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ESA builds air-breathing engine that works in space

Anonymous Coward

Typo

"The engine has no moving parts and that’s needed to power the engine is electricity."

should be:

"The engine has no moving parts and all that is needed to power the engine is electricity."

Seriously, who proof reads at Reg Vulture Relocated Rotting Corpse Central?

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Re: Typo

I wouldn't bother applying for the job as you missed the "Tips and corrections" link that's at the bottom of every story.

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Anonymous Coward

Re: Typo

The "that's" is more probably a single letter typo of "what's".

"The engine has no moving parts and what's needed to power the engine is electricity."

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Anonymous Coward

Re: Typo

The sort of complaints we'd have to get used to if Jacob Rees-Mogg was to become Prime Minister (please no), where tedious (Mogg like-minded) people get so wrapped up in minute detail that nothing ever gets done.

It's a great article, see it for what it is.

(You could be having a field day over at the Daily Mail. Maybe, head over there, they describe Scottish people as "English roses")

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Re: Typo

If the coward used the corrections link, we wouldn't, necessarily, know about it and be able to add our invaluable input!

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Re: Typo

The sort of complaints we'd have to get used to if Jacob Rees-Mogg was to become Prime Minister

It's just as well it's not Boris Johnson, or we'd have to have the typos corrected in Latin.

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Elon Musk's plans for a low orbit, low latency network of satellites.

Elon Musk's plans for a low orbit, low latency cluster/network of satellites providing Internet capability, is looking rather more feasible and manageable. This would give those satellites a much longer working life.

Maybe he knew more than he was letting on when he announced it.

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Re: Typo

Tis better than what they used to call them, forsooth - to whit "moving targets"

That said the next person who complains on a forum about their cars expensive break job, I will happily chase down with a Ricin laced crossbow.

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Re: Typo

@Jemma

cars expensive break job

Hey, if you break your Ferrari by wrapping it round a tree, it is a VERY expensive job!

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Anonymous Coward

Re: Typo

And if Jeremy Corbyn was Prime Minister then you could denounce people who make complaints you don't like and have them sent to the gulag to be worked to death.

But I prefer to keep childish and irrelevant political commentary in the Guardian where it belongs.

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Anonymous Coward

Re: Typo

It's just as well it's not Boris Johnson, or we'd have to have the typos corrected in Latin.

Mutatis mutandis

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Re: Elon Musk's plans for a low orbit, low latency network of satellites.

A global internet free of ICAAN, censorship or the copytheft monopolists?

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Anonymous Coward

Re: Typo

You want to lace up a crossbow? That's some weird Tory MP level stuff right there....

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Re: Typo

Oi! I rather like the Grauniad.

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Coat

Re: Typo

Bussard central, shurely?

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@A Non e-mouse

The email link for corrections? If you use webmail or don't have an email client set up for some other reason it is completely useless. It's long past time El Reg had a convenient web form for corrections rather than relying on email.

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Re: @A Non e-mouse

Or you could try setting up your machine properly to handle a very basic href standard.

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Anonymous Coward

Re: Typo

> you missed the "Tips and corrections" link

You mean the mailto: link? If there was a proper webform that was quick and convenient, I'd happily use it. Having to disclose my email address or go through the faff of logging into a throwaway one to correct someone's spelling mistakes? I don't think so.

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Anonymous Coward

Re: Typo

> It's a great article, see it for what it is.

I beg to differ. The subject of the article may be great. The article itself is just a quick (and typoed) rewording of the ESA's own press release. This article's only plus is that it provides a link to that.

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Re: Typo

Sending email is DIFFICULT??? Methinks ElReg might be too advanced for you. Perhaps try another redtop?

And BTW, Mr/s AC, ElReg already has your email address. Remember, that one you used to sign up with? The one that all your posts are linked to? Hint: eyeball your posting history. Not all that anonymous, are you?

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Re: Typo

As long as it's just the crossbow, and you're the one handling it. The bolts, on the other hand ...

The gripping hand wonders if lacing a crossbow is anything like lacing a wheel?

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Re: Elon Musk's plans for a low orbit, low latency network of satellites.

He's the third organisation with the idea. Work started already.

The problem is that while it solves the latency issue of Ka-Sat (with its 82 spots approx), it doesn't give very good capacity.

Good coverage doesn't mean good speed.

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Re: Grauniad

You mean the Gridion. The Truth will make you fret.

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Re:don't have an email client set up for some other reason it is completely useless

I had real email on my phone in 2001. I don't bother now as I don't go out.

Sure 1/2 the people reading are probably in offices during day?

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Re: disclose my email address

Didn't you do that ANYWAY, to be a commentard?

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Anonymous Coward

Re: Typo

> Mr/s AC, ElReg already has your email address.

The throwaway email address that I used to sign up here like twenty years ago does not even point to an existing domain. I am not sure if it ever did.

Quite apart from the loss of privacy, I would hate to deal with all the spam that results when people give their actual email address(es) to world + dog.

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Re: Typo

So you admit you falsified your ElReg registration info? Are you certain you want to do that? After all, it's been your handle "for like 20 years" (yeah, sure, right). I'd hate to see you lose it.

You also admit that you use email addresses that are not yours? There's a word for that.

How on earth do you equate using a proper email address to register here with "giving your email addres(es) to world+dog"? Do you really think ElReg is likely to sell your address to spammers? Or are you so paranoid that not even your DearOldMum knows your email address? Because I guarantee that ElReg is a hell of a lot less likely to be compromised than she is. Kinda makes email pretty useless for you, no? So you may as well use the real thing, useless as it is ...

Your privacy in this context is totally meaningless outside your personal paranoia.

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Re: Typo

You could send an e-mail using a completely fabricated from: address if you want, all you need is an SMTP server.

Alternatively publicly deride the author for making a simple error.

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Re: Typo

The tips and corrections link is a mailto: link, which isn't much help when you don't have an email client installed.

And I'll admit to being too lazy to go through the rigmarole of logging into webmail when I can just post it as a comment.

The reg would be better off making it a form that, it they really want an email, sends an email.

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Coat

Re: Typo

I will happily chase down with a Ricin laced crossbow

It's probably better to lace the bolts with Ricin..

OK, OK, I'm just leaving. Mine's the coat with the built-in leather plates and the chain coif attached.

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Re: Typo

Mutatis mutandis

BoJo is a mutated mustard?

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Re: Typo

That's some weird Tory MP level stuff right there.

Oh I dunno - the old time Liberal party was partial to a bit of that too.

Err.. allegedly.

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Re: @A Non e-mouse

The email link for corrections? If you use webmail or don't have an email client set up for some other reason it is completely useless

If only computer came with the ability to copy a bit of text from one browser window to another eh? That would mean we could do a whole lot more!

There - can you see my level of sympathy? It's not only very, very small, it's also very, very, very far away...

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Re: Typo

webform that was quick and convenient, I'd happily use it. Having to disclose my email address

.. which you must have done in order to get an El Reg login..

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Re: Typo

Do you really think ElReg is likely to sell your address to spammers

.. which they don't. Or, at least, I've never had any spam addressed to the variant I use for El Reg..

Your privacy in this context is totally meaningless outside your personal paranoia.

[Potstirring mode=On]

Just because you are paranoid doesn't mean they are not out to get you..

[/PSM=Off]

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Re: Typo

The reg would be better off making it a form that

.. can be abused by every spam engine out there?

I have one website that has a feedback form. Despite the fact that it goes no-where else other than webmaster@, it gets tons of autofilled spam.

It also regularly gets a whole SMTP conversation (albeit one-sided) where scum^W spammers are trying to use it as if it was an open relay..

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Re: Typo

"I have one website that has a feedback form. Despite the fact that it goes no-where else other than webmaster@, it gets tons of autofilled spam."

Your doing it wrong then!

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Re: Typo

Blaming the victim, MrKrotos?

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GOCE

>ESA’s GOCE gravity-mapping mission, but it carried 40kg of Xenon gas to provide it with thrust so it could change altitude when its orbit became low.

Actually it ran the ion thruster all the time, to keep it orbiting smoothly, despite the air resistance.

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Boffin

The concept’s been used before by..GOCE..but it carried 40kg of Xenon gas

That's called an ion thruster. Lots of those have been used.

This uses the ambient "atmosphere" (although it's roughly < 1/32 Sea Level pressure).

This is (loosely) an "Ion ramjet" rather than an "Ion rocket"

So yes that is pretty impressive as it's one of the first (the first?) ever demonstrated.

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Pint

"...roughly < 1/32 Sea Level pressure...".

JS19 suggested that the environment under discussion was "...roughly < 1/32 Sea Level pressure...".

At orbital velocity, roughly 1/32 Atmosphere would cause any spacecraft to be quickly incinerated. This is one reason why there are not very many satellites orbiting at 80,000 feet above the Earth.

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Pint

Re: "...roughly < 1/32 Sea Level pressure...".

I would just say that "roughly <" was a tiny understatement.

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Unhappy

At orbital velocity, roughly 1/32 Atmosphere would cause any spacecraft

Ooops.

Well that's what happens when you use the rule of thumb of air pressure halving every 5.6Km.

In fact https://www.avs.org/AVS/files/c7/c7edaedb-95b2-438f-adfb-36de54f87b9e.pdf

Suggests its more like 72 millionths of a Psi.

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depends on how this tech scales but you could find more sats lasting longer in low orbit. More accurate GPS, sat phone prices (both handset amd air time) might drop to sane levels (imagine access outside everywhere in the world and pico cells for inside). Cube sats could be revolutionised.

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Joke

"Cube sats could be revolutionised."

Would that make them sphere sats?

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Don't be such a square, man.

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Joke

I was thinking more of how they could move from being proof of concepts and a way to get students interested in space to a workhorse platform that can do interesting or helpful stuff faster, cheaper and easier than higher orbit sats but I should have figured out el reg regulars would find a way to view it from another angle.

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@AC all I need is a lightsabre and a helmet with a broken visor.

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TRT
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Wouldn't that make them sphere sats?

Cubes vs spheres? Sounds familiar.

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Anonymous Coward

"[...] I should have figured out el reg regulars would find a way to view it from another angle."

Think of it as a game of political correctness or chess. You think twice about what you have done to see if you have left anyone room to manoeuvre**. Then you decide if you want to be amused by the exploits - or you hope someone will make a move for which you have a counter already prepared.

Lateral thinking is an ability to be prized in IT. Bangor University Electronic Engineering department ran degree applicants through a few tests - and that was a sought after trait. A question I remember was simply "what is a U2". To which there were several answers at that time.***

**correct spelling - unlike the lorry warning sign that Waitrose put outside some store delivery bays.

***battery (now D type); submarine, spy plane. The pop group didn't come along until later.

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