Terran 1
Terran 1 is a two-stage, 3D printed, expendable, small-lift launch vehicle under development since 2017 by Relativity Space. Design. Terran 1 consists of two stages. The first stage is powered by nine Aeon 1 engines burning methane and oxygen propellants in a gas-generator cycle, each producing of thrust. The second stage is powered by a single vacuum-optimized version of Aeon 1, known as AeonVac, producing of thrust in vacuum. Both stages will be autogenously pressurized. The payload fairing measures long and has a diameter of . Terran 1 is capable of up to to low  Earth orbit, although Relativity commonly states a payload capacity of . The primary and secondary structures of Terran 1 are manufactured with Relativity's Stargate 3D printer out of a proprietary aluminum alloy. 90% of Terran 1 by mass consists of printed components; Relativity claims that they can reduce the part count in the vehicle by 100 times compared to traditionally-manufactured rockets and manufacture an entire flight article from raw materials in 60 days. Relativity's in-development Terran R launch vehicle will utilize the same tooling used to manufacture Terran 1. Relativity advertised a price per launch for Terran  1 of US$10 million in 2019. The advertised price per launch had been increased to US$12 million in 2021. Planned upgrades. In February 2022, Relativity CEO Tim Ellis stated in an interview with Ars Technica that the current configuration of Terran 1, with nine Aeon 1 engines on the first stage, will be replaced after the third flight with a stage featuring a single Aeon R engine with substantially higher thrust. The Aeon R engine is planned to be used on Relativity's much larger Terran R rocket. Launches. Relativity aims to conduct the first launch of Terran  1 in 2022.