Terran R Relativity’s Space heavy lift space launch vehicle

Terran R is a medium-to-heavy lift reusable rocket currently in development by Relativity Space. Designed to carry 23,500 kilograms to low earth orbit (LEO), the rocket is strategically sized for LEO constellations, large satellites, rideshare missions, and more. The two-stage rocket uses liquid natural gas (LNG) and liquid oxygen (LOX) as propellants, a combination often referred to as Methalox. Each Aeon R engine on the first stage is designed to produce a sea level thrust of 268,000 lbf, for a combined vehicle liftoff thrust of 3,484,000 lbf.

Terran R’s design is an evolution of best-in-class architecture solutions, with strategic design choices to prioritize efficiency, cost-savings, and time to market. Relativity Space is leveraging additive manufacturing alongside friction stir welding and the most advanced aluminum alloys to ensure a highly optimized structure. Several Constellium advanced alloys such as 2195, 2196, 2050, 2297, 7140 and 7160 were selected for a trade study. Final selection minimizes buy-to-fly ratio and assures a vehicle with a high safety margin for orbital missions. The paper will provide examples of innovative solutions and material selection methodology.