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Crew Dragon is lifted off the deck of SpaceX recovery vessel GO Searcher after safely arriving at Port Canaveral, March 10th. (NASA) Crew Dragon is lifted off the deck of SpaceX recovery vessel GO Searcher after safely arriving at Port Canaveral, March 10th. (NASA)

SpaceX

SpaceX CEO Elon Musk says Crew Dragon reusability a “major improvement”

Crew Dragon is lifted off the deck of SpaceX recovery vessel GO Searcher after safely arriving at Port Canaveral, March 10th. (NASA)

Published

6 years ago

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SpaceX CEO Elon Musk says that the company’s next-generation Crew Dragon spacecraft is a “major improvement” over its Cargo Dragon (Dragon 1) predecessors after successfully demonstrating a number of reusability-focused upgrades during the vehicle’s launch and splashdown debut.

Even as SpaceX’s longer-term development groups aim to make the company’s Dragon spacecraft all but redundant with Starship and Super Heavy, the apparent success of Crew Dragon’s upgrades will be valuable for years to come. Ultimately, “major” improvements in reusability will allow SpaceX to reuse Dragon 2 far more efficiently, improving availability for both its Crew and Cargo programs and potentially cutting the operating cost and longevity of each spacecraft as the company begins to transition its workforce to BFR.

Although the question cuing Musk was non-specific, the SpaceX CEO immediately focused his reply on whether or not unspecified “upgrades” to Crew Dragon were able to keep sensitive hardware dry. SpaceX’s Cargo Dragon program has roughly seven years of experience with launching, recovering, and refurbishing orbital-class spacecraft after ocean landings and the subsequent seawater immersion. The fact that the Dragon 2 concept was almost immediately demonstrated with propulsive land-landing capabilities speaks to just how annoying a problem it was to try to keep an orbital spacecraft easily reusable while still relying upon water landing for recovery.

As it turns out, many of the engineering solutions best known to ensure structural and thermal integrity of a spacecraft on-orbit are often at ends with the separate task of ensuring that the same spacecraft remains thoroughly water-proof through launch, reentry, and splashdown. Many of these problems center around the materials that are best for each solution. The sorts of polymers (i.e. plastics) best known for their roles in sealing certain things off from other things are frequently very pliable, soft, and flexible. The orbital environment is extremely unfriendly to polymers like this, where constant and extreme thermal cycling couples with vacuum, radiation, and something known as atomic (or free radical) oxygen to rapidly turn pliable polymers brittle.

Different sealants and plastic or rubber gaskets are visible all over Crew Dragon, ranging from the red gasket around the nose cone area to white lines filling in gaps between the spacecraft’s dozens of different external panels.

A ‘brittle seal’, as many will know, is an oxymoron. Sealants that become brittle in space often scarcely behave like sealants at all after weeks (or months) in orbit, meaning that their ability to prevent moisture intrusion can be dramatically deteriorated. From an engineering perspective, Crew Dragon’s many seals and gaskets are first and foremost intended to protect the spacecraft from the elements while still on Earth, where static fire attempts and weather during launch windows could require it to weather extreme heat, cold, rainstorms, ice, and high winds. SpaceX engineers appear to have managed to solve the latter problem while also accounting for a need to protect the spacecraft after launch for the sake of easier refurbishment.

However, sealing the spacecraft from the elements – both before and after launch – is just one of many challenges for safe operations and efficient reusability. Up next, as Musk notes, is protecting Crew Dragon’s 16 Draco maneuvering thrusters and 8 SuperDraco abort thrusters from water damage, as well as sealing off vulnerable avionics for reuse. With respect to avionics, Musk is very likely referring to the electronics and sensing equipment housed under Dragon 2’s retractable nose cone, a new feature for SpaceX.

SpaceX's 'DragonFly' prototype was briefly used to test Dragon 2's propulsive landing capabilities before the program was cancelled. Most of the technology remains a part of Crew Dragon, however... (SpaceX)
Crew Dragon featured intriguing panels covering its Super Draco engine nozzles, presumably meant to prevent water from entering. (NASA)

Due to the fact that Crew Dragon’s SuperDraco abort thrusters are only meant to be used in a namesake abort scenario, SpaceX appears to have chosen to implement a more permanent solution for protecting them from water intrusion after splashdown. The challenge of panels like those covering the SuperDracos is that they need to be easily destructible to prevent a cascade of high-velocity debris from wreaking havoc in the event of ignition. They also need to survive the conditions on orbit, make it through the heat and buffeting of reentry and descent, and survive the initial impact with the ocean surface, all while keeping SuperDracos dry.

As such, it should come as no surprise to find CEO Elon Musk praising the engineering behind the presumably successful solutions to these complex problems, although credit is also due to the technicians that turned CAD files, test results, and aspirations into practical, functioning hardware.

An overview of the expected modifications needed to turn a Crew Dragon into a Cargo Dragon 2. (NASA OIG)

If Crew Dragon can achieve a similar level of success after spending more like half a year in space during operational crew transport missions, the spacecraft’s reusability improvements will end up benefiting both Crew Dragon and Cargo Dragon 2. The Cargo variant of Dragon 2 is designed as a relatively minor modification to flight-proven Crew Dragon capsules and slightly-upgraded trunks and could debut as early as mid-2020 after Cargo Dragon 1 enters retirement.

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Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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SpaceX and Elon Musk explain potential reasons for Starship loss

Published

2 months ago

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January 17, 2025

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Credit: SpaceX

SpaceX and its CEO Elon Musk are starting to shed some light on the potential reasoning for the loss of Starship yesterday, which was lost after a successful launch and catch of the lower-stage booster.

Starship was lost during its ascension, and debris rained down over the Caribbean less than an hour after SpaceX lost all communication with the spacecraft.

A few hours after the launch was over, SpaceX started to shed some light after looking at preliminary data that the rocket left behind.

The company said that a fire developed in the aft section of Starship:

“Following stage separation, the Starship upper stage successfully lit all six Raptor engines and performed its ascent burn to space. Prior to the burn’s completion, telemetry was lost with the vehicle after approximately eight and a half minutes of flight. Initial data indicates a fire developed in the aft section of the ship, leading to a rapid unscheduled disassembly with debris falling into the Atlantic Ocean within the predefined hazard areas.”

Additionally, Musk said that there was some sort of oxygen or fuel leak in the cavity above the ship engine firewall.

The leak was evidently large enough to build more pressure than the vent was able to handle:

Some also seemed to recognize evidence of fires throughout the flight of Starship, which is obviously an anomaly:

There will be more information regarding the loss of Starship in the coming days and weeks, but Musk already believes that a bit of fire suppression and more volume in the cavity above the ship engine firewall could fix the issue.

“Nothing so far suggests pushing next launch past next month,” he said, so Flight 8 could happen sometime in February.

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SpaceX completes second catch of lower stage, but loses Starship

Published

2 months ago

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January 16, 2025

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Credit: SpaceX

SpaceX completed its seventh launch of Starship on Thursday, accomplishing a clean liftoff and catch of the first-stage booster. However, the upper stage was lost after its ascent.

The launch took place just a few minutes after 5 p.m. on the East Coast, as the first attempts at getting Starship in the air for the seventh time were delayed by weather both last week and this week.

Conditions were favorable on Thursday as SpaceX looked to follow up a successful campaign by Blue Origin, Jeff Bezos’s company, earlier today.

SpaceX went into the seventh Starship launch with plans for a catch attempt of the first-stage booster, something it attempted and completed during the fifth test launch last year. It decided to skip a catch attempt with the sixth test flight as conditions were not aligned.

For now, SpaceX is extremely selective as to when it attempts catches.

However, it was successful during this attempt, its second completed catch:

This flight differed from previous launches as SpaceX rolled out several improvements to the rocket and the processes as it featured plans to do a Starlink deployment simulation and had various adjustments to flap placement and avionics.

These plans were disrupted by the fact that SpaceX lost all communications with Starship about ten minutes into the flight, which the aerospace company confirmed was a result of losing the spacecraft sometime during its ascent.

Although the catch was successful, the loss of the actual rocket seemed to be a huge damper on the entire event. SpaceX confirmed several minutes after the loss of communications that the rocket was destroyed and was lost.

It was its first failure since the second Starship launch in November 2023. SpaceX had no answers for why the rocket was destroyed and lost.

We will keep you updated in the coming days.

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SpaceX confirms next Starship launch target – Here’s when it will take off

Published

2 months ago

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January 9, 2025

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spacex starship upper stage catch
Credit: Elon Musk | X

SpaceX has confirmed a new target date for the seventh Starship test launch after weather in Texas delayed the first scheduled date for “three or four days.”

The company is now targeting the launch for Monday, January 13, at 4 p.m. CST or 5 p.m. EST. The launch date is not set in stone as any variety of delays could impact this, but SpaceX hopes to finally take off after a delay that pushed it back from January 10.

What’s new with this Starship launch

With this being the seventh test launch of Starship, there are several things that the company will change and hope to accomplish. All of these launches are done in preparation for eventually taking flight to Mars, something that will happen next year, according to CEO Elon Musk.

First, SpaceX is rolling out a next-generation ship with “significant upgrades.” Forward flaps have been made smaller and are repositioned away from the heat shield, which will “reduce their exposure to reentry heating.”

SpaceX eyes 25 annual Starship launches starting next year

There is also a 25 percent increase in propellant volume, a new fuel feedline system for the Raptor vacuum engines, and a better-than-ever propulsion avionics module that will control the valves and reading sensors.

Avionics, as a whole, underwent a redesign and now have more capability and redundancy for missions as they become more complex.

Starlink test

SpaceX is also planning to deploy 10 Starlink simulators that are similar in size and weight to the next-generation Starlink satellites:

“While in space, Starship will deploy 10 Starlink simulators, similar in size and weight to next-generation Starlink satellites as the first exercise of a satellite deploy mission. The Starlink simulators will be on the same suborbital trajectory as Starship, with splashdown targeted in the Indian Ocean. A relight of a single Raptor engine while in space is also planned.”

Ship return and catch

There will be several experiments that have to do with returning Starship and various catch scenarios and sequences. One of which will see “a significant number of tiles be removed to stress-test vulnerable areas across the vehicle.”

The ship’s reentry profile was also intentionally designed to test the structural limits of the flaps while at the point of maximum dynamic pressure during reentry.

Currently, SpaceX did not detail whether it would attempt another catch during this test launch. These are usually game-time decisions.

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Please email me with questions and comments at joey@teslarati.com. I’d love to chat! You can also reach me on Twitter @KlenderJoey, or if you have news tips, you can email us at tips@teslarati.com.

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