NEBULA (Xīngyún, 星云) — China This rocket was supposed to be ready quite soon, so I knew I had to write it up, but for a long time I couldn’t because there was just nothing to say. Finally I just went ahead with what little I could find. I have no idea whether the company is even legit enough to be worth the effort. The company’s name is Shēnlán Hángtiān (深蓝航天), or Deep Blue Aerospace. Most of the more technical info I could gather is from the company’s website, which has a “中文|EN” language button that in the early days didn’t work. All I could gather between that and news reports is that the Nebula-1 will be a two stage smallsat launcher with maybe nine 3D-printed kerosene engines on the first stage, with a thrust of 360 kN apiece in vacuum. The engine is called the 深蓝雷霆-20 (Shēnlán léitíng-20, or Deep Blue Thunder-20), and rumor says it’s a closed-cycle engine, like maybe an oxygen-rich staged combustion design, but I have no confirmation. The upper stage apparently uses the same engine, presumably with a vacuum bell. Then the site also illustrates a Nebula-2 model, which is shown as a Nebula-1 with landing legs photoshopped on. So yeah, they plan to try for reuse with vertical landings. They also mention a Thunder-100 engine with 1000 kN of thrust. Apparently this will be for the Nebula-2, which will be larger, with a capacity goal of 4.5 tons. I think the picture showing a group of nine engines applies to this rocket. Some journalists said that they will attempt reuse on the Nebula-1, but I had no definite evidence for this claim until they actually tried a hop flight with it. It landed too hard and broke up, but before that it did successfully hover directly above the landing pad, after dropping about five kilometers. This was preceded by a small Nebula-M test vehicle. In the fall of 2021 this did a hop test, rising 100 meters and then landing on legs. That was preceded by a 10 meter hop. And now they are definitely going for reuse up front. The “M” hopper had electrically pumped engines. Not bad, but these guys might still be months or years from reaching orbit, let alone doing so reusably with a bigger rocket. But that didn’t stop them from claiming way back in 2020 that they would launch by the end of that year. But that first hop test of the full-sized Nebula didn’t happen until 2024. Nebula-1: Mass unknown, diam 2.25 m, thrust 2.7 MN?, imp unknown, type unknown (kerosene), payload ~0.7 t, cost unknown.