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_djo_

4,696 karma · joined September 15, 2010

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_djo_··on Boeing overcharged the U.S. Air Force 8,000% above market for soap dispensers
Sure, and there are useful points in the rest of this conversation about whether you need something that special for a soap dispenser and what might be driving up costs, and whether a commercial off the shelf alternative really was an option.

I wasn't trying to cover all that, I was just pointing out that MIL-SPEC is a very wide category and therefore effectively meaningless unless you're pointing out what type of application it is.

_djo_··on Boeing overcharged the U.S. Air Force 8,000% above market for soap dispensers
There are watchdog groups. The DoD Inspector General mentioned in this story is one of them, but the main one in government is the Government Accountability Office (https://www.gao.gov/). Famously, the GAO saves the federal government between $70 and $200 a year for each dollar spent on its budget.

There are also various levels of auditors within the organisation, some of whose reports are used as inputs for the IG and GAO.

_djo_··on Boeing overcharged the U.S. Air Force 8,000% above market for soap dispensers
MIL-SPEC is a very broad category. It just means it conforms to a military specification, which can be very simple and easy to meet in some cases. But when the MIL-SEC refers to safety-critical and flight-critical specifications it's a whole other story, and does become an extremely costly and difficult to meet set of standards for good reason.

Compare the cost of a MIL-SPEC ThinkPad with that of an actual flight control computer designed to be an integral part of an aircraft's avionics.

_djo_··on Yi Peng 3 crossed both cables C-Lion 1 and BSC at times matching when they broke
Indeed. The best way to understand Russia's approach to foreign policy is that it's an extension of its mafia state-derived domestic policy, where there are no true allies and anyone brought into the circle is tainted through compromising actions to ensure they stay loyal to you.

It's not dissimilar to the way criminal gangs will ensure that they have dirt on anyone joining or intentionally implicate others in order to ensure compliance.

_djo_··on Nordic neighbours release new advice on surviving war
Nearly all dictators do some beneficial civil works and other actions though. After all how else can they keep the population just happy enough to avoid rising up?

You're also assuming that the GMMR would not have been commissioned by another Libyan government, and perhaps even been completed more efficiently, had Gaddafi not seized power and held onto it for decades.

While NATO's bombing of the Brega plant was controversial, it was in my view justified by Gaddafi's forces staging rocket launchers at the location. If you're staging active military assets inside civilian locations, and they're part of hostilities, those locations lose their protection under international law.

The Brega plant was also not critical to the ongoing operation of the GMMR, as there was a second plant at Sarir that was able to make the pipe sections and had sufficient capacity to handle maintenance and sustainment needs.

_djo_··on In Memory of Stiver
Which analysts were those?

The ones I was reading emphasised the need for a strong sanctions regime with penalties for third party workarounds, with the reasoning given that Russia had prepared its economy for war and already isolated it to some extent.

Maybe your typical cable TV talking head pundit might’ve been confident about Russia’s economy collapsing, but the actual professional analysts and civil servants who advise governments were much more cautious.

_djo_··on Learning not to trust the All-In podcast
I have bad news for you.
_djo_··on Starship Flight 5: Launch and booster catch [video]
That straw man you’re arguing against might be convenient, but it does not represent the argument I made.

I merely said that Musk didn’t start from ‘nothing’ and complete poverty, as the OP’s post was claiming.

_djo_··on Starship Flight 5: Launch and booster catch [video]
Musk himself has said that he started Zip2 using money from himself, his brother Kimbal, Greg Nouri, and Silicon Valley angel investors.

Errol invested a bit later.

I didn’t say that $28 000 was a stratospheric amount, I said it’s something the vast majority of people don’t have access to, let alone the angel investors. They also don’t have access to the doors that were opened by his family’s connections.

Again, I’m not saying Musk was merely gifted his success. Clearly that’s not true, there were hundreds if not thousands of others with similar connections and opportunities who didn’t achieve anything near his success. But your assertion that he started from rock bottom and was entirely self made is far from an accurate representation of events.

_djo_··on Starship Flight 5: Launch and booster catch [video]
I’m referring to the original x.com, the bank that merged with PayPal.
_djo_··on Starship Flight 5: Launch and booster catch [video]
Errol Musk was one of several investors, and in any case the vast majority of people aren’t in a position to have their parents invest $28 000 (nearly $60 000 today) in an uncertain business venture.

> Musk was the richest man in the world when he acquired x.com. He didn't need family connections for that.

Source? Zip2’s sale only brought in $300 million. That’s not richest man in the world stuff.

You edited your comment to remove the bit about living in youth hostels and working menial jobs, this was my reply to it:

A rite of passage. It was quite common for upper middle class and wealthy South African kids to spend a year working menial jobs and living in hostels as a way to build character and find themselves. I know, personally, people who worked in tree clearing in Canada, picking fruit in Australia, manual labour at ski resorts in New England, and living in youth hostels all before going to university to start the courses their parents were paying full tuition fees for. All of the people I mentioned are doing well in their careers, because none were actually poor despite working manual labour jobs for a year.

_djo_··on Starship Flight 5: Launch and booster catch [video]
Without denigrating his achievements, which I can recognise and respect despite my distaste for his recent politics, that's not quite true. Musk came from a fairly wealthy and very well-connected family and was able to draw on those connections to secure opportunities that most others would not have had. That really helped when it came to sourcing funding for Zip2, and later in terms of getting someone like Bill Harris to be CEO of x.com.
_djo_··on Starship Flight 5: Launch and booster catch [video]
This booster is much, much larger than the Falcon 9 first stages that land on barges. It's ~70 metres high, versus ~40 metres for the Falcon 9 first stage, and weighs about 275 000 kg compared to the ~20 000 kg of the Falcon 9 first stage.

In short, it would require such huge and heavy landing legs and landing barges that it probably wouldn't be feasible.

_djo_··on Do U.S. ports need more automation?
I didn’t say they were managed by ATC, I said the airport has slots.

ATC’s role is to help manage the reshuffling when slots are missed, because there’s still finite landing and take off capacity at very busy airports.

In both cases it’s centrally managed, rather than a free for all.

_djo_··on Do U.S. ports need more automation?
That’s not the case globally. Heathrow for instance has strict slot time ranges. As does Schiphol.

Neither the UK nor the Netherlands choose to not enforce slot misuse. We’re not talking only about the US and the FAA as examples here.

Whether it’s an appropriate model for ports and especially truck traffic at ports is a different topic, one I’m not qualified to speak on. I was just pointing out the misconception on how airline traffic at airports works and how it’s certainly not just a first-come, first-served ad hoc model.

_djo_··on Do U.S. ports need more automation?
That’s actually not true for airlines, which are the better analogy here. For airline traffic airports have slots, which are basically appointments, attached to fixed flight schedules.

At the most congested airports slots are highly valuable, to the point where they’re often listed separately as part of an airline’s assets, and airlines will sometimes trade slots.

Many countries will fine airlines if they miss their slot time for reasons that aren’t related to emergencies or bad weather, as well as fine them for any other slot misuse such as hoarding, strategic cancellation, etc.

Now, sure, it’s not a case where if you miss the slot you can’t land or take off. The airport and ATC will always try to accommodate flights no matter what. But it usually means fairly substantial delays to avoid impacting on other take off, landing, and gate slots.

_djo_··on NASA Made the Hubble Telescope to Be Remade
That's really interesting information, thanks for sharing it.

And yes, the Hubble official history makes it clear that NASA intentionally sought to reuse industrial capacity and tooling developed for the NRO's surveillance satellite programme.

My point was only that the Hubble was not a donated KH-11, not that it didn't share the same industrial base as the NRO's satellites.

_djo_··on NASA Made the Hubble Telescope to Be Remade
Technically both Perkin-Elmer and Kodak had heritage, as Perkin-Elmer had made mirrors for the KH-9, but Kodak was making the KH-11 mirrors.

NASA initially considered a 3m main mirror for the HST, but opted for a 2.4m mirror especially to take advantage of the existing industrial base for 2.4m mirrors for the KH-11. As it was a proven industrial process that derisked the project and reduced cost compared to a 3m mirror.

_djo_··on NASA Made the Hubble Telescope to Be Remade
You're confusing two different programmes.

Hubble was a programme dating back to the 1960s as the Large Space Telescope (LST)[0], but first given the full go ahead in 1978. It was designed and developed in the open, with the Marshall Space Flight Center as the main design location.

The donated NRO satellites were the two donated in 2012[1] and were reportedly KH-11s. Only one of those is being developed into a space telescope, the Nancy Grace Roman Space Telescope. [2]

[0] https://science.nasa.gov/mission/hubble/overview/the-history...

[1] https://en.wikipedia.org/wiki/2012_National_Reconnaissance_O...

[2] https://en.wikipedia.org/wiki/Nancy_Grace_Roman_Space_Telesc...

_djo_··on NASA Made the Hubble Telescope to Be Remade
That's not accurate. You're thinking of the Nancy Grace Roman Space Telescope [0]

[0] https://en.wikipedia.org/wiki/2012_National_Reconnaissance_O...

_djo_··on FAA Guidance: Operating Near Hurricane Helene Recovery Efforts
Musk has proven himself again and again to be an unreliable and untrustworthy source in terms of his claims, and his status as an active and enthusiastic backer of Trump means he’s not a neutral observer either. I’m not going to take anything he says on this seriously until I see more credible reporting and confirmation.
_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
> these C&C networks don't control drones in the air. And most the people in the both fighting forces are mostly random ones really. If they got drones, frequently bought themselves or donated by volunteers - they fly them, if not - then not.

I didn't say they did. Being part of command and control networks means that troops are informed of air operations by their own side over radio or other communications channels.

> I don't know where you heard this. From what i heard - they frequently even can't discern whether this is their drone or an enemy's one.

From acquaintances and friends in the Ukrainian armed forces on or near the front lines.

_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
Is he trained in search and rescue? Flying into and landing in confined spaces? Assessing the suitability of disaster landing zones in terms of surface quality and debris?

None of that is part of the regular FAA-regulated private pilot training syllabus.

_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
He spoke to local first responders, not to the people actually coordinating the air response.

There are different ATCs and areas of responsibility. The only one the article says he spoke to was the Tower at an airport in Charlotte, over 100km away. They're only going to have been concerned with what he was doing in the immediate airport vicinity as crossing traffic, not where he was going to and what he'd be doing there.

There obviously wasn't a no-fly zone over Charlotte at the time, so the ATC would not have had to disseminate the info during their communications. Instead, that would be reflected in NOTAMS issued by the FAA.

_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
> that is because no drone-incorporating airspace control system exists right now. The question is why such a system is not even in planning stages.

There are several approaches to this problem, but it usually requires that the drones are all running compatible control and communication software. e.g. [0] https://www.flytbase.com/blog/drone-disaster-relief

> Is it so really? In Ukraine war a lot of de-facto random individuals from both sides are flying a lot of drones without pretty much any coordination and control system and in combat conditions, much tougher than civilian emergency, and mostly in FPV mode without direct LOS, frequently at night, yet no drone-helicopter/aircraft collisions have so far been reported (and everybody watching the aircraft and helicopter losses very closely)

Those people aren't random, they're part of organised military forces and are part of command and control networks. Troops do reduce certain types of drone activities when they're informed that their own aircraft will be overlying their positions. And that's even though both sides are flying comparatively few helicopter sorties at the front lines because of the constant threat from air defence.

As an aside, there have been collisions, at least one of which was intentional.

[0] https://www.flytbase.com/blog/drone-disaster-relief

_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
Not really. The no-fly zone still allows for military flights and any flights authorised by them or whoever else is performing the air traffic coordination.
_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
Which is why he should've reached out to the Carolina Emergency Response Team or a related organisation first, rather than the possibly-overwhelmed local first responders who have no role in coordinating the air response.
_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
The only ATC the article says he spoke to was the Tower at Charlotte-Douglas International, to get permission to fly over the airport. They only manage the area immediately around the airport, and it's not the ATC that's coordinating the disaster response and managing the aircraft over the disaster area.
_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
Random individuals flying their drones are a hazard to rescue helicopters and other aircraft.
_djo_··on Pilot flying Helene rescue missions in NC threatened with arrest
Please keep your comments within the HN Guidelines. There's no need for you to attack the person replying to you. [0]

[0] https://news.ycombinator.com/newsguidelines.html

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