FROM THE NEST | SPRING 2023 | 35 space to the benefit of the Earth’s health. Until his sophomore year at Princeton, Weldon had still hoped to join NASA, but that year NASA changed its guidelines to exclude people with vision problems, and Weldon wears contact lenses. He has yet to make it into space, but Weldon is hopeful it will still happen. In the past 10 to 15 years, the private space flight industry has taken off. “I think it’s a very exciting time to be involved in the space industry because historically it was all government missions,” he said. Weldon and his team have worked on projects including New Shepard, a reusable suborbital rocket system designed to take astronauts and research payloads to the Kármán line—the internationally recognized boundary of space. Named after Alan Shepard, the first American to go to space, the rocket successfully completed its sixth human spaceflight and 22nd flight in August. Weldon’s team also develops rocket engines for outside companies and recently delivered new BE-4 engines for the first launch of United Launch Alliance’s next-generation Vulcan Centaur rocket. Blue Origin says BE-4 is the most powerful liquified natural gas engine to date and will end reliance on Russian engines. Weldon’s team is also working on New Glenn, named after astronaut John Glenn. Still in development, New Glenn will be a heavy-lift launch vehicle capable of carrying people and large payloads into space, such as parts of space stations and satellites. Blue Origin hopes to develop the infrastructure to move polluting industries into space as part of its long-term vision of millions of people living and working in space for the benefit of Earth. At Lehigh, Weldon worked with James Gilchrist, the Ruth H. and Sam Madrid Professor of Chemical and Biomolecular Engineering. Weldon was very driven from the get-go, Gilchrist said. “He was focused on research, he was focused on becoming an astronaut, he was focused on all sorts of extreme challenges,” Gilchrist said. “At the same time, he has always been an extremely humble person who always made a positive impact on those around him.” Weldon completed his doctoral research in Gilchrist’s Laboratory for Particle Mixing and Self-Organization and went on to do postdoctoral research in chemical engineering and scalable nanomanufacturing. Weldon also gained leadership experience serving as lab representative when Gilchrist was on sabbatical and when managing teams of interns as part of a summer internship program sponsored by the Howard Hughes Medical Institute. “When you work toward a Ph.D., it is expected your advisor will challenge you,” Gilchrist said. “Alex always challenged himself more than the challenges I gave him.” The experience helped Weldon transition into his position at Blue Origin, where he hopes to continue contributing to the evolving space industry. “Blue’s mission is really inspirational,” Weldon said. “It’s building the road toward millions of people living and working in space to benefit Earth. ... There are more opportunities for people to go into space every year.” —Christina Tatu “I ENJOY THE WAY I’M IMPACTING THE SPACE INDUSTRY NOW, AND I THINK THERE’S A LOT MORE OPPORTUNITIES FOR PRIVATE ASTRONAUTS.” —Alex Weldon ’14 Ph.D. 7-Meter Fairing New Glenn features more than twice the payload volume of any 5-meter class commercial launch system. Upper Stage The hydrogen upper stage is designed for demanding, highly energetic missions to LEO, MEO, GEO and beyond. Meet New Glenn The heavy-lift launch vehicle has been selected by NASA for a science mission to Mars. Fins The four forward fins are actuated aerodynamic control surfaces used for attitude adjustment during descent and landing of the first stage. Strakes Two wing-like strakes provide lift and crossrange for the reusable first stage as it flies back to Earth. Landing Gear The aft module houses six hydraulically actuated legs that support and secure the first stage during landing on a moving ship. BE-3U Engines The second stage is powered by two re-ignitable BE-3U engines delivering 1,100 kN (240,000 lbf) of thrust. Reusable First Stage The first stage of New Glenn is designed for reuse and requires minimal maintenance and inspection between flights. COURTESY OF BLUE ORIGIN
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