dgriffith

joined 2 years ago
[–] dgriffith@aussie.zone 9 points 3 months ago

Inertia, mostly.

Of course Plex then takes advantage of that with the slow erosion of the free edition.

[–] dgriffith@aussie.zone 1 points 3 months ago* (last edited 3 months ago)

It's difficult on the back end of the charger as well.

A shopping centre or rest stop can't just spring for a few high capacity chargers for the car park. A single megawatt charger is 50 houses worth of consumption, so they now need a substation upgrade to provide what is basically a whole neighbourhood-equivalent of power.

[–] dgriffith@aussie.zone 3 points 3 months ago (1 children)

standard practice to find these potential leaks with intensive pre-flight checks to identify and solve these issues before they escalate into a catastrophe.

Except these particular leaks are due to vibration modes (on the newly designed vacuum jacketed fuel lines) that seem to be only present at high g's towards the end of the burn.

After the first ship to use these new lines blew up, SpaceX made some changes and conducted a minute-long test firing on the ground of the second ship. A minute of the rocket going through various thrust levels on the ground is plenty of time to pick up issues if it was going to be visible on the ground.

Presumably it looked ok, so they launched it, and the second one blew up. They probably added more sensors on those lines, because they seem to be pretty sure that vibration modes are the issue on those lines now.

Yes, you could model this, and no doubt they did to some extent, but nothing beats testing in real life unfortunately.

[–] dgriffith@aussie.zone 6 points 3 months ago

Well, I did delete a company-mandated image from the bottom of my signature after I realised that it made even just a one-line "Thanks" email balloon out to 800kb.

[–] dgriffith@aussie.zone 17 points 3 months ago

You've got it all wrong, in traditional computer terminology the "hard drive" is the box that sits under the desk that collects cat fluff and cigarette tar.

/s .....?

[–] dgriffith@aussie.zone 3 points 3 months ago (1 children)

There is an empirical way of doing it - best one I've seen online so far is this:

AN186 - Brushless DC (BLDC) Motor Connections

[–] dgriffith@aussie.zone 11 points 3 months ago

I don't understand it. If I was a politician right now, I would not, under any circumstances, hitch my political wagon to the shitshow that is going on in the US. But Dutton and that "Trumpet of Patriots" crowd - bless their 1950's White Australia hearts - are all for it.

Labor would be wise to stall the election for a month or two, just to let things unfold a bit more over there.

[–] dgriffith@aussie.zone 11 points 3 months ago

It doesn't have to be "buy local", per se, it just has to be "buy non-US". But there are few tangible things I actually buy from the US. I don't mind stuff from the EU, it's a little pricey due to our exchange rate, but for the things I buy it's generally OK.

There are heaps of services that are bought from the US though - just about every streaming service, Google/Apple, Starlink, and so on. Those can fuck right off , if possible. Sometimes that's not practical (eg google/apple's ecosystem), but at least have a look for alternatives.

[–] dgriffith@aussie.zone 2 points 3 months ago* (last edited 3 months ago)

They aim to actively deorbit starlink sats.

(Edit: they keep a small amount of propellant in reserve for the initial deorbit burn, and then position the solar array to give maximum drag which hastens things considerably)

As far as I know, apart from the first few batches, the "production run" of sats has a pretty low failure rate and are proactively sent to their demise.

[–] dgriffith@aussie.zone 4 points 3 months ago

Older engines had them in their timing gears - they were in 6 cylinder Holdens, for example.

They give an amount of cushioning/vibration dampening that you can't get with steel gear sets.

[–] dgriffith@aussie.zone 12 points 4 months ago* (last edited 4 months ago) (2 children)

Eight years ago every single booster was lost on every single launch, and now it's, "Oh no, one caught fire!

On the ground,

after an on-target landing,

after a successful payload delivery to orbit,

after four previous launches and successful recoveries of the same booster!

RELIABILITY CONCERNS!"

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