Scout X-1
Size
Launch of Explorer 9 on a Scout X-1
Function	Expendable launch system Sounding rocket
Manufacturer	Vought
Country of origin	United States
Height	25 m (82 ft)
Diameter	1.01 m (3 ft 4 in)
Mass	16,240 kg (35,800 lb)
Stages	Four
Associated rockets
Family	Scout
Derivative work	Scout X-1A Blue Scout I Blue Scout II
Launch history
Status	Retired
Launch sites	Wallops LA-3
Total launches	7
Success(es)	3
Failure(s)	4
First flight	1960-07-02
Last flight	1961-10-19

First stage – Algol 1B
Powered by	1 solid
Maximum thrust	471 kN (106,000 lb_f)
Specific impulse	236 seconds
Burn time	40 seconds
Propellant	Solid
Second stage – Castor 1A
Powered by	1 solid
Maximum thrust	286 kN (64,000 lb_f)
Specific impulse	247 seconds
Burn time	27 seconds
Propellant	Solid
Third stage – Antares 1A
Powered by	1 X-254
Maximum thrust	60 kN (13,000 lb_f)
Specific impulse	256 seconds
Burn time	39 seconds
Propellant	Solid
Fourth stage – Altair 1A
Powered by	1 X-248A
Maximum thrust	14 kN (3,100 lb_f)
Specific impulse	255 seconds
Burn time	40 seconds
Propellant	Solid

[edit on Wikidata]

Scout X-1 was an American expendable launch system and sounding rocket which was flown seven times between August 1960 and October 1961. Four orbital and three suborbital launches were made, with four of the launches resulting in failures.^[1]

The Scout X-1 was similar to the Scout X test vehicle which was launched in April 1960, however it had live second and fourth stages, as opposed to the battleship versions used on the Scout X. It also featured an improved first stage, using an Algol 1B instead of the earlier Algol 1A used on the Scout X.^[1]^[2]

Several derivatives of the Scout X-1 were also flown. The United States Navy developed the Blue Scout, which was a three-stage sounding rocket, and the Blue Scout II which was almost identical to the Scout X-1. The Scout X-1A, a five-stage variant of the Scout X-1, was used for a single suborbital launch in March 1962. It featured an improved first stage, and a NOTS-17 upper stage.

Launches

Scout X-1 was flown seven times between August 1960 and October 1961 from Launch Area 3 at the Wallops Flight Facility.^[1]^[2]

The maiden flight was a suborbital test of the rocket's systems, and was conducted on 2 July 1960, with the rocket launching at 00:04 GMT. Following this, a suborbital radiation experiment was successfully launched on 4 October 1960. The first orbital launch attempt, with the S-56 satellite, was made on 4 December 1960, and ended in failure after the second stage malfunctioned.^[1]^[2]

On 16 February 1961, a Scout X-1 successfully placed Explorer 9, a reflight of the failed S-56, into Earth orbit, in the first successful orbital launch to be conducted by a Scout rocket. The next launch attempt on 30 June 1961 carried the S-55 satellite, but this did not reach orbit because the third stage failed to ignite. A reflight of S-55, Explorer 13, was launched on 25 August 1961, but reached a lower than planned orbit, and was unusable. The final flight of the Scout X-1 was made on 19 October 1961, carrying plasma and aeronomy research payloads on a suborbital trajectory. This launch was successful.^[1]^[2]

Date	Serial	Mission Description	Nation	Agency	Apogee (km)
1960 July 2	ST-1	Suborbital test, failure	USA	NASA	1380
1960 October 4	ST-2	Radiation Probe Plasma mission	USA	NASA	5600
1960 December 4	ST-3	S-56, failure (second stage malfunction)	USA	NASA
1961 February 16	ST-4	Explorer 9	USA	USAF	2433
1961 June 30	ST-5	S-55, failure (third stage did not ignite)	USA	NASA
1961 August 25	ST-6	Explorer 13, partial failure	USA	NASA
1961 October 19	ST-7	P-21 Plasma / aeronomy mission	USA	NASA	6855

Scout X-1 ST-1 (July 2, 1960)
Scout X-1 ST-2 (October 4, 1960)
Scout X-1 ST-3 assembly (December 1960)
Scout X-1 ST-4 with Explorer 9 (February 16, 1961)

References

^ ^a ^b ^c ^d ^e Krebs, Gunter. "Scout-X1". Gunter's Space Page. Gunter's Space Page. Retrieved 17 October 2023.
^ ^a ^b ^c ^d Wade, Mark. "Scout X-1". www.astronautix.com. Encyclopedia Astronautica. Retrieved 17 October 2023.

McDowell, Jonathan. "Scout". Orbital & Suborbital Launch Database. Jonathan's Space Report. Retrieved 19 June 2009.
Heyman, Jos; Parsch, Andreas (9 July 2007). "LTV SLV-1 Scout". Appendix 3: Space Vehicles. Directory of U.S. Military Rockets and Missiles. Retrieved 19 June 2009.

Scout rockets

Main articles

Rockets

Scout X	Scout X Scout X-1 Scout X-1A Scout X-2 Scout X-2B Scout X-2M Scout X-3 Scout X-3A Scout X-3C Scout X-3M Scout X-4 Scout X-4A Scout X-5C
Blue Scout	Blue Scout Junior Blue Scout I Blue Scout II
Later Series	Scout A Scout A-1 Scout B Scout B-1 Scout D-1 Scout E-1 Scout F-1 Scout G-1 Scout 2 Test Vehicle
Cancelled	Scout A-2 Scout B-2 Scout C Scout 2
Other	RAM-B

Launch sites

Components

Alcyone
Algol
Altair
Antares
Castor
MG-18
NOTS-17

v t e Orbital launch systems
List of orbital launch systems Comparison of orbital launch systems
Current	Angara 1.2 A5 Atlas V Ceres 1 1S Chollima-1 Delta IV Heavy Electron Epsilon Falcon 9 Block 5 Falcon Heavy Firefly Alpha Gravity-1 GSLV H-IIA H3^† Hyperbola-1 Jielong 1 3 Kaituozhe 2 Kinetica-1 Kuaizhou 1 1A 11 Long March 2C 2D 2F 3A 3B/E 3C 4B 4C 5 5B 6 6A 7 7A 8 11 11H LVM3 Minotaur I IV V C Nuri OS-M1^† Pegasus XL Proton-M PSLV Qaem 100 Qased RS1^† Shavit 2 Simorgh SLS Block 1 Soyuz-2 2.1a / STA 2.1b / STB 2-1v SSLV Starship^† Tianlong-2 Unha Vega original C Vulcan Centaur Zenit 3SL 3SLB 3F Zhuque 2
In development	Antares 330 Ariane 6 Bloostar Cyclone-4M Eris Gravity-2 Hyperbola-2 Irtysh Kuaizhou 21 31 Long March 9 10 Miura 5 MLV Neutron New Glenn New Line 1 OS-M 2 4 Orbex Prime Pallas-1 Red Dwarf SLS Block 1B Block 2 Soyuz-7 Terran R VLM Vega E Zero Zhuque 3 Zuljanah
Retired	Antares 110 120 130^† 230 230+ Ariane 1 2 3 4 5 ASLV Athena I II Atlas B D E/F G H I II III LV-3B SLV-3 Able^† Agena Centaur Black Arrow Conestoga^† Delta A B C D E G J L M N 0100 1000 2000 3000 4000 5000 II III IV Diamant Dnepr Energia Europa I^† II^† Falcon 1 Falcon 9 v1.0 v1.1 v1.2 "Full Thrust" Feng Bao 1 GSLV Mk I H-I H-II H-IIB Juno I Juno II Kaituozhe-1 Kosmos original 1 2/2I 3 3M Lambda 4S LauncherOne Long March 1 1D^† 2A 2E 3 3B 4A Mu 4S 3C 3H 3S 3SII V N1^† N-I N-II Naro-1 Paektusan^† Pilot-2^† R-7 Luna Molniya M L Polyot Soyuz original FG L M U U2 Soyuz/Vostok Sputnik Voskhod Vostok L K 2 2M R-29 Shtil' Volna^† Rocket 3 Safir 1 1A 1B Saturn I IB V Scout X-1 Blue Scout II^† X-2^† X-2M X-3 X-3M X-4 X-2B^† B A B-1 D-1 A-1 E-1 F-1 G-1 Shavit original 1 SLV Space Shuttle SPARK^† Sparta SS-520 Start-1 Terran 1^† Thor Able Ablestar 1 2 Agena A B D Burner 1 2 Delta DSV-2U Thorad-Agena SLV-2G SLV-2H Titan II GLV IIIA IIIB IIIC IIID IIIE 34D 23G CT-3 IV Tsyklon R-36-O original 2 3 Universal Rocket UR-500 Proton Proton-K Rokot Strela Vanguard VLS-1^† Zenit 2 2M 2FG Zhuque 1^†
Classes	Sounding rocket Small-lift launch vehicle Medium-lift launch vehicle Heavy-lift launch vehicle Super heavy-lift launch vehicle
This Template lists historical, current, and future space rockets that at least once attempted (but not necessarily succeeded in) an orbital launch or that are planned to attempt such a launch in the future Symbol ^† indicates past or current rockets that attempted orbital launches but never succeeded (never did or has yet to perform a successful orbital launch)

Launches

See also

References