Humankind launched the first orbital satellite in October of 1957. Sixty-five years later, more than 5,000 satellites are in service, with roughly half of them placed into low earth orbit (LEO) over the past two years. Much of this activity comes courtesy of entrepreneur Elon Musk, whose SpaceX-launched satellite internet constellation Starlink will soon account for at least half of the objects circling our planet.
“We don’t think this rapid growth is an anomaly,” said Max Haot, founder and CEO of Launcher Inc., an aerospace firm in Hawthorne, California. “We think it’s the beginning of what’s to come. In fact, we believe there will be hundreds of thousands of small satellites in orbit within the next decade.”
Catching a ride
Haot plans to be a big part of what he refers to as a small satellite revolution. Later this year, Launcher will leverage the SpaceX SmallSat Rideshare Program to carry its Orbiter satellite transfer vehicle and platform into space, where it will deploy up to 400 kg worth of CubeSats and small satellites per mission and precisely place them into whatever orbit their owners desire. And beginning in 2024, the company will start offering its own launch service — Launcher Light — a liquid-fueled rocket measuring 15.2 m long and 1.1 in diameter that will carry 150 kg and 105 kg payloads into LEO and SSO (sun-synchronous orbit), respectively.
Orbiter is the top end of the rocket’s three-stage design, Haot explained, and somewhat ironically, was supposed to be the last part of the vehicle to be developed. But when SpaceX announced in early 2020 that it would begin selling payload space on its Falcon 9 rocket, Haot and the Launcher team realized they could make their satellite deployment system compatible with it and other launch platforms and decided to fast-track that part of the project.
“Seeing an opportunity to give our customers the best of both worlds, we brought Orbiter to the head of the line,” he said. “At the same time, we continue our work on the Launcher Light’s mechanical structures, the fairing, and, perhaps most importantly, the engine, all in preparation for its first commercial flight in 2024. So, it’s been a very exciting year, with 80% of the organization’s manufacturing capability focused on building our first Orbiter, which is flying in October of this year.”
Less costly launches
The goal is to make satellite deployment both easier and more affordable. Between the SpaceX RideShare program and Launcher’s Orbiter transfer vehicle, the startup firm will soon be able to place payloads into customized orbits for a little more than $8,000 per kilogram. “These ride shares occur every three months, but if SpaceX’s timing or trajectory does not meet our customers’ requirements, we’ll also have a premium launch service through our Launcher Light offering,” said Haot. “Either way, these services come at a price tag that’s unprecedented in the space industry.”
Haot and Launcher’s head of manufacturing, Tim Berry, are quick to point out that none of this would have been possible without additively manufactured metal components, the most challenging of which were produced on a Sapphire 3D printing system from Campbell, Calif.-based Velo3D.
“The Velo Sapphire, with its ability to reliably print complex geometry, made it very easy for us to pivot in the face of shifting priorities,” said Berry. “That’s a benefit of additive technology in general, but especially when you’re using a highly-capable print platform.”
He should know. Before joining Launcher, Berry worked at SpaceX for close to a decade. During this time, he led the Falcon 9’s second stage integration team, followed by leadership roles on the Dragon’s crew and cargo capsules before transitioning to head of additive manufacturing. Today he oversees Launcher’s 24,000 sq. ft. factory floor and its machinists, welders, and technicians, as well as the company’s small fleet of metal 3D printers, chief among them the Sapphire systems from Velo3D.
Meeting the challenge
As noted earlier, Launcher began its most recent development efforts with the Orbiter rather than the rocket’s main stage that would carry it into space. And since no rocket flies without a rocket engine, Launcher licensed the drawing for a space-proven turbopump, then set about improving its design using additive manufacturing (AM) technology.
Unfortunately, no metal AM equipment provider could produce many of the necessary components. One notable example is the engine’s shrouded impeller, an extremely critical and complex Inconel part that spins at 30,000 rpm, must withstand more than 300 bar of outlet pressure, and is filled with notoriously hard-to-print zero-degree angle surfaces.
Berry pointed to the fuel tanks as another typical example. “Shop around for a space-graded tank able to withstand 3,000 psi of pressure, and you’ll probably hear lead times of eight months to two years, especially if they’re custom,” he said. “That’s not an option in our environment, so as with many of our components, we took the approach of designing based on our available tools.”
As it so happens, the Orbiter’s 22-liter tanks exactly match the Sapphire’s build volume. Launcher began by printing the parts out of Inconel, and although they performed quite well, Berry and the team started looking for ways to optimize the design. Moving to lighter-weight titanium was the obvious choice.
“That’s what brought us to our second machine from Velo3D,” he explained. “It can print the exact same tank but with less weight and higher-pressure capabilities. We already thinned the walls a bit compared to the original design, but once we have the first few launches under our belt, we’ll probably reduce them even further as we continue to push the envelope.”
Building on success
That’s one of the most significant advantages of having in-house printing capabilities, he noted, as Launcher can continually push for more aggressive designs and higher performance without losing time or spending much money. As such, the company is 3D printing various components on its Sapphire systems, including brackets and other secondary structures, combustion chambers, and injectors.
Haot addressed one of the criticisms he and Berry had heard from others when shopping for a 3D printer. “Some people complain that the Velo system is closed in terms of materials and laser settings,” he said. “For me, that’s a positive rather than a negative.”
Filed Under: 3D printing • additive manufacturing • stereolithography