Scout X-1

Launch ofExplorer 9 on a Scout X-1
Function	Expendable launch system Sounding rocket
Manufacturer	Vought
Country of origin	United States
Size
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	WallopsLA-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	1solid
Maximum thrust	471 kN (106,000 lbf)
Specific impulse	236 seconds
Burn time	40 seconds
Propellant	Solid
Second stage –Castor 1A
Powered by	1solid
Maximum thrust	286 kN (64,000 lbf)
Specific impulse	247 seconds
Burn time	27 seconds
Propellant	Solid
Third stage –Antares 1A
Powered by	1X-254
Maximum thrust	60 kN (13,000 lbf)
Specific impulse	256 seconds
Burn time	39 seconds
Propellant	Solid
Fourth stage –Altair 1A
Powered by	1X-248A
Maximum thrust	14 kN (3,100 lbf)
Specific impulse	255 seconds
Burn time	40 seconds
Propellant	Solid
[edit on Wikidata]

Scout X-1 was an Americanexpendable launch system andsounding rocket which was flown seven times between August 1960 and October 1961. Fourorbital and threesuborbital launches were made, with four of the launches resulting in failures.^[1]

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

Several derivatives of the Scout X-1 were also flown. TheUnited States Navy developed theBlue Scout, which was a three-stagesounding rocket, and theBlue Scout II which was almost identical to the Scout X-1. TheScout 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 aNOTS-17 upper stage.

Scout X-1 was flown seven times between August 1960 and October 1961 fromLaunch Area 3 at theWallops 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 theS-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 placedExplorer 9, a reflight of the failed S-56, into Earth orbit, in the first successful orbital launch to be conducted by aScout rocket. The next launch attempt on 30 June 1961 carried theS-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, carryingplasma andaeronomy research payloads on a suborbital trajectory. This launch was successful.^[1][2]

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

• Scout
• Scout X-1A
• Blue Scout I
• Blue Scout II

• 1960 in spaceflight
• 1961 in spaceflight
• Scout (rocket family)

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