comments
sorted by: hot top controversial new old
[–] JudahBenHur@lemm.ee 34 points 10 months ago (5 children)

pretty neat that the image of the plane for the article is shot from so close that you can only see 1/3 of it, but to be fair it does include the screens of people's phones as they take a picture of the thing. kind of like going to a concert.

[–] Nudding@lemmy.world 7 points 10 months ago (1 children)

Haha I wonder about the ungodly amount of fuel it burns.

[–] curiousPJ@lemmy.world 9 points 10 months ago* (last edited 10 months ago) (1 children)
[–] Nudding@lemmy.world 1 points 10 months ago (1 children)

Old news now. The evil in the hearts of humans will be our collective undoing.

[–] greedytacothief@lemmy.world 1 points 10 months ago

I'm not so sure it's their hearts, those are full of blood. It's more like a system that incentivises people to make immortal decisions for profit.

[–] Steve@startrek.website 5 points 10 months ago

The website blasted me in the ass with ads, while simultaneously begging for donations

[–] Marsupial@quokk.au 5 points 10 months ago (1 children)

Yeah but with the pictures on the phones, we actually end up with more picture per picture with this method.

[–] conditional_soup@lemm.ee 3 points 10 months ago

Yo dawg, I heard you like pictures

[–] XeroxCool@lemmy.world 3 points 10 months ago* (last edited 10 months ago)

It's proportions make it hard to frame it for an article headline picture. This is cropped to show a colorful array of the fun parts: cockpit, landing gear engine intake with a clear X-59. It's like trying to make a cover picture feature a pencil.

This other article uses a dramatic background to fill the space. It's from NASA though, so they're not limited to the conference. They don't have to have their own picture to say "I was there"

https://kbin.social/m/technology@lemmy.world/t/758938

[–] Landsharkgun@midwest.social 19 points 10 months ago (6 children)

Please don't. We need to be reducing air travel, not increasing it. Go invent a quiet supersonic train or something.

[–] Swedneck@discuss.tchncs.de 4 points 10 months ago

the transatlantic railway is feeling less and less like a funny absurdist joke by the hour

[–] gaael@lemmy.world 3 points 10 months ago (1 children)

That is not said often enough, thank you !

[–] soggy_kitty@sopuli.xyz -1 points 10 months ago

I'm trying to fight the downvoters, you were on -3 when I saw your comment.

load more comments (4 replies)
[–] xkforce@lemmy.world 11 points 10 months ago

Now the fuel efficiency problem needs to be reckened with. The sonic boom was the main reason why supersonic planes were shelved but poor fuel efficiency was the other 800 pound gorilla in the room.

[–] AbouBenAdhem@lemmy.world 11 points 10 months ago (7 children)

Pierce said the X-59’s job would be to “collect data from the people below, determine if that sonic thump is acceptable and then turn the data over to US and international regulatory authorities in hopes to then lift that ban”.

Why can’t commercial airlines fund the project, then? Why is NASA investing public money to deregulate private industry?

[–] GBU_28@lemm.ee 38 points 10 months ago (1 children)

Huh? NASA is providing thought leadership to expand the possibilities of human travel, but has no interest in running a commercial airline.

Many technologies you use every day started as NASA research

[–] awwwyissss@lemm.ee -3 points 10 months ago (1 children)

Why are tax dollars going to something that will only benefit a small percentage of people and will cause relatively bad environmental damage.

[–] GBU_28@lemm.ee 2 points 10 months ago (1 children)

Are you aware what NASA stands for?

I personally am happy some of my tax dollars go towards advancing science.

The reason we have issues in society...homeless people, lack of universal healthcare, etc is not because we find NASA, it's via mismanagement of the funds we have, and bad politics, etc. None of which are NASAs fault or purpose.

NASA does a huge amount of environmental research as well. But part of their team focuses on experimental flight, and this is a product of that.

[–] awwwyissss@lemm.ee 1 points 10 months ago

I'm happy to fund science too, but this isn't the time to develop even more fuel-intensive commercial travel options.

[–] DistractedDev@lemmy.world 33 points 10 months ago

The first A in NASA is aeronautics. They just do the science. I would say deregulation is a fairly strong word here. It's more like they'd be updating the laws to reflect modern tech.

[–] Artyom@lemm.ee 12 points 10 months ago (3 children)

This is literally how every expensive R&D project gets done. Private companies won't dump this kind of money into good R&D, but the government will because they don't care about ROI.

[–] You999@sh.itjust.works 2 points 10 months ago

Except this ignores the existence of bell labs, you know the private R&D lab with ten Nobel prizes and a laundry list of inventions that quite literally shaped our modern world.

load more comments (2 replies)
[–] Steve@startrek.website 9 points 10 months ago (1 children)

Deregulate is not the same as engineering a solution to solve the problem that was previously solved by regulations.

[–] PsychedSy@sh.itjust.works 2 points 10 months ago

The assumption that all regulations are good now, and in perpetuity, is the issue here. Deregulation of shite or outdated regs is a good thing ffs.

It's insane to me that the word seems so opaque to people.

[–] PsychedSy@sh.itjust.works 3 points 10 months ago

This is probably defense spending, tbh.

load more comments (2 replies)
[–] BruceTwarzen@kbin.social 11 points 10 months ago (1 children)

That's what we really need right now. Faster air travel for fewer people.

[–] LibertyLizard@slrpnk.net 5 points 10 months ago* (last edited 10 months ago)

But how else will the ultra-wealthy jet over to their summer homes in new Zealand when wet bulb temperatures exceed human survival in the Northern Hemisphere?

[–] SlopppyEngineer@lemmy.world 4 points 10 months ago

I would be disappointed if the prototype isn't nicknamed Pinocchio.

[–] blazera@kbin.social 3 points 10 months ago (1 children)

Looks to me like a climate change accelerator for rich people. Fewer people per flight, spending more fuel to go faster.

[–] 4am@lemm.ee -2 points 10 months ago (6 children)

Pleas explain why you think either of those things are true.

[–] LibertyLizard@slrpnk.net 7 points 10 months ago

Supersonic jets already exist and use dramatically more fuel to carry fewer passengers. Making them not work this way would be an amazing breakthrough that would have merited some mention in the article.

Because of the high fuel use and limited space, this technology will be only used by the ultra-wealthy and will considerably accelerate climate change. It is an absolutely disastrous use of public funds.

[–] blazera@kbin.social 6 points 10 months ago

the coefficient of drag goes up exponentially the faster you go. As for fewer people, I used my eyes to see that there's not a lot of room for passengers.

[–] Someonelol@lemmy.dbzer0.com 5 points 10 months ago

I'm no expert but I'll take a stab at it. The faster you go the more drag you get on the fuselage that would need to be compensated for with more fuel (unless some neat mechanic helps to mitigate that). Take a look at a conventional jet airplane and you'll notice it's capable of holding passengers from nose cone to tail reasonably well due to its cylindrical shape. The X-59's design has some very interesting geometric features that would give less internal volume for passengers (unless it can be modified to improve for this).

If that's not reasonable enough then just look at the kinetic energy equation, KE=1/2mv^2. Compared to a velocity of a jet airliner going at 900km/hr versus this plane's Mach 1.4 (roughly 1500 km/hr) it takes roughly 2.78 times more energy to move a vehicle at that speed (not accounting for drag, energy efficiency, etc.). Is it worth spending roughly 2.78 times more fuel to get to a place 1.67 times faster?

[–] eskimofry@lemmy.world 3 points 10 months ago

Not OP:

The more you try to fly faster through any fluid (like earth's atmosphere) the more drag you face. Hence you need a lot more energy (orders of magnitude more, possibly exponentially more). This equates to more fuel burn.

Also since you are going supersonic... you really cannot build big. Also, these things are quite expensive to build, maintain and run. Hence only the top 1% of folk could afford to fly in these things.

[–] soggy_kitty@sopuli.xyz 2 points 10 months ago

Please explain why you don't think either of those things are true.

[–] Swedneck@discuss.tchncs.de 0 points 10 months ago

well, that's 5 answers and no reply from you, i assume you're busy campaigning to ban short-haul flights?

[–] NESSI3@lemmy.sdf.org 2 points 10 months ago* (last edited 7 months ago)
[–] Anticorp@lemmy.world 2 points 10 months ago* (last edited 10 months ago)

This is pretty amazing! This thing could take people from Los Angeles to NYC in 3 hours. The science behind the noise baffling is really cool.

load more comments
view more: next ›