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SpaceX Starship flight tests include fifteen launches to date of prototype rockets during 2019–2024 for the SpaceX Starship launch vehicle development program. Eleven test flights were of single-stage Starship spacecraft flying low-altitude tests (2019–2021),[a][1] while four were orbital trajectory flights of the entire Starship launch vehicle (2023–2024), consisting of a Starship spacecraft second-stage prototype atop a Super Heavy first-stage booster prototype.[2] None of the flights to date has carried an operational payload. Additional flight tests are planned in 2024.
Designed and operated by private manufacturer SpaceX, the prototype Starship and Super Heavy vehicles flown to date are Starhopper, SN5, SN6, SN8, SN9, SN10, SN11, SN15, Ship 24/B7, Ship 25/B9, Ship 28/B10, and Ship 29/B11.[3][4][5][b]
Starship is planned to be a fully-reusable two-stage super heavy-lift launch vehicle,[6] and this affects expansion of the flight envelope during the long-running flight test program. Unusual for previous launch vehicle and spacecraft designs, the upper stage of Starship is intended to function both as a second stage to reach orbital velocity on launches from Earth, and also as a long-duration spacecraft.[7] It is being designed to take people to Mars and beyond into the Solar System.[8]
Nomenclature
SpaceX calls the entire launch vehicle "Starship", which consists of the Super Heavy first-stage booster and the ambiguously named Starship second-stage.[9] To avoid confusion, "Starship" in this article on the flight testing phase (2019–2024) means the second-stage, while the complete launch vehicle will be referred by the particular prototype booster and ship serial number. For example, the integrated flight test 1 booster was Booster 7 (B7), the spacecraft was Ship 24 (S24), and the launch vehicle stack is referred to as Ship 24/Booster 7, or S24/B7.[10]
The first tests started with the construction of an initial flight prototype in 2018, Starhopper, which performed several static fire tests plus two successful low-altitude flights in 2019.[11] SpaceX began constructing the first full-size Starship Mk1 and Mk2 upper-stage prototypes before 2019, at the SpaceX facilities in Boca Chica, Texas, and Cocoa, Florida, respectively. After the Mk prototypes, SpaceX began naming its new Starship upper-stage prototypes with the prefix "SN", short for "serial number".[12] Around mid-2021, SpaceX changed their naming scheme from "SN" to "Ship", or simply "S," for Starship vehicles,[13] and from "BN" to "Booster," or simply "B," for Super Heavy boosters.[14]
Vehicle testing
Starship prototype tests can generally be classified into three main types. In proof pressure tests, the vehicle's tanks are pressurized with either gases or liquids to test their strength, sometimes deliberately until they burst (known as a test to failure). In a static fire test, SpaceX loads the vehicle prototype with propellant and briefly fires its engines while the vehicle does not move.[15] Alternatively, the engines' turbopump spinning can be tested without firing the engines, referred to as a spin prime test.[16] Before a test flight, the vehicle performs mission rehearsals, with or without propellants, to check the vehicle and ground infrastructure.
Following successful testing, uncrewed flight tests and launches may take place. During a sub-orbital launch, Starship prototypes fly to a high altitude and then descend, landing either near the launch site or in the sea. During an orbital launch, Starship performs procedures as described in its mission profile.[15]: 19–22 The tests, flights, and launches of the Starship rocket have received significant media coverage due to SpaceX's relatively open approach to allowing outsiders to view the facilities.[17]
Upper-stage flight tests (2019–2021)
Launch outcomes
Launch outcomes | 2019 | 2020 | 2021 | Total |
---|---|---|---|---|
Success (tethered) | 2 | 0 | 0 | 2 |
Success (untethered) | 2 | 3 | 4 | 9 |
Total | 4 | 3 | 4 | 11 |
- Success (tethered)
- Success (untethered)
Landing outcomes
Landing outcomes | 2019 | 2020 | 2021 | Total |
---|---|---|---|---|
Loss before landing | 0 | 0 | 1 | 1 |
Loss on landing | 0 | 1 | 1 | 2 |
Loss after landing | 0 | 0 | 1 | 1 |
Success (tethered) | 2 | 0 | 0 | 2 |
Success (untethered) | 2 | 2 | 1 | 5 |
Total | 4 | 3 | 4 | 11 |
- Loss before landing
- Loss on landing
- Loss after landing
- Success (tethered)
- Success (untethered)
Flight No. |
Date and time (UTC) |
Vehicles | Launch site[c] | Flight apogee | Duration (mm:ss) | Launch outcome | Landing outcome |
---|---|---|---|---|---|---|---|
- | 3 April 2019 | Starhopper | Suborbital Launch Site | <0.3 m (1 ft 0 in) | ~00:03 | Success | — |
The first firing of Starhopper and the first tethered hop (according to Musk[18][19]). The burn was a few seconds in duration and the vehicle was tethered to the ground. The vehicle may have lifted off the ground, but only to a very small height, and it was not possible to see the lift off in public video recordings of the test.[19][20] | |||||||
- | 5 April 2019 | Starhopper | Suborbital Launch Site | 1 m (3 ft 3 in) | ~00:05 | Success | — |
Tethered hop which hit tether limits.[21] | |||||||
1 | 25 July 2019[22] | Starhopper | Suborbital Launch Site | 20 m (66 ft)[23] | ~00:22 | Success | Success |
First free (untethered) flight test. | |||||||
2 | 27 August 2019, 22:00[24][25] | Starhopper | Suborbital Launch Site | 150 m (490 ft)[24] | ~01:00[26] | Success | Success |
Starhopper was retired after this launch and used as a water tank at the production site.[24][27][28] | |||||||
3 | 4 August 2020, 23:57[29][30] | Starship SN5 | Suborbital Pad A | 150 m (490 ft)[29] | ~00:45 | Success | Success |
Second 150-meter hop, and first hop of a full Starship prototype.[31][32] | |||||||
4 | 3 September 2020, 17:47[33] | Starship SN6 | Suborbital Pad A | 150 m (490 ft)[34] | ~00:45 | Success | Success |
Third 150-meter hop, and second hop of a full Starship prototype.[33] | |||||||
5 | 9 December 2020,[35] 22:45 | Starship SN8 | Suborbital Pad A | 12.5 km (41,000 ft)[36] | 06:42 | Success | Failure |
First high-altitude flight test. Vehicle successfully launched, ascended, performed the skydive descent maneuver, relit the engines fueled from header tanks, and steered to the landing pad.[36][37] The flip maneuver from horizontal descent to vertical was successful, but a sudden pressure loss in the methane header tank caused by the flip maneuver reduced fuel supply and thrust, resulting in a hard landing and explosion.[36] | |||||||
6 | 2 February 2021,[38] 20:25 | Starship SN9 | Suborbital Pad B | 10 km (33,000 ft)[39][38][40] | 06:26[40] | Success | Failure |
A Raptor failing to start caused SN9 to over-rotate and hit the landing pad. The vehicle was destroyed on impact.[40][41][42][43] | |||||||
7 | 3 March 2021,[44][45] 23:15 | Starship SN10 | Suborbital Pad A | 10 km (33,000 ft)[46] | 06:24[47][d] | Success | Partial failure |
SN10 launched and ascended nominally, but experienced a hard landing with a slight lean after the landing, and a fire developed near the base of the rocket.[50] Eight minutes after landing, SN10 exploded,[46] potentially due to helium ingestion from the fuel header tank.[48] | |||||||
8 | 30 March 2021, 13:00[51] | Starship SN11 | Suborbital Pad B | 10 km (33,000 ft)[52] | 05:49[e][51] | Success | Failure |
SN11 had engine issues during ascent (according to Elon Musk).[53] Vehicle lost before T+6:00.[54][55] Musk stated that a "relatively small" methane leak caused a fire on one of the Raptor engines during ascent, causing the engine to experience a hard start when relit.[56] | |||||||
9 | 5 May 2021, 22:24[57] | Starship SN15 | Suborbital Pad A | 10 km (33,000 ft)[58] | 05:59 | Success | Success |
SN15 was a new iteration of prototype Starship with many upgrades over previous vehicles.[59] SN15 achieved a soft landing, with a small fire starting near the base shortly after landing. The post-flight fire was out within 20 minutes, and SN15 was retired by the end of the month and scrapped in July 2023.[60][61] |
Integrated flight tests (2023–)
The first Starship integrated flight test (IFT) took place on 20 April 2023, marking the beginning of the orbital test campaign.
Launch outcomes
Launch outcomes | 2023 | 2024 | 2025 | Total |
---|---|---|---|---|
Loss before staging | 1 | 0 | 0 | 1 |
Loss after staging | 1 | 0 | 0 | 1 |
Partial failure | 0 | 0 | 0 | 0 |
Success | 0 | 2 | 0 | 2 |
Planned | 0 | 7 | 1 | 8 |
Total | 2 | 9 | 1 | 12 |
- Loss before staging
- Loss after staging
- Partial failure
- Success
- Planned
Booster landing outcomes
Booster landing outcomes | 2023 | 2024 | 2025 | Total |
---|---|---|---|---|
Precluded | 1 | 0 | 0 | 1 |
Loss before landing | 1 | 0 | 0 | 1 |
Loss on landing | 0 | 1 | 0 | 1 |
Partial failure | 0 | 0 | 0 | 0 |
Success (splashdown) | 0 | 1 | 0 | 1 |
Planned (tower catch) | 0 | 0 | 0 | 0 |
Total | 2 | 2 | 0 | 4 |
- Precluded
- Loss before landing
- Loss on landing
- Partial failure
- Success (splashdown)
- Success (tower catch)
Starship landing outcomes
Starship landing outcomes | 2023 | 2024 | 2025 | Total |
---|---|---|---|---|
Precluded | 2 | 0 | 0 | 2 |
Loss before landing | 0 | 1 | 0 | 1 |
Loss on landing | 0 | 0 | 0 | 0 |
Partial failure | 0 | 0 | 0 | 0 |
Success (splashdown) | 0 | 1 | 0 | 1 |
Planned (tower catch) | 0 | 0 | 0 | 0 |
Total | 2 | 2 | 0 | 4 |
- Precluded
- Loss before landing
- Loss on landing
- Partial failure
- Success (splashdown)
- Success (tower catch)
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