* Posts by James Hughes 1

2173 posts • joined 12 Jun 2009

Falcon 9 fireworks display grounds SpaceX

James Hughes 1
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Re: Debug Question ?

They figured this one out from telemetry. There was an over pressurisation event in the second stage tank, which had counter intuitive causes. They used analysis (ie timing which sensor fired when) to find out where the pressure spike started (IIRC), which indicated a strut failure around the helium tank (COPV). The strut however were rated for 3x the expected load so should not have failed, so they then tested a LOT of struts (1000+) and found a couple that broke well below the certified load. Further analysis of the bolts (I think) showed bad grain structure inside the bolts which caused the failure.

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The Raspberry Pi is succeeding in ways its makers almost imagined

James Hughes 1
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Re: Raspberry pi for a netball scoring system?

Yes, you could. But it's easier on a Pi, and there is a lot of community help. And the Pi is still only $35, so ease of development outweigh the extra cost over a PIC or Arduino.

The world is filled with overkill. 8 Core CPU's in a phone? Basic cars that can do 100mph when the speed limit is 70? 50" TV's?

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Prof Hawking cracks riddle of black holes – which may be portals to other universes

James Hughes 1
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More importantly, why would anyone downvote that post? Was it someone from a different dimension

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3D-printed robot hand grabs Dyson award for UK

James Hughes 1
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Re: Nice idea... now how about material safety?

Is your glass half empty?

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Visitors no longer welcomed to Scotland's 'Penis Island'

James Hughes 1
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I think Peneston is Brittany should get a mention. 'Cos it sounds like Penistown.

Snigger.

(Yes, it also is missing an accent)

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Antiques in spaaaaace! Retired space shuttles cannibalised for parts

James Hughes 1
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Re: Why imagine ?

Large amounts of Hadrian's wall were used to make a road in the 18th century. Imagine, a wall that latest 1500 years, knocked down to build a road.

Bummer.

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Ford's parallel PARCing: Motor giant tries to craft new tech just like Xerox

James Hughes 1
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There are many reasons why someone might be late, through circumstances out of their control, this is just another reason.

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Hurrah! Windfarms produce whopping ONE PER CENT of EU energy

James Hughes 1
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Re: Actual facts and figures

If you actually want actual facts there is a spreadsheet downloadable from the site you link to which shows the amount of wind power produced over the last year or so.There are very few period of zero (about 45 periods in 231k)

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James Hughes 1
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I'm interested to know what that mythical 'other source' is. Or why you think electric cars are impractical if battery equipped, given there are 750k or more electric cars being entirely practical out there already.

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James Hughes 1
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Re: See it

Thanks for the Gridwatch link -0 although doesn't seem to give any figures on solar which would be QI.

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Acer Revo One RL85: A pint-sized PC for the snug

James Hughes 1
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" It is even capable of running windows 8.1". Er, not really. It will run WIN10IoT, but not 8.1.

That said the Pi2 is easily capable of running Kodi, and much faster than Pi1 (which I used to run Kodi, and found it OK as well)

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Blessed are the cheesemakers, for they have defined the smidge

James Hughes 1
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Re: I'll take these with 0.3125ml of salt

I use tad all the time, as in "I'll have a tad more gin in that G&T please"

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Disaster-gawping cam drones to be blasted out of the sky in California

James Hughes 1
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Re: Just paint it black (Liar and Racist!)

Blimey, seems a bit harsh to kill someone for overturning a car, or looting (because, you know, shooting people does lead to death, regularly).

How about just arresting them?

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Apple Watch is such a flop it's the world's top-selling wearable

James Hughes 1
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Blimey. I thought it was just a joke.

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James Hughes 1
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Re: Who actually wears a watch anymore? And why?

I wear a watch. It very useful for telling the time, quickly with very little fuss (like charging). That is all.

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What goes up, Musk comedown: Falcon rocket failed to strut its stuff

James Hughes 1
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Re: Failure to test cost hundreds of millions

Everyday, millions of people get in to a car that is certified safe by various NCAP tests. The car you get in was manufactured using certified parts. The builder DID NOT test every single part before it was assembled,. They relied on the subcontractors making the part to the specification required. You put your children life in the hands of those subcontractors doing their job properly. And it works.

It's no different here, at some point you need to rely on your supplier doing what is requested of them because testing every part is financially impossible. No rocket company does it, not car company does it.

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James Hughes 1
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Re: That's what happens...

He got downvotes because his post is wrong, albeit reasoned. The part was designed to withstand 10klbs, it apparently failed at 2klbs. The part was certified by the supplier to 10k. They tested a lot of struts, and a small percentage failed. The same design/manufacture strut has been used on all previous F9 flights.

So although you could argue they should test each part before use, they were using CERTIFIED parts (and you cannot test every part of the rocket, it's just not feasible)

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You Musk be joking: Tesla's zero to 60MPH in 2.8 SECONDS is literally 'ludicrous'

James Hughes 1
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Re: Gotta sell some more cars

1) it's the first failure of an F9, and 2) its not really a disaster. So not sure what you mean by 'latest disaster'.

And you also seem to have fallen for the government grants strawman as well. And that investor thing.

And since when have the 0-60 figures or ideal conditions thing not applied to every single car performance ever? What about the Ferrari which could only do two full speed accelerations before you needed a new clutch, or the 15 minute drive time of a Veyron at full speed. Or how about the wife's car, which gets nowhere near the claimed range or fuel economy, despite being driven sensibly all the time.

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James Hughes 1
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Re: 90kWh @ALan Edwards

"Only if you're slowing down, regen braking uses the car's momentum to use the motor as a generator. A petrol engine's management system will turn the fuel off when coasting, effectively the same thing. Once stopped (unless you have auto-start-stop on the engine) it will use some fuel idling the engine where the electric uses none."

This isn't wholly true - its NOT effectively the same thing. . Although you may have turned off the petrol, you are not reusing the energy lost through braking - it leaves as heat. A regenertive system reclaims that energy and reuses it, which is a big benefit with electric vehicles in my view.

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James Hughes 1
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Re: 90kWh

You are not meant to follow - Jeffypooh seems to have an agenda. His arguments started off well, but now he got to the 'sigh' and other insults stage, rather than continue to cogently argue his case, and that is a very visible guarantee of argument loss.

I don't have a Tesla. But I'd really like one. 300 miles (or even 200) is more than enough for me and my daily commute. I don't generally feel the need to use every ounce of power available at every opportunity (I still have a race car for that), and talk of drag racing leaves me cold (corners are where the driving skill is).

Now, off to fill up my car with petrol. I have to make a special trip as there is no station on my drive in to work (not bad for 30 miles each way).

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Why the BBC is stuffing free Micro:bit computers into schoolkids' satchels

James Hughes 1
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Alternative but similar device

https://www.kickstarter.com/projects/922345933/codebug

Waiting for mine at the moment

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Ford's 400,000-car recall could be the tip of an auto security iceberg

James Hughes 1
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Re: The more of this I read

Modern cars are much more fuel efficient, have better quality interiors and more features. They are also safer and often cheaper to maintain, as they go wrong less.

But apart from that...

(I have an 13 year old Civic on 230k miles, plus some kit cars based on Escort Mk2 parts, so not as if I have a new car, but even I can see the advantages)

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James Hughes 1
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Re: That is the least of your problems

Then you are back to what we have now - return car to dealer for fixing.

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James Hughes 1
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Re: So what happens

I believe that safety issues have to be fixed even if out of warrantee. Hence you get recalls of even quite old cars.

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Google's new view of the world takes two pics to make 'DeepStereo' 3D

James Hughes 1
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That's pretty impressive

That is all.

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The Scientific Secrets of Doctor Who

James Hughes 1
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Re: Paid by the word????

Nope, not just you - had no idea what the reviewer was one about.

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James Hughes 1
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Re: Who?

Whooaa. Not seen a Sapphire and Steel reference for a while....

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Engineers 3D-print ROBOT SEAHORSE, then SMASH it with rubber mallets

James Hughes 1
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Re: Just like a Hooder then

OOoh, good reference. Was thinking about them only this morning. The Technician..

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Goodbye Vulcan: Blighty's nuclear bomber retires for the last time

James Hughes 1
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All 3 V-bombers

Can be seen at Duxford as static displays. Saw a Vulcan do a show there in the late 70's. Turned away from crowd and let the engines rip. Quite impressive.

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Why SpaceX will sort out Sunday's snafu faster than NASA ever could

James Hughes 1
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Re: No wonder

FFS. All covered extremely well in Vance's book about Musk. Read it before commenting.

But in short - he nearly blew his entire fortune (within a couple of day of going broke) on SpaceX and Tesla.

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Giant FLYING SPACE ROCKS could KILL US ALL, warns Brian May

James Hughes 1
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Ex-Queen?

I think Mr May may have something to say about that.

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Microsoft: This Windows 10 build has 'NO significant known issues'

James Hughes 1
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No MS apologist, but...

You last line is rather disingenuous. MS said no significant KNOWN issues, whilst you wrote no significant issues.

They are very different statements.

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KRAKKOOM! SpaceX Falcon supply mission to ISS EXPLODES minutes after launch

James Hughes 1
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Re: Physics Says...

AFAICR, the LOX tanks also have the helium pressurant bottles in them, so if one of those ruptured, there could be overpressure. BUT, that would be the first thought, and not counter-intuitive as tweeted by EM.

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Tesla says Model 3 is still on schedule, despite being delayed again

James Hughes 1
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Re: Out of curiosity ...

@Jake. Terrible troll. Not up to your usual low standard even. Finding out the Earth's supply of lithium figures is, well, so easy, a child could do it.

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James Hughes 1
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Re: Annoying fan boys...

@Jeffy.

So...people are not allowed to extoll the virtues of something they cannot afford, even the financials? I could extol the virtue of a decent modern good MPG car, diesal or petrol. But I haven't got one - I've got a 10 year old petrol Civic (230k miles and counting!). The reasons I cannot afford a Tesla S, even though it might pay for itself, is the initial upfront cost. Not the cost of ownership post initial purchase.

Your point makes no sense.

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James Hughes 1
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Re: Virtually no one...

I must be one of the virtually no-one then.

Majority of driving is a 70mile round trip to work. I think a Tesla S or Model 3 would be ideal for me.

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SpaceX gets ready to crash barge-land ANOTHER rocket

James Hughes 1
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Re: fuel?

I believe the consensus is that it's a lossy system, not using RP-1, but it is not yet known whether it vents overboard, or to a low pressure catch tank.

It's not transferred back to the fuel tank as that is on the other side of the LOX tank and the pipework would be too heavy and awkward.

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James Hughes 1
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Re: fuel?

No he doesn't. The grid fins as I understand it use separate hydraulic fluid tanks and are a total loss system, in that the fluid is not recycled back in to the tank. Hence it could and did run out. They don't use fuel (aviation kerosene) as far as I know.

EDIT: I take that back. There is some evidence that it does use RP1 that drains back in to the tank. Apologies. http://space.stackexchange.com/questions/7771/why-does-the-falcon-9-consume-hydraulic-fluid

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This whopping 16-bit computer processor is being built by hand, transistor by transistor

James Hughes 1
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Re: I must be the only software guy here

I'm also a software guy. I think this is an awesome project!

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Cupertino GIVES IN to Taylor Swift, will pay Apple Music royalties

James Hughes 1
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Re: Still won't persuade me

The 90's called, they want their AC back.

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At last, switching between rubbish broadband providers now easier

James Hughes 1
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Just switched from EE to BT

Simply for cost reasons.

Went through very easily, EE supplied MAC code with little effort, BT took MAC code and provided new router which works better than the old one (must be 6-7 years old). BT switched over seamlessly, didn't even notice when it happened.

We have yet to see if service is better or worse. So far seems pretty much the same.

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US Air Force drone pilots in mass burn out, robo-flights canceled

James Hughes 1
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Already happens.

On exercise some years ago, the British army chaps were about to attach the American base, when the food trucks turned up. Set out tables, got food ready. All the American soldiers decamped from position and went to eat. Note, ALL the American soldiers.

Nothing like a paltry exercise was going to get in the way of their grub time.

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Only good thing about Twitter CEO storm: 140 character limit gone

James Hughes 1
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Re: ...and has 3,900 employees...

That was the figure I gawped at. How can it need 3900 people to run Twitter?

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Teaching kids to code is self-defence, not a vocational skill

James Hughes 1
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Re: @ Tachikoma

I absolutely disagree that Scratch is a waste of time. It's a fantastic introduction to almost all the basic concepts used in computing. And as an added bonus there is the instant gratification of seeing stuff working, which you don't generally get with textual languages, even python.

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Facebook decides space isn't its final frontier after all

James Hughes 1
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Re: I'm wondering

This is why SpaceX are planning a constellation. You just need a land station, then feed out the data locally from there - no need for the fibre. They are not going for the sat phone type market, but the backbone, but in SPPPAAAAAACCCCEEE.

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Elon Musk: How the Billionaire CEO of SpaceX and Tesla is Shaping our Future

James Hughes 1
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In my stack...

Had it on preorder, but now have a stack of books with others to get through first. Might change the order....

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James Hughes 1
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Re: mining asteroids

Robinette Broadhead?

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Caterham 270S: The automotive equivalent of crack

James Hughes 1
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Re: Your phone works on electricity

It's the difference between large scale manufacture and small scale.

On the other hand, there are cheaper ways to make a 7 like car.

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James Hughes 1
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Re: Now that ElReg is...

Takes about two weeks to make one from kit. Friend did exactly that. Others can take much longer. Took me some months to make a Westfield 25 years ago, but that included sourcing a lot of parts myself. Caterham kits have most of the bits you need already.

My Locost still isn't finished and I started it over ten years ago. But then I did make the chassis and build the engine from bits. (ex. FFord engine, +60 overbore, twin dellorto 40's, stage 3 head, high lift cam etc).

Building these things is fun, unless you have children. When you never have time.

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Gamers! Yes, gamers – they'll rescue our streaming Fire TV box, hopes Amazon

James Hughes 1
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Fire stick

Accidentally got Amazon Prime the other day by pressing the wrong button when buying something. But tried it out on the PS3, and really quite like it. So bought a Fire Stick as Ps3 needs to be repaired (coincidence?), and, also, really like that too (but did work on the chip in it so biased). Been struggling getting the other half to stop watching stuff. Not tried other media streaming services though, so comparison not available!

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