Encyclopedia Astronautica
Scout X-2



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Scout
Credit: © Mark Wade
American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 1D + 1 x Castor + 1 x Antares 2 + 1 x Altair

LEO Payload: 76 kg (167 lb) to a 185 km orbit. Failures: 1. First Fail Date: 1962-04-26. Last Fail Date: 1962-04-26 in 1985 dollars. Flyaway Unit Cost $: 8.910 million.

Stage Data - Scout X-2

  • Stage 1. 1 x Algol 1. Gross Mass: 10,705 kg (23,600 lb). Empty Mass: 1,900 kg (4,100 lb). Thrust (vac): 470.934 kN (105,870 lbf). Isp: 236 sec. Burn time: 40 sec. Isp(sl): 214 sec. Diameter: 1.01 m (3.31 ft). Span: 1.01 m (3.31 ft). Length: 9.12 m (29.92 ft). Propellants: Solid. No Engines: 1. Engine: Algol 1. Other designations: Senior. Status: Out of Production. This rocket started as a Polaris test motor with a 40 inch diameter, which at the time was the largest solid motor ever tested. It had a nominal performance rating of 45 seconds duration and 45,000 kgf thrust. Variations included Algol I, I-D, II, II-A, II-B and possibly others. Another popular rating was 40KS-115,000 (52,000 kgf for 40 seconds), also known as Senior.
  • Stage 2. 1 x Castor 1. Gross Mass: 3,852 kg (8,492 lb). Empty Mass: 535 kg (1,179 lb). Thrust (vac): 286.001 kN (64,296 lbf). Isp: 247 sec. Burn time: 27 sec. Isp(sl): 232 sec. Diameter: 0.79 m (2.59 ft). Span: 0.79 m (2.59 ft). Length: 5.92 m (19.42 ft). Propellants: Solid. No Engines: 1. Engine: M33-20-4. Status: Out of Production.
  • Stage 3. 1 x Antares 2. Gross Mass: 1,400 kg (3,000 lb). Empty Mass: 300 kg (660 lb). Thrust (vac): 93.094 kN (20,928 lbf). Isp: 293 sec. Burn time: 36 sec. Isp(sl): 233 sec. Diameter: 0.78 m (2.55 ft). Span: 0.78 m (2.55 ft). Length: 2.90 m (9.50 ft). Propellants: Solid. No Engines: 1. Engine: X-259. Status: Out of Production.
  • Stage 4. 1 x Altair 1A. Gross Mass: 390 kg (850 lb). Empty Mass: 181 kg (399 lb). Thrust (vac): 13.788 kN (3,100 lbf). Isp: 255 sec. Burn time: 40 sec. Isp(sl): 232 sec. Diameter: 0.46 m (1.50 ft). Span: 0.46 m (1.50 ft). Length: 2.50 m (8.20 ft). Propellants: Solid. No Engines: 1. Engine: X-248A. Status: Out of Production.

Gross mass: 16,440 kg (36,240 lb).
Payload: 76 kg (167 lb).
Height: 25.00 m (82.00 ft).
Diameter: 1.01 m (3.31 ft).
Thrust: 427.10 kN (96,016 lbf).
Apogee: 185 km (114 mi).
First Launch: 1962.03.29.
Last Launch: 1962.04.26.
Number: 2 .

More... - Chronology...


Associated Countries
Associated Spacecraft
  • GRAB American military naval signals reconnaisance satellite. 9 launches, 1960.04.13 (Dummy subsatellite) to 1965.03.09 (Solrad 7B). GRAB, the first US electronic intelligence (ELINT) satellite, was not declassified until June 1998. More...
  • Program 35 American earth weather satellite. 5 launches, 1962.05.24 (P 35-1) to 1963.09.27 (P 35-1). First US weather satellite, classified for many years. Predecessor to the DMSP series of military satellites. More...

Associated Engines
  • Algol 1 Aerojet solid rocket engine. 470.9 kN. Isp=236s. This rocket started as a Polaris test motor with a 40 inch diameter, which at the time was the largest solid motor ever tested. First flight 1960. More...
  • M33-20-4 Thiokol solid rocket engine. 286 kN. Isp=247s. Used as apogee kick motor on Delta D, LT Thor Agena D, Scout X-1, Scout X-2, Scout X-3, Scout X-4, TA Thor Agena B, TA Thor Agena D. First flight 1960. More...
  • X-248A Thiokol solid rocket engine. 13.8 kN. Isp=255s. Used on Scout X-1, Scout X-2, Scout X-3. First flight 1960. More...
  • X-259 Thiokol solid rocket engine. 93.1 kN. Isp=293s. Used on Scout A, Scout B, Scout D, Scout F, Scout X-2, Scout X-3, Scout X-4. First flight 1962. More...

See also
  • Scout Solid-fuel, light payload, lower-cost launch vehicle developed by the Air Force and NASA in the late 1950's and used in a variety of configurations over thirty years. Launched from Cape Canaveral, Vandenberg, Wallops Island, and from Italy's equatorial San Marco platform off Kenya. Italy studied but did not develop subsequent upgraded versions. More...

Associated Manufacturers and Agencies
  • Vought American manufacturer of rockets and spacecraft. Vought, USA. More...

Associated Launch Sites
  • Wallops Island Small NASA launch site for sounding rocket launches and occasional Scout launches to orbit. Air launches are conducted from the Drop Zone Wallops Island, 37.00 N 72.0 W. With the last orbital launch in 1985 and the decline in sounding rocket launches, Wallops fell into near-disuse as a launch center. Its fortunes revised with the establishment of Mid-Atlantic Regional Spaceport in 2005 and orbital launches resumed in 2010. More...
  • Vandenberg Vandenberg Air Force Base is located on the Central Coast of California about 240 km northwest of Los Angeles. It is used for launches of unmanned government and commercial satellites into polar orbit and intercontinental ballistic missile test launches toward the Kwajalein Atoll. More...
  • Vandenberg SLC5 Scout launch complex. Dedicated Scout launch pad, used during the life of that vehicle from 1962 to 1994. More...

Associated Stages
  • Algol 1D Solid rocket stage. 440.00 kN (98,916 lbf) thrust. Mass 10,700 kg (23,589 lb). More...
  • Altair 1 Solid propellant rocket stage. Loaded/empty mass 238/30 kg. Thrust 12.45 kN. Vacuum specific impulse 256 seconds. More...
  • Antares 2 Solid propellant rocket stage. Loaded/empty mass 1,400/300 kg. Thrust 93.09 kN. Vacuum specific impulse 293 seconds. More...
  • Castor 1 Solid propellant rocket stage. Loaded/empty mass 3,852/535 kg. Thrust 286.00 kN. Vacuum specific impulse 247 seconds. More...

Scout X-2 Chronology


1962 March 29 - . 07:27 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island LA3. LV Family: Scout. Launch Vehicle: Scout X-2. LV Configuration: Scout X-2-1C ST-9.
  • P-21A Plasma / aeronomy mission - . Nation: USA. Agency: NASA. Apogee: 6,291 km (3,909 mi).

1962 April 26 - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC5. LV Family: Scout. Launch Vehicle: Scout X-2. LV Configuration: Scout X-2 S111. FAILURE: Failure.. Failed Stage: U.
  • Solrad 4B - . Payload: GRAB 4B. Mass: 91 kg (200 lb). Nation: USA. Agency: USN. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: GRAB. Decay Date: 1962-04-26 . COSPAR: F620426A. Summary: Solar radiation monitor..

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