SpaceX’s first Block 5 first stage for its Falcon 9 rocket, designed to fly a minimum of ten times, has returned to port after its first flight last week.

This is the most interesting detail revealed:

While not visible, the most significant improvements are likely to be found at the base of the first stage’s octaweb – now assembled with bolts instead of welds – in the form of a dramatically improved heat shield around its nine Merlin 1D engines (also upgraded, of course). One of the Falcon recovery technicians showed some exceptional interest in the shield and Merlins, likely documenting their condition in extreme detail to inform engineering reviews of the pathfinder rocket after its first flight test.

The pictures show those bolts quite clearly.

Capitalism in space: SpaceX today successfully placed in orbit Bangladesh’s first communications satellite, successfully using its upgraded Block 5 version of the Falcon 9 rocket, its first stage designed to be reused a minimum of ten times.

They successfully recovered the first stage, and will now take it apart to confirm this new version worked as planned. If so, it will be put back together and returned to service.

The leaders in the 2018 launch standings:

14 China
9 SpaceX
5 Russia
5 ULA

The U.S. and China are once again tied at 14 for the nation lead. SpaceX’s launch rate is presently double what it achieved last year, when it launched the most rockets of any private company ever.

The first launch of SpaceX’s Block 5 iteration of its Falcon 9 rocket was scrubbed today after an automatic abort at T-minus 59 seconds.

The next launch window is tomorrow afternoon. No word yet if they will go for that window.

On Tuesday Elon Musk released an image of a Falcon 9 fairing as its parafoil opened to slow and guide the fairing back to Earth.

The image is pretty, but doesn’t really provide any information about SpaceX’s effort to recover its rocket fairings. The next attempt should come during their next Vandenberg launch in mid-May.

In several tweets yesterday, Elon Musk said that SpaceX is considering using “a giant party balloon” to recover Falcon 9 upper stages.

No timetable was mentioned. It seems that Musk and SpaceX is still looking at ways to reuse the Falcon 9 upper stage. Whether this proposal ever makes it to hardware however is a different question. Musk and his engineers have floated many concepts over the years, not all of which have flown.

The balloon idea has some merit, as it has been successfully used to land landers and rovers on the Moon and Mars.

Despite tweets from Elon Musk suggesting it had hit the water at “high speed,” SpaceX’s recovery ship appears to have returned with one half of the fairing intact.

There are several images at the link showing the fairing on the ship. That it recovered it out of the water without damage seems surprising and unlikely. Nonetheless, that it looks intact means that the parafoil managed to slow it down enough to limit damage as it hit the water, and the company seems to be making real progress towards making these fairings reusable.

Capitalism in space: SpaceX this morning successfully placed ten Iridium satellites into orbit using its Falcon 9 rocket.

They did maneuver and landing tests with the first stage, which was making its second flight, but did not try to recover it. They did attempt to catch one half of the rocket’s fairing with their fast-moving ship and its giant net. No word yet on whether that attempt worked. Fairing recovery failed. See comments below.

The leaders in the 2018 launch standings:

9 China
6 SpaceX
4 Russia
3 Japan
3 ULA
2 Europe
2 India

The U.S. and China remain tied at nine for the lead in the national rankings.

SpaceX tonight successfully launched a commercial communications satellite. They did not recover the first stage because the seas were too rough to send out the drone ship.

The leaders in the 2018 launch standings:

7 China
5 SpaceX
3 Japan
3 ULA
2 Russia

Though I have removed Rocket Lab as an American company, crediting it instead to New Zealand, the U.S. still has 8 successful launches total, one more than China.

Link here. The article contains lots of good information and background, including some cost figures that suggest this recovery scheme will only work if they can recovery a lot of fairings while doing a lot of launches. Since SpaceX’s goal is to do a lot of launches, the numbers seem reasonable.

Capitalism in space: SpaceX today successfully launched a Spanish radar satellite.

They also intended to try to recover the rocket’s fairing, but they did not telecast this, and there is no word yet whether they were successful. In fact, their low-key approach here suggests a shift in policy. Previously, SpaceX was eager to show off its test programs. Now, this silence suggests a desire to throttle back on that openness, possibly in order to protect their proprietary engineering.

Update: It appears that at least one fairing half landed in the water intact, though that also means they were unable to catch it. According to a Musk tweet at the link, the fairing missed the ship net by “a few hundred meters.” Musk also indicates the need for larger chutes in the future. Either way, I wonder if the fairing in the water can still be reused.

The 2018 launch standings:

7 China
4 SpaceX
2 ULA
2 Russia
2 Japan

As a nation, the U.S. now has 7 launches total, tying China.

Link here. The article has some additional excellent images, but it was this paragraph that I thought was most significant:

To oversimplify, after launch, the payload fairing separates (mechanically) from the second stage once Falcon 9 or Heavy has left behind the majority of Earth’s atmosphere. After separation, each fairing half orients itself for a gentler reentry into the atmosphere with cold nitrogen gas thrusters, likely the exact same thrusters used in part to achieve Falcon 9’s accurate and reliable landings. Due to their massive surface area and comparatively tiny weight, fairing halves effectively become exceptionally finicky and awkward sails falling through the atmosphere at insane velocities, with the goal generally being to orient each half like a boat’s hull to provide some stability. Once they are low enough, assuming they’ve survived the journey from TEN TIMES THE SPEED OF SOUND and 62 MILES above Earth’s surface to a more reasonable ~Mach 0.5 and maybe 5 miles of altitude, the fun parts begin. At this point, each fairing half deploys a GPS-connected parachute system (a parasail, to be exact) capable of directing the massive hunks of carbon fiber and aluminum to a very specific point on the surface of the ocean.

What we don’t yet know is whether SpaceX will have cameras on the fairing, and if so, whether they will make those images available to the public, during launch.