Manufacturer | Relativity Space |
---|---|
Country of origin | United States |
Cost per launch | US$12 million [1] |
Size | |
Height | 35.2 m (115 ft) |
Diameter | 2.3 m (7 ft 7 in) |
Stages | 2 |
Capacity | |
Payload to LEO | |
Altitude | 300 km (190 mi) |
Orbital inclination | 28.5° |
Mass | 1,479 kg (3,261 lb) |
Payload to SSO | |
Altitude | 500 km (310 mi) |
Mass | 898 kg (1,980 lb) |
Launch history | |
Status | Retired |
Launch sites | CCSFS LC-16 VSFB Building 330 |
Total launches | 1 |
Failure(s) | 1 |
First flight | 23 March 2023 |
First stage | |
Height | 24.3 m (80 ft) |
Diameter | 2.3 m (7 ft 7 in) |
Powered by | 9×Aeon 1 |
Maximum thrust | 920 kN (207,000 lbf) |
Propellant | LCH4 / LOX |
Second stage | |
Height | 8.1 m (27 ft) |
Diameter | 2.3 m (7 ft 7 in) |
Powered by | 1×AeonVac |
Maximum thrust | 126 kN (28,300 lbf) |
Propellant | LCH4 / LOX |
Terran 1 was an expendable two-stage small-lift launch vehicle developed by Relativity Space. Development began in 2017 and the rocket was retired in 2023. [2] Most structures and components of the vehicle are manufactured with 3D printing processes. [3]
Terran 1's first and only launch took place March 23,2023 from Cape Canaveral,but did not achieve orbit due to a failure of the second stage. [3] Following the failed launch,Relativity retired the rocket in favor of developing the much larger,reusable Terran R vehicle. [4]
Terran 1 consisted of two stages. The first stage is powered by nine Aeon 1 engines burning methane and oxygen propellants (methalox) in a gas-generator cycle,each producing 100 kN (23,000 lbf) of thrust. The second stage is powered by a single vacuum-optimized version of Aeon 1, [5] known as AeonVac,producing 126 kN (28,300 lbf) of thrust in vacuum. [6] Both stages are autogenously pressurized. [7]
The vehicle's (notional) payload fairing measures 6.8 m (22 ft) long and 3 m (9.8 ft) in diameter. Payload capacity was specified to be 1,250 kg (2,760 lb) to lower inclination low-Earth orbits and 900 kg (2,000 lb) to a Sun-synchronous orbit (SSO). [8] [6] [9] In any case,the vehicle never carried payloads,its sole launch featured an inert nosecone in place of a functional clamshell fairing.
The primary and secondary structures of Terran 1 were manufactured with Relativity's Stargate 3D printer,which welded structures together from aluminum alloy. [8] 90% of Terran 1 by mass consisted of printed components; [8] Relativity claimed that they could 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. [8] [10] Relativity's in-development Terran R launch vehicle will utilize the same tooling used to manufacture Terran 1. [5] [11]
Relativity advertised a price per launch for Terran 1 of US$10 million in 2019. [12] The advertised price per launch had been increased to $12 million USD in 2021. [5]
In February 2022,Relativity CEO Tim Ellis stated in an interview with Ars Technica the nine Aeon 1 engines on the first stage could be replaced with 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. [13] The upgrade was planned to debut on the fourth flight of Terran 1 before the program was cancelled. [13]
Relativity received a Federal Aviation Administration (FAA) launch license to conduct the first launch of Terran 1,not-earlier-than (NET) 8 March 2023 from Cape Canaveral Space Force Station's Launch Complex 16. [14] Originally,another static fire was planned with the full rocket stack before first launch. Relativity believed it performed enough tests and instead attempted a launch. [7] Terran 1's initial flight scheduled for 8 March 2023 was scrubbed due to "exceeding launch commit criteria limits for propellant thermal conditions on stage two". A second launch attempt on 11 March was also scrubbed. Set for 18:00 UTC (14:00 EDT),high upper-level winds prevented liftoff for over an hour. A second attempt at 19:35 UTC (15:35 EDT) was cancelled at T-70 seconds from a boat in the launch safety range. A third attempt at 19:42 UTC (15:42 EDT) was cancelled half a second before liftoff. The engines briefly lit up before shutting down from a "launch commit criteria violation". A final attempt occurred at 21:00 UTC (17:00 EDT). An issue with the automatic stage separation promptly closed the launch window. [15]
Another launch window for Terran 1's initial flight opened on March 23. After holding twice from a boat in the launch safety range,and high upper-level winds,the rocket lifted off at 03:25 UTC (23:25 EDT). Following a nominal liftoff and powered flight of the first stage,the second stage failed to ignite,leading to the loss of the mission. Preliminary investigations blamed the failure on a slower-than-expected valve opening as well as vapor ingestion into the liquid oxygen turbopump causing reduced performance. [4] Although the launch did not orbit,Relativity acknowledged the successful performance of the vehicle's 3D printed structures under flight loads. [16]
Following the loss of the first mission,the company abandoned further plans for Terran 1,instead choosing to focus efforts on developing the much larger reusable Terran R vehicle. Existing payloads on Terran 1 will likely have to be remanifested to Terran R or other flights. [4]
Flight No. | Date and time (UTC) | Launch site | Payload | Payload mass | Orbit | Customer | Outcome |
---|---|---|---|---|---|---|---|
1 | 23 March 2023,03:25 [2] | LC-16 | None | None | LEO | Test flight | Failure |
First flight of Terran 1,with the mission name "Good Luck,Have Fun". Instead of a payload,the non-deploying nose cone carried a metal ring,which was an early test article from Relativity's 3D printing process,weighing approximately 1.5 kg. [17] A stated goal for the mission was to demonstrate the viability of 3D printing for major structural components of a rocket,the first such components to be used in an orbital launch attempt. These were proven in flight when Terran 1 passed max q and continued to perform nominally. After stage separation,the second stage failed to ignite,ending the mission. [18] | |||||||
2 | March 2023 | LC-16 | VCLS Demo-2R | LEO | NASA | Cancelled | |
$3 million contract for unspecified payload(s) in NASA's Venture Class Launch Services (VCLS) 2 program. [19] The ELaNa 42 mission,consisting of three CubeSats,would have launched on this flight. [20] | |||||||
3 | 2023 | LC-16 | Undisclosed | Undisclosed | Cancelled | ||
Third flight of Terran 1,as detailed by Tim Ellis in an interview,would have carried a payload for an undisclosed customer. [13] Would have been last flight of Terran 1 before previously planned block upgrade. | |||||||
NET 2023 | Rideshare | LEO | Spaceflight,Inc. | Cancelled | |||
Contract with Spaceflight included first flight in Q3 2021,with option for additional flights in the future. [21] | |||||||
NET 2023 | Rideshare | 10–350 kg | GEO | Momentus | Cancelled | ||
The 2019 contract with Momentus included a first flight originally scheduled for 2021,with option for five additional flights in the future. The five flights would have included the launch of a Momentus Vigoride Extended space tug. [22] | |||||||
NET 2023 | LEO | Mu Space | Cancelled | ||||
Dedicated launch for mu Space,would have carried a single payload. [23] | |||||||
NET 2023 | LC-16 / B330 | Rideshare | LEO | TriSept | Cancelled | ||
Launch site would have been either be Cape Canaveral or Vandenberg. TriSept stated that the launch would have featured one large primary payload accompanied with several smaller payloads. [24] | |||||||
2023 | LEO | DoD (STP) | Cancelled | ||||
Single flight carrying "small U.S. military payload",price not disclosed. [9] | |||||||
NET 2023 [25] | B330 | Iridium NEXT ×1 | LEO (86.4°) | Iridium | Cancelled | ||
Iridium has ordered a Terran to launch one of the 6 on-orbit spares for their satellite constellation. | |||||||
Telesat (unspecified quantity) | LEO | Telesat | Cancelled | ||||
Unspecified number of launches for an unspecified number of satellites. [12] |
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