Tag: Callisto

Germany’s space agency DLR delivers one prototype leg for Europe’s Callisto grasshopper

8:45 am

Callisto's basic design
Callisto’s basic design

Government in-action: After a decade of work, the German space agency DLR this week finally delivered for testing a prototype leg of the Callisto grasshopper-type demo rocket, intended by the European Space Agency (ESA) to demonstrate vertical take-off and landing.

On 9 October, the Institute of Structures and Design announced that it had delivered a qualification model of the demonstrator’s landing leg to the Institute of Space Systems in Bremen. According to a 3 December 2024 update, the leg will now undergo a series of tests at the Institute’s Landing and Mobility Facility, including deployment, touchdown, and vibration testing.

Once the qualification test campaign is complete and the landing leg design has been validated, the Institute of Structures and Design will proceed with the construction of the four flight-ready legs.

Note again that Callisto, as shown to the right, was proposed as a joint ESA and JAXA project in 2015. Only now, a decade later, as DLR delivered one prototype leg. The first test hop has been repeatedly delayed, so that now it is now not expected to happen until 2027, and that rocket will not even be an operational version, it will simply be a small scale prototype.

Meanwhile, SpaceX has landed its Falcon 9 first stage hundreds of times, and reused them dozens of times. Other companies are flying or building their own reusable rockets, and hope to fly operational versions next year.

The contrast between this government project and the private sector is quite embarrassing. What makes it even more embarrassing is that it is par for the course, and yet so many people still look to the government as the god who can get things done. When will people learn?

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Europe once again delays test flights of its Callisto 1st stage hopper

11:05 am

Callisto's basic design
Callisto’s basic design

First proposed in 2015 as Europe’s answer to SpaceX’s Falcon 9, the first test flights of the European Space Agency (ESA)’s Callisto grasshopper-type reusable test prototype, as shown on the right, has once again been delayed, now from 2026 to 2027.

On Friday, CNES published a call seeking a partner to provide mechanical operations and procedures support ahead of the Callisto flight-test campaign, including contributions to operations user manuals, drafting mechanical operation procedures, and conducting detailed studies of mechanical interfaces between the vehicle and the ground segment. In the preamble to the scope of work, the notice states that the campaign will be carried out from the Guiana Space Centre in French Guiana in 2027. It will include an integration phase followed by eight test flights and two demonstration flights, all to be completed over a period of eight months.

The project, in which Japan’s space agency JAXA is participating, had an initial budget of $100 million, and originally planned to do its first hops in 2020. Instead, ESA spent a dozen years making powerpoint presentations, while SpaceX flew hundreds of operational flights with its Falcon 9, for profit.

Worse, this program is not attached to any rocket. It is a dead end. ESA and JAXA might get some useful engineering data from it, but it will belong to no one, and it is unclear anyone will care. At this moment it appears several private companies in Europe will have flown their own new rockets before Callisto even gets off the ground, and the data from those real rocket launches will be much more useful to them down the road.

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Juno detects the aurora of the moon Callisto in Jupiter’s atmosphere

10:19 am

Though previous observations had detected auroras on Jupiter produced by three of its four Galilean moons — Io, Europa, and Ganymede — scientists had until now been unable to detect a similar aurora produced by the fourth, Callisto.

The Jupiter orbiter Juno finally accomplished this observation for the first time.

[T]o image Callisto’s footprint, the main auroral oval needs to move aside while the polar region is being imaged. And to bring to bear Juno’s arsenal of instruments studying fields and particles, the spacecraft’s trajectory must carry it across the magnetic field line linking Callisto and Jupiter.

These two events serendipitously occurred during Juno’s 22nd orbit of the giant planet, in September 2019, revealing Callisto’s auroral footprint and providing a sample of the particle population, electromagnetic waves, and magnetic fields associated with the interaction.

The research paper describing this detection has just been published.

These secondary auroras are caused by Jupiter’s powerful magnetic field.

The Juno mission itself is about to end. NASA did not approve a mission extension, and next month the science team will send the spacecraft into Jupiter’s atmosphere, where it will burn up. We will then have to wait five years for Europa Clipper to arrive in Jupiter orbit, followed a year later by Europe’s Juice orbiter.

While the propaganda press is condemning this decision, there is some logic to it. Juno has mostly completed its work. While new knowledge can certainly be gained if it remained operations for three more years, the amount of knowledge will be relatively small. And NASA does face a budget crunch. Better to spend its money on other things that can produce more bang to the buck.

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After a decade of development, ESA finally starts testing a part of its Callisto grasshopper

9:12 am

Callisto's basic design
Callisto’s basic design

My heart be still! First proposed in 2015 as Europe’s answer to SpaceX’s Falcon 9, the European Space Agency, in partnership with Japan, has finally begun acoustical testing of just one part of its Callisto grasshopper-type reusable test prototype, as shown on the right.

Callisto consists of five main sections: the Aft Bay, which includes the engine and landing legs, the LH2 Tank, the LOx Tank, the VEB, and the Fairing. The VEB houses much of the demonstrator’s electronics, including its onboard computer, avionics, and a reaction control system that uses H2O2 propellant. Its distinctive features include a pair of control fins.

In addition to confirming that the VEB had been transported to the CNES facilities in Toulouse, the 4 March Institute of Space Systems update also revealed that the acoustic test campaign for the key Callisto module had commenced last week. The acoustic test campaign simulates the intense sound vibrations the demonstrator will experience during flight to ensure structural integrity and component reliability.

The whole project has a budget of $100 million. The first test hop won’t occur until 2026, eleven years after the project began, and six years behind its original launch date. In that same time, SpaceX has completed several hundred commercial landings of its Falcon 9 first stage, reusing those stages up to two dozen times.

Nor is Callisto part of any program to develop a similar reusable rocket. It is a typical dead-end government project, with ESA having no clear goal to apply it commercially. The best Europe can hope for is that the engineering lessons from its tests will be given freely to the new European commercial rocket startups, so that they can use it someday.

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First flight of government-built hopper to test vertical landings delayed two years

10:12 am

Callisto's basic design
Callisto’s basic design

This story about a first stage government-built Grasshopper-type rocket designed to demonstrate and test vertical landing has instead become a perfect demonstration of why governments should not design, build, and own anything.

It appears the first test flight of the Callisto test rocket, first proposed in 2015 and being built by a joint partnership of the German (DLR), French (CNES), and Japanese (JAXA) space agencies, has now slipped from 2024 to 2026.

Earlier this month, CNES deployed a refreshed website. Prior to that deployment, the agency’s Callisto project page had stated that the rocket’s first flight would occur in 2024. The new Callisto project page has a more detailed timeline, stating that the detailed design phase will be completed by the end of 2024. Vehicle integration in Japan is then expected in 2025, followed by a first launch from the Guiana Space Centre between 2025 and 2026. This revision outlines an approximate two-year slip in the project’s timeline. [emphasis mine]

These three agencies took almost a decade to simply conceive and design the project. Apparently they not yet even built anything. This despite a budget of slightly less than $100 million carved out of the entire budget for creating the Ariane-6 expendable. Compare that with SpaceX, which conceived its Grasshopper vertical test prototype in 2011, began flying that year, and resulted in an actual Falcon 9 first stage landing in 2015.

Will Callisto ever fly? Maybe, but don’t expect it to produce a rocket that is financially competitive with SpaceX. Instead, expect these three government agencies to subsidize its cost in order to make its price competitive on the open market. More likely Callisto will fly a few times, but will likely result in no new orbital rocket. Instead it will be superseded by the private rocket startups worldwide that are now building actual orbital rockets and will likely make them reuseable before Callisto even leaves the ground.

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Europe has decided to build a probe, dubbed JUICE, to study Ganymede, Callisto and Europa, Jupiter’s big icy moons.

5:31 pm

Europe has decided to build a probe to study Ganymede, Callisto and Europa, Jupiter’s big icy moons.

Known as JUICE, the Jupiter Icy Moons Explorer, the probe will enter orbit around the gas giant planet in 2030 for a series of flybys of Ganymede, Callisto and Europa. JUICE will brake into orbit around Ganymede, Jupiter’s largest moon, in 2032 for at least one year of close-up research.

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