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Still early days — Japan is studying a reusable rocket, but it wont fly before 2030 This launcher would replace the H3 rocket, which hasn’t yet become operational.

Stephen Clark – Oct 5, 2023 12:13 am UTC Enlarge / Japan’s first H3 rocket lifted off from the Tanegashima Space Center on a failed test flight in March.Photo by STR/JIJI Press/AFP via Getty Images reader comments 31 with

Japan debuted the new flagship H3 rocket in March, capping a decade-long, nearly $1.5 billion development effort to replace a launch vehicle that has been in service for more than 20 years. The H3’s upper stage failed to ignite a few minutes after liftoff, causing the rocket and its Earth observation payload to crash into the Pacific Ocean.

Officials in the Japanese government are already plotting the replacement for the H3 rocket, which had a goal of cutting in half the cost per launch of the H-2A launcher, a workhorse for Japan’s space program. But the H3 is based on a single-use, expendable design, like nearly all legacy rockets. The H3 design aims to achieve these cost savings through modernized manufacturing techniques and commonality in hardware with Japan’s smaller Epsilon rocket family.

The Japanese government updated its basic plan on space policy in June with language endorsing the development of a reusable rocket to follow the H3. Now, the Japan Aerospace Exploration Agency (JAXA) has tapped Mitsubishi Heavy Industries for joint studies on the next-generation launcher, which would have a recoverable and reusable first-stage booster, Space News reported this week.

There’s no design yet for this still-unnamed rocket. A JAXA spokesperson told Space News that engineers haven’t settled on a fuel. It could be cryogenic methane, the fuel favored by most companies developing new reusable launch rockets, or Japan could stick with liquid hydrogen, the super-cold fuel used on the H-2A and H3 rockets. Advertisement

The space policy document released by Japan’s Cabinet Office in June outlined several key technologies necessary for the country’s next-generation rocket. Those included rocket reuse tech, innovative materials, methane-fueled propulsion, and modernized production capabilities. Japanese policymakers wrote the new rocket, replacing the H3, would start flying in the 2030s.

“By reusing parts … we will improve launch frequency and transportation capacity, and reduce launch costs,” Japanese government officials wrote in the policy plan.

SpaceX’s demonstration of the benefits of reusable rockets has inspired others to pursue similar capabilities. Rocket Lab, the US-New Zealand company that operates the light-class Electron launcher for small satellites, has successfully recovered boosters and recently reused an engine from a previous flight. In the coming months, Rocket Lab plans to reuse an entire set of nine booster engines on a launch. The company is developing a new rocket named Neutron with a booster stage designed from the start to be entirely reusable.

Blue Origin and several other companies also may be a few years away from reusing boosters on their orbital-class rockets. United Launch Alliance’s new Vulcan rocket is powered by Blue Origin-built BE-4 engines. ULA plans to eventually recover the engines and reuse them but doesn’t plan to retrieve the entire first stage of the Vulcan rocket.

Other rocket builders, like Europe’s ArianeGroup, went all-in with a new expendable rocket, similar to Japan’s approach with the H3. Europe’s expendable Ariane 6 rocket won’t fly until next year, at the earliest. The European Space Agency and European industrial partners are in the early stages of designing a reusable methane-fueled engine that could lead, in the longer term, to a reusable replacement for the Ariane 6. But like Japan’s new reusable rocket study, a follow-on to the Ariane 6 would likely not fly until 2030 or later. Page: 1 2 Next → reader comments 31 with Stephen Clark Stephen Clark is a space reporter at Ars Technica, covering private space companies and the worlds space agencies. Stephen writes about the nexus of technology, science, policy, and business on and off the planet. Advertisement Channel Ars Technica ← Previous story Related Stories Today on Ars

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Scientists Warn Southern Ocean Could ‘Burp’ Stored Heat, Delaying Global Cooling for 100 Years

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New modelling suggests the Southern Ocean could one day release the vast heat it has stored from greenhouse gas pollution. If CO₂ levels were pushed to net-negative, deep convection may trigger a sudden “thermal burp” that warms the planet for decades. Though idealised, the study shows how Antarctica’s surrounding seas could shape long-term climate outcomes.

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Is Starmer continuing to mislead public over the budget?

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Is Starmer continuing to mislead public over the budget?

Did the chancellor mislead the public, and her own cabinet, before the budget?

It’s a good question, and we’ll come to it in a second, but let’s begin with an even bigger one: is the prime minister continuing to mislead the public over the budget?

The details are a bit complex but ultimately this all comes back to a rather simple question: why did the government raise taxes in last week’s budget? To judge from the prime minister’s responses at a news conference just this morning, you might have judged that the answer is: “because we had to”.

“There was an OBR productivity review,” he explained to one journalist. “The result of that was there was £16bn less than we might otherwise have had. That’s a difficult starting point for any budget.”

Politics latest: OBR boss resigns over budget leak

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Beth Rigby asks Keir Starmer if he misled the public

Time and time again throughout the news conference, he repeated the same point: the Office for Budget Responsibility had revised its forecasts for the UK economy and the upshot of that was that the government had a £16bn hole in its accounts. Keep that figure in your head for a bit, because it’s not without significance.

But for the time being, let’s take a step back and recall that budgets are mostly about the difference between two numbers: revenues and expenditure; tax and spending. This government has set itself a fiscal rule – that it needs, within a few years, to ensure that, after netting out investment, the tax bar needs to be higher than the spending bar.

At the time of the last budget, taxes were indeed higher than current spending, once the economic cycle is taken account of or, to put it in economists’ language, there was a surplus in the cyclically adjusted current budget. The chancellor had met her fiscal rule, by £9.9bn.

Pic: Reuters
Image:
Pic: Reuters

This, it’s worth saying, is not a very large margin by which to meet your fiscal rule. A typical budget can see revisions and changes that would swamp that in one fell swoop. And part of the explanation for why there has been so much speculation about tax rises over the summer is that the chancellor left herself so little “headroom” against the rule. And since everyone could see debt interest costs were going up, it seemed quite plausible that the government would have to raise taxes.

Then, over the summer, the OBR, whose job it is to make the official government forecasts, and to mark its fiscal homework, told the government it was also doing something else: reviewing the state of Britain’s productivity. This set alarm bells ringing in Downing Street – and understandably. The weaker productivity growth is, the less income we’re all earning, and the less income we’re earning, the less tax revenues there are going into the exchequer.

The early signs were that the productivity review would knock tens of billions of pounds off the chancellor’s “headroom” – that it could, in one fell swoop, wipe off that £9.9bn and send it into the red.

Read more:
Main budget announcements – at a glance
Enter your salary to see how the budget affects you

That is why stories began to brew through the summer that the chancellor was considering raising taxes. The Treasury was preparing itself for some grisly news. But here’s the interesting thing: when the bad news (that productivity review) did eventually arrive, it was far less grisly than expected.

True: the one-off productivity “hit” to the public finances was £16bn. But – and this is crucial – that was offset by a lot of other, much better news (at least from the exchequer’s perspective). Higher wage inflation meant higher expected tax revenues, not to mention a host of other impacts. All told, when everything was totted up, the hit to the public finances wasn’t £16bn but somewhere between £5bn and £6bn.

Please use Chrome browser for a more accessible video player

Budget winners and losers

Why is that number significant? Because it’s short of the chancellor’s existing £9.9bn headroom. Or, to put it another way, the OBR’s forecasting exercise was not enough to force her to raise taxes.

The decision to raise taxes, in other words, came down to something else. It came down to the fact that the government U-turned on a number of its welfare reforms over the summer. It came down to the fact that they wanted to axe the two-child benefits cap. And, on top of this, it came down to the fact that they wanted to raise their “headroom” against the fiscal rules from £9.9bn to over £20bn.

These are all perfectly logical reasons to raise tax – though some will disagree on their wisdom. But here’s the key thing: they are the chancellor and prime minister’s decisions. They are not knee-jerk responses to someone else’s bad news.

Yet when the prime minister explained his budget decisions, he focused mostly on that OBR report. In fact, worse, he selectively quoted the £16bn number from the productivity review without acknowledging that it was only one part of the story. That seems pretty misleading to me.

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Politics

Is Starmer continuing to mislead public over the budget?

Published

on

By

Is Starmer continuing to mislead public over the budget?

Did the chancellor mislead the public, and her own cabinet, before the budget?

It’s a good question, and we’ll come to it in a second, but let’s begin with an even bigger one: is the prime minister continuing to mislead the public over the budget?

The details are a bit complex but ultimately this all comes back to a rather simple question: why did the government raise taxes in last week’s budget? To judge from the prime minister’s responses at a news conference just this morning, you might have judged that the answer is: “because we had to”.

“There was an OBR productivity review,” he explained to one journalist. “The result of that was there was £16bn less than we might otherwise have had. That’s a difficult starting point for any budget.”

Politics latest: OBR boss resigns over budget leak

Please use Chrome browser for a more accessible video player

Beth Rigby asks Keir Starmer if he misled the public

Time and time again throughout the news conference, he repeated the same point: the Office for Budget Responsibility had revised its forecasts for the UK economy and the upshot of that was that the government had a £16bn hole in its accounts. Keep that figure in your head for a bit, because it’s not without significance.

But for the time being, let’s take a step back and recall that budgets are mostly about the difference between two numbers: revenues and expenditure; tax and spending. This government has set itself a fiscal rule – that it needs, within a few years, to ensure that, after netting out investment, the tax bar needs to be higher than the spending bar.

At the time of the last budget, taxes were indeed higher than current spending, once the economic cycle is taken account of or, to put it in economists’ language, there was a surplus in the cyclically adjusted current budget. The chancellor had met her fiscal rule, by £9.9bn.

Pic: Reuters
Image:
Pic: Reuters

This, it’s worth saying, is not a very large margin by which to meet your fiscal rule. A typical budget can see revisions and changes that would swamp that in one fell swoop. And part of the explanation for why there has been so much speculation about tax rises over the summer is that the chancellor left herself so little “headroom” against the rule. And since everyone could see debt interest costs were going up, it seemed quite plausible that the government would have to raise taxes.

Then, over the summer, the OBR, whose job it is to make the official government forecasts, and to mark its fiscal homework, told the government it was also doing something else: reviewing the state of Britain’s productivity. This set alarm bells ringing in Downing Street – and understandably. The weaker productivity growth is, the less income we’re all earning, and the less income we’re earning, the less tax revenues there are going into the exchequer.

The early signs were that the productivity review would knock tens of billions of pounds off the chancellor’s “headroom” – that it could, in one fell swoop, wipe off that £9.9bn and send it into the red.

Read more:
Main budget announcements – at a glance
Enter your salary to see how the budget affects you

That is why stories began to brew through the summer that the chancellor was considering raising taxes. The Treasury was preparing itself for some grisly news. But here’s the interesting thing: when the bad news (that productivity review) did eventually arrive, it was far less grisly than expected.

True: the one-off productivity “hit” to the public finances was £16bn. But – and this is crucial – that was offset by a lot of other, much better news (at least from the exchequer’s perspective). Higher wage inflation meant higher expected tax revenues, not to mention a host of other impacts. All told, when everything was totted up, the hit to the public finances wasn’t £16bn but somewhere between £5bn and £6bn.

Please use Chrome browser for a more accessible video player

Budget winners and losers

Why is that number significant? Because it’s short of the chancellor’s existing £9.9bn headroom. Or, to put it another way, the OBR’s forecasting exercise was not enough to force her to raise taxes.

The decision to raise taxes, in other words, came down to something else. It came down to the fact that the government U-turned on a number of its welfare reforms over the summer. It came down to the fact that they wanted to axe the two-child benefits cap. And, on top of this, it came down to the fact that they wanted to raise their “headroom” against the fiscal rules from £9.9bn to over £20bn.

These are all perfectly logical reasons to raise tax – though some will disagree on their wisdom. But here’s the key thing: they are the chancellor and prime minister’s decisions. They are not knee-jerk responses to someone else’s bad news.

Yet when the prime minister explained his budget decisions, he focused mostly on that OBR report. In fact, worse, he selectively quoted the £16bn number from the productivity review without acknowledging that it was only one part of the story. That seems pretty misleading to me.

Continue Reading

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