Terran 1 is a 2-stage to orbit small satellite launcher developed by Relativity Space. When fully integrated Terran 1 has a length of 32 meters (105ft) and a diameter of 2.3m (7.5ft). 

Relativity utilizes 3D printing to produce nearly all of the parts of the rocket, including the main engines and the structural components. This allows for fast, consistent and reliable production of vehicles, something which is vital to keep up with the ever-growing demand for launchers, particularly in the small-satellite market.

First Stage

Image Credit: Relativity Space / Trevor Mahlmann

The first stage of Terran 1 is the lower section of the rocket and provides the thrust required to get the second stage and its payloads out of the dense atmosphere of Earth where the second stage will take over. 

The first stage has a length of 24.3m (80ft) and uses 9 Aeon 1 engines which run CH4 and LOX as propellants with a maximum first stage thrust of 920kN (206,824 lbf). 

Block 2

Following the third flight of Terran 1, Relativity will move to Block 2. Block 2 consists of an upgraded first stage and upgrading from 9 Aeon 1 first stage engines to a single Aeon R engine - the same engine used on the company's upcoming Terran R medium-lift launch vehicle.

Second Stage

Image Credit: Relativity Space / Trevor Mahlmann

The second stage of the Terran 1 rocket is the portion of the rocket that is responsible for providing additional thrust and lift to the payload once it has reached the upper atmosphere and separated from the first stage. 

The second stage has a length of 8.1m (27ft) and uses a single AeroVac engine, burning CH4 and LOX like the first stage. The single AeroVac engine produces 126kN of thrust and 360s ISP.