Tag: Falcon 9

The competition heats up: SpaceX on Tuesday revealed that last week it has completed the standard static fire testing of the recovered Falcon 9 first stage that it plans to relaunch in March.

A March launch would mean an 11-month turnaround, which is far from optimal, but understandable for the first time. SpaceX’s founder and chief executive, Elon Musk, has acknowledged the company must do better in the future if resuable flight is to become economically viable. He says the next—and likely final—iteration of the Falcon 9 rocket will be optimized for reuse. “Block 5 is the final upgrade of the Falcon architecture,” he tweeted earlier this year. “Significantly improves performance & ease of reusability. Flies end of year.”

It now seems likely that SpaceX will fly the landed boosters it currently has, at most once or twice, before retiring them, instead of multiple times. Although the company hasn’t elaborated on the problems with the engines, booster structure, or composite materials that have shown wear and tear after their orbital launches and returns, Musk is confident that changes to the Block 5 version of the rocket will solve the problem. “I think the F9 boosters could be used almost indefinitely, so long as there is scheduled maintenance and careful inspections,” he has said.

In other words, SpaceX has had — for the first time in history — the opportunity to inspect a number of used first stage rockets, and that precious knowledge is making it possible for them to upgrade the stage design to make future stages more hardy. In fact, those future stages won’t be stages, but reusable vessels that SpaceX could even name if it wished.

Because the launchpad at Kennedy is not quite ready for the planned February 3 launch of a commercial satellite, SpaceX has rearranged its launch manifest to switch that launch with the next Dragon mission to ISS, essentially delaying their next launch by two weeks.

With [launchpad] 39A still not ready to debut in its new role with SpaceX, the first mission set to launch from this pad – the Falcon 9 launch with EchoStar 23 – was pushed to the right a number of times. Although 39A is very close to being ready to conduct launches, EchoStar 23’s launch date was deemed to be too close to the mid-February target for the CRS-10 Dragon mission.

SpaceX and NASA discussed the situation on Friday night, before deciding it would be prudent to place EchoStar 23’s launch after CRS-10, allowing engineers to finalize modification and checkout work on the famous pad and simultaneously avoid a potential delay to the important Dragon mission to the Station.

The real problem here is that SpaceX had planned to have two working launchpads by this time, but doesn’t because their first pad was damaged in the September 1 Falcon 9 launchpad explosion. The consequences is that, for at least the next month, they will not be able to set a pace of a launch every two weeks.

The competition heats up: Even as SpaceX moves forward on an intense launch schedule, with launches planned for January 26 and February 8, it has begun preparations for a late February commercial launch that will be the first to reuse a first stage.

The first stage assigned to SES 10’s launch first flew April 8, 2016, with a Dragon supply ship on a logistics launch to the International Space Station. After detaching from the Falcon 9’s second stage, which continued into orbit, the 15-story first stage booster descended to a vertical landing on SpaceX’s offshore platform a few minutes after liftoff, making the first time the company recovered a rocket intact at sea.

The landing on SpaceX’s barge, or drone ship, last April came four months after the first-ever touchdown of a Falcon 9 first stage on land at Cape Canaveral. That vehicle is now on display outside SpaceX’s headquarters in Hawthorne, California.

This pace is calling for a launch every two weeks. It will spectacular if SpaceX can keep that up, but such a pace is not really unprecedented. The Soviets at their height managed it at times quite successfully.

The recovered Falcon 9 first stage from Saturday’s successful commercial launch has arrived in the port of Los Angeles.

Some nice pictures of the stage at the link.

One local news source now reports that SpaceX’s Falcon 9 launch has been delayed one day until Monday.

While officials announced at the start of week their plans to aim for a 10:28 a.m. Sunday departure, notices warning boaters and pilots of an upcoming launch now say the mission is targeting Monday, Jan. 9. The one-day delay means the launch time is expected to be a few minutes earlier to ensure the satellites are placed where needed in space.

This news has not yet been confirmed. The delay is now official.

SpaceX today released its final investigation results on the September 1 Falcon 9 launchpad explosion, and announced that they have now scheduled their next launch for January 8 out of Vandenberg Air Force Base.

As expected, the cause is the accumulation of solid oxygen in the wrappings of the helium bottle tank (COPV) inside the oxygen tank of the first stage. The following is their announced solution:

The corrective actions address all credible causes and focus on changes which avoid the conditions that led to these credible causes. In the short term, this entails changing the COPV configuration to allow warmer temperature helium to be loaded, as well as returning helium loading operations to a prior flight proven configuration based on operations used in over 700 successful COPV loads. In the long term, SpaceX will implement design changes to the COPVs to prevent buckles altogether, which will allow for faster loading operations.​

Their vagueness in describing the “prior flight proven configuration” is likely to protect proprietary information, but the overall solution suggests that their fuel loading operations will take longer.

The January 8 launch date was simultaneously announced on twitter.

SpaceX has begun placing the ten Iridium satellites inside their Falcon 9 housing in preparation for its next launch, now planned for no earlier than January 7.

The first 10 satellites for Iridium’s next-generation mobile voice and data relay network have been fueled, joined with their deployment module and encapsulated inside the clamshell-like nose cone of a SpaceX Falcon 9 booster for launch as soon as next week from Vandenberg Air Force Base in California. SpaceX and Iridium have not announced a target launch date, but engineers are aiming to have the mission ready for liftoff by Jan. 7. That schedule is still very preliminary.

An official target launch date is pending the Federal Aviation Administration’s approval of the SpaceX-led investigation into the explosion of a Falcon 9 rocket on a launch pad at Cape Canaveral on Sept. 1, which destroyed the Israeli-owned Amos 6 communications satellite awaiting liftoff a few days later.

The article also has this interesting tidbit:

After the Falcon 9 rocket completes its pre-flight “static fire” test on the launch pad — the same test that resulted in the explosion in Florida on Sept. 1 — the 10 Iridium Next satellites will be mated with the booster for liftoff.

This suggests that SpaceX is changing its launch procedures, whereby before it would do the static fire dress rehearsal with the payload already loaded on the rocket. For this launch at least they are going to do that dress rehearsal before installing the payload on the rocket.

In an update today on SpaceX’s September 1 Falcon 9 launchpad explosion investigation webpage, the company announced that its next launch will take place in early January, not mid-December as indicated in recent weeks.

We are finalizing the investigation into our September 1 anomaly and are working to complete the final steps necessary to safely and reliably return to flight, now in early January with the launch of Iridium-1. This allows for additional time to close-out vehicle preparations and complete extended testing to help ensure the highest possible level of mission assurance prior to launch.

Apparently they wish to do more testing to make sure they understand exactly what they need to do to avoid the conditions that caused the September 1 explosion. At the same time, they also think that an extra few weeks will be sufficient.

I have absolutely no details at this moment, but I have found out through sources at Vandenberg Air Force Base, where I have been scheduled to give a lecture next Wednesday, December 14, that the December 16 SpaceX launch there has been delayed.

If the launch was still on they wanted to delay my talk because too many people would miss it, working instead on the launch. My lecture is now on, as the launch has been cancelled.

This is not in the news yet. Stay tuned for more details.

It appears that SpaceX has definitely scheduled a launch of an EchoStar communications satellite for either January 8 or 9, and that this launch will follow the launch of 10 Iridium satellites in December.

If this schedule happens has now indicated, SpaceX will launch a lot of rockets over the next two months.

An explosion yesterday at SpaceX’s Texas test facility appears to have been planned and is part of the company’s investigation into the September 1 Falcon 9 launchpad explosion.

“The sound heard by residents was actually the result of a pressurization test at the McGregor Rocket R&D facility. These tests take place periodically at the site, and this particular test was part of the ongoing testing being conducted by our Accident Investigation Team,” SpaceX spokesman Phil Larson said in an email response to questions. “The volunteer fire department responded as a matter of procedure, but there was no damage to the site or injuries to any personnel.”

I would guess that they are trying to see if they can precisely duplicate the conditions that produced the September 1st explosion, including triggering new explosions in a reliable manner. If so, they would then know precisely what to avoid doing to trigger future tank failures.

Meanwhile, this story notes the successful first pressure tests of the carbon fiber tank that SpaceX is developing for its interplanetary spaceship. Not much information, though SpaceX has released some cool images of the tank being prepped for the test.

In a cable news interview today, Elon Musk reiterated recent reports that SpaceX expects to resume launches by the middle of December.

That the head of Inmarsat, one of SpaceX’s satellite customers, has confirmed this plan and appears to have no problem with it, suggests to me that SpaceX is on solid ground and that they have pinpointed a solution to the launchpad explosion that will not require any major re-engineering.

SpaceX today released an update on its investigation of the September 1 Falcon 9 launchpad explosion.

Previously, we announced the investigation was focusing on a breach in the cryogenic helium system of the second stage liquid oxygen tank. The root cause of the breach has not yet been confirmed, but attention has continued to narrow to one of the three composite overwrapped pressure vessels (COPVs) inside the LOX tank. Through extensive testing in Texas, SpaceX has shown that it can re-create a COPV failure entirely through helium loading conditions. These conditions are mainly affected by the temperature and pressure of the helium being loaded.

SpaceX’s efforts are now focused on two areas – finding the exact root cause, and developing improved helium loading conditions that allow SpaceX to reliably load Falcon 9. With the advanced state of the investigation, we also plan to resume stage testing in Texas in the coming days, while continuing to focus on completion of the investigation.

The report suggests that they are starting to pin down the very specific temperature and pressure conditions during loading of the helium tank that cause the problem, which also suggests they will soon also be able to adjust their procedures to avoid those conditions. This also suggests that they repeated assurances that they will be able to fly before the end of the year are not unreasonable.

This Wall Street Journal article today speculates that “problematic fueling procedures” might have caused the September 1 Falcon 9 launchpad explosion.

Company officials have said it is too early to arrive at definitive answers, though one person familiar with the investigation said initial concerns about potentially substandard welds have been relegated to a low priority. If testing bears out early findings focusing on problematic fueling practices instead of hardware flaws, SpaceX likely will avoid a major redesign effort or extensive quality-control checks that could drag on for months.

Caution must be exercised here. The article depends on unnamed sources, and does not provide any details describing how fueling procedures could have caused the explosion.

Unconfirmed and leaked statements made by Elon Musk at a National Reconnaissance Office presentation on October 13 suggest that the investigation is getting close to identifying the cause of the September 1 Falcon 9 launchpad explosion.

“It might have been formation of solid oxygen in the carbon over-wrap of one of the [helium] bottles in the upper stage tanks,” according to an excerpt of Musk’s remarks. “If it was liquid, it would have been squeezed out. But under pressure it could have ignited with the carbon. This is the leading theory right now, but it is subject to confirmation.”

Musk’s is also reported to have said that they found they could “…exactly replicate what happened on the launch pad if someone shoots the rocket.” He also dismissed this as a likely cause, though it has forced them to review their future launch security measures.

The article provides some very good additional analysis of the solid oxygen theory above. It suggests that though much of this technology has been used somewhat routinely in the launch industry for years, the specific environment used by SpaceX in its Falcon 9 rocket might have produced a new situation that caused the failure.

In interview today for Space News, SpaceX’s president Gwynne Shotwell revealed that the company is only offering a 10% launch discount for any satellite launch that uses a reused Falcon 9 first stage, not the 30% price break she had indicated in March.

Though the interview also touched upon SpaceX’s September 1 launchpad investigation, it did not include anything significantly new. Shotwell readily admitted that the company did consider sabotage as a possible cause, but always considered it unlikely and right now has pretty much dismissed it. She also remains confident that the company will resume launches this year.