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SpaceX to static fire Falcon 9 with a spacecraft on board for the first time in two years

The integrated DM-1 Crew Dragon 'stack' rolled out to Pad 39A for the first time in the first few days of 2019. (SpaceX)

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SpaceX has rolled Falcon 9 and Crew Dragon out to Pad 39A for the second time ever in preparation for a full wet dress rehearsal (WDR) and static fire – no earlier than Jan. 23 – of booster B1051’s nine Merlin 1D engines, preparing for an orbital launch attempt that slipped from NET Feb. 9 to Feb. 16 earlier this week.

While this milestone is important for myriad other reasons, it happens to be exceptionally unique thanks to one particularly surprising feature: Falcon 9 rolled out for its static fire with Crew Dragon (the rocket’s payload) still attached. This will be the first time in more than 28 months – since Amos-6, the last catastrophic Falcon 9 failure – that SpaceX has performed its routine on-pad static fire with a valuable payload attached to the rocket.

On September 1st, 2016, a SpaceX Falcon 9 experienced the rocket family’s second catastrophic failure ever when supercool liquid oxygen froze around a COPV’s carbon fiber wrappings, expanding just enough to breach the ultra-high-pressure vessel. Falcon 9 and its ~$200M Amos-6 satellite payload were completely destroyed, while Launch Complex 40 (LC-40) suffered tens of millions of dollars of damage that would effectively require it to be completely rebuilt over the course of more than a year.

After Amos-6, SpaceX immediately halted the practice of including customer payloads on Falcon 9 during static fires, used to save 24-48 hours of time between static fire and launch. SpaceX nevertheless retained the option if customers were to explicitly request it, otherwise wisely concluding (likely with more than a little encouragement from insurance companies) that expediting schedules by a few dozen hours was not worth the entirely unnecessary risk to satellite payloads that often cost hundreds of millions of dollars and take years to build.

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https://twitter.com/spiel2001/status/1087828282937102338

Given that SpaceX has stuck to that practice for all 38 Falcon 9 launches it has performed between Amos-6 and the present day, it seems all but guaranteed that the first orbit-ready Crew Dragon’s presence on Falcon 9 during its static fire has been done only at the specific request of the launch customer – in this case, NASA. It’s probably not hyperbolic to argue that Demo-1’s (DM-1) Crew Dragon is the most valuable, important, expensive, and irreplaceable spacecraft SpaceX has ever attempted to launch, having likely spent millions of work hours building, changing, refining, and testing it to meet NASA’s exacting and sometimes absurd requirements.

If Falcon 9 B1051 were to fail with Crew Dragon atop it during its Pad 39A static fire, it might be possible for the DM-2’s Crew Dragon to be completed and modified for an uncrewed test flight with just six months of delay, assuming Falcon 9’s mode of failure could be investigated and repaired to NASA’s satisfaction. However, the destruction of the DM-1 capsule and trunk could almost indefinitely delay SpaceX’s first crewed launch, dependent upon an inflight-abort test that is supposed to use the refurbished DM-1 capsule, while the Crew Dragon currently supposed to launch after DM-2 is unlikely to be ready before August or September 2019.

 

Ultimately, NASA likely requested that Crew Dragon remain atop Falcon 9 for this static fire out of some desire for a full-fidelity test environment and complement of data. There is perhaps a very limited chance that Crew Dragon will be fully fueled with hydrazine (MMH/NTO) and have its launch escape system (LES) active and ready to go in the event of a rocket failure.

Why they deemed the immense potential risk to be worthwhile is far less clear. Whether it is being done out of complacency or a desire for expediency or ultra-realistic test data, the risk is the same. In theory, Falcon 9 has been tested extensively and should operate perfectly, just as expected. So was Amos-6’s Falcon 9.

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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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Elon Musk

Tesla Roadster’s new patent preps white-knuckle speeds, keeping it grounded

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Credit: @BLKMDL3/Twitter

Ahead of its highly anticipated unveiling, Tesla’s upcoming Roadster received a new patent that aims to keep it grounded while enabling white-knuckle speeds.

The patent, which was granted on September 29, is titled “Electric Car Fan,” bluntly stating its design but not its purpose, which is further detailed in the text of the application. Interestingly, it comes two weeks before the Roadster event, which was delayed due to unfavorable weather on Thursday, which could cause issues, as Tesla revealed the event must be held outdoors.

The purpose is to solve a problem that is relatively unique to high-performance electric cars. Instant motor torque is useless if the tires cannot plant that force, and conventional wings and underbody tunnels generate downforce only when air is already rushing past the car. At launch, in slow corners, and under hard braking from modest speed, passive aerodynamic additions contribute essentially very little to downforce.

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Tesla’s filing says that its fans can produce the downforce needed, independent of vehicle velocity, then ease off so the same hardware does not pile on drag at highway speeds, an issue that can come from excessive body modifications.

The hardware outlined in the patent is a ducted-fan package that is placed into the rear of the vehicle. An underbody inlet between the rear wheels feeds a duct that rises to a wide outlet in the diffuser. In that outlet are four axial fans, which are divided by vertical strakes. They will pull air from under the floor and press the chassis onto the pavement.

The language in the patent claims it can cut drag rather than add to it while simultaneously increasing downforce.

Tesla Roadster event requires restricted airspace, and the FAA obliges

The fans run from the high-voltage battery and a vehicle control system, so output can be modulated rather than left on as a fixed penalty.

There are additional strengths that can come from this design, like extra tire load at low speed, which can contribute to even more face-melting acceleration rates, decrease stopping distance, and sharper turn-in before a wing has air to work with. Adjustable fan speed lets the car add grip only when needed, so it can be catered to the force of a turn or acceleration.

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These designs were previously used, and banned, in some competitive settings. The Brabham BT46B was banned in F1 competition for using a similar fan design and being labeled as too effective.

Tesla still lists the Roadster as having a sub-two-second 0-60 MPH time and a 250-plus-MPH top speed, and there are expectations for a SpaceX cold-gas thruster package that could not only increase acceleration but potentially cause the vehicle to hover.

It is important to note that a patent is not a production part, and packaging four fans in a rear diffuser, managing noise, and potential debris are all things Tesla must consider. With that being said, the patent being granted shows Tesla is designing the Roadster to go fast, but it is also attempting to use unique strategies to combat any issues it might have at those speeds.

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Elon Musk

SpaceX turned a heralding moment for Starship into its greatest

Starship reached orbit despite losing an engine, deployed 26 Starlink V3 satellites on Flight 14.

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SpaceX’s Starship reached orbit for the first time on Monday, and for a few nail-biting minutes it looked like it wouldn’t. During ascent on Flight 14, one of Ship 41’s six Raptor engines shut down early, and SpaceX’s livestream host Dan Huot told viewers the team had decided not to commit to orbit. Minutes later, after what Huot described as a lot of conversation in the control room, the final poll came back in favor, and a roughly 19 second burn of a single Raptor pushed the ship into orbit about 170 miles up.

The reversal matters because SpaceX had written the exit ramp into the mission plan. The company said it would only fire the orbital insertion burn if flight controllers confirmed enough backup hardware remained for the deorbit burn, a condition Teslarati laid out ahead of the flight. Losing an engine was exactly the scenario that rule was built for.

Pressing forward fits Elon Musk’s history. Falcon 1 failed three straight times before its fourth launch reached orbit in 2008, with SpaceX nearly out of money, and Starship was developed by flying prototypes until they broke. What changed this year SpaceX going public, and with $SPCX sliding below its IPO price in July when Flight 13 slipped, the short interest climbed significantly, as Teslarati reported at the time. A Starship potentially lost today with revenue generating next-gen Starlink satellites aboard would have landed directly on shareholders.

That pressure showed up after orbit. SpaceX cut a flight planned to last nearly 10 hours to about three, moving splashdown from west of Chile to the North Pacific near Hawaii. SpaceX gave no reason, though Musk said this month the company was being extremely cautious about debris risk. The single Raptor for deorbit worked, and Ship 41 completed its flip and landing burn before breaking apart in the water, an outcome SpaceX expected. Musk has structured SpaceX’s governance to shield long term bets from market pressure.

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The payload is the bigger business story. Musk posted that all 26 Starlink V3 satellites deployed and are “operating nominally.” Each V3 is rated for about 1 Tbps of downlink and 160 Gbps of uplink, so this single launch adds roughly 26 Tbps, about 10 times what a Falcon 9 load of V2 Mini satellites adds. The V3 is too large for Falcon 9, making Starship the only vehicle that can build out the planned 100,000 satellite constellation, at up to 60 per flight once it reaches routine service. Unlike the 20 V3 units on Flight 13, which reentered on a suborbital path, these will raise their orbits and could begin serving customers within weeks and bring in hundreds of millions of additional dollars in projected Starlink revenue.

SpaceX has already begun winding down Falcon 9 Starlink launches from Florida in favor of Starship. Reported targets put Flight 15 as early as October 19, leaving about three weeks to diagnose Monday’s engine shutdown before the next orbital attempt.

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Elon Musk

SpaceX just got the green light Starship has waited years for

The FAA has cleared Starship Flight 14, setting up SpaceX’s first orbital attempt on Monday.

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SpaceX has cleared the last regulatory hurdle standing between Starship and its first trip to orbit. The Federal Aviation Administration issued the launch license for Starship Flight 14 late Saturday, keeping the mission on track for liftoff Monday, September 28, from Pad 2 at Starbase, Texas.

The 75 minute launch window opens at 7:15 a.m. Central, and Boca Chica Beach closures are also scheduled for September 29 and 30 as backup dates. This will be Starship’s first revenue generating mission.

The license was the missing piece after SpaceX completed a full wet dress rehearsal with Booster 21 and Ship 41 on September 24. At the time, the company said the flight remained on track pending regulatory approval. Because Flight 14 flies an orbital profile, the FAA had to sign off on a modified license that met its safety, payload and financial responsibility requirements.

Observers combing through the new FAA paperwork also noticed that lightning no longer appears among Starship’s listed launch hazards. If that holds, it matters more for where Starship is headed than for Monday’s attempt. Florida and Louisiana, home to LC-39A and the planned Starbase Louisiana site, see some of the most frequent lightning in the United States.

SpaceX tells the FCC that Starship Flight 14 is going to orbit

Flight 14 is the mission SpaceX has been building toward for months. Ship 41 will carry 26 Starlink V3 satellites, the first operational V3 units to be deployed, and attempt roughly six orbits at about 275 kilometers over a flight lasting just under 10 hours. SpaceX says the ship will only perform its orbital insertion burn after flight controllers confirm enough hardware redundancy remains for the deorbit burn at the end of the mission. Ship 41 is targeting a splashdown in the Pacific west of Chile, while Super Heavy will return to the Gulf of Mexico.

The date carries some symbolism as well. A Monday launch would come 10 years and one day after Elon Musk first presented the Interplanetary Transport System, the design that became Starship, at the International Astronautical Congress in Guadalajara, Mexico.

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SpaceX has not announced what comes next, but air traffic planning slides reported this week, list Flight 15 no earlier than October 19 and a first Starship launch from LC-39A in Florida no earlier than October 30. Both dates depend on how Monday goes.

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