Encyclopedia Astronautica
Scout X-4A


American all-solid orbital launch vehicle. Five stage vehicle consisting of 1 x Algol 2A + 1 x Castor + 1 x Antares 2 + 1 x Altair 2 + 1 x Cetus

Gross mass: 17,500 kg (38,500 lb).
Height: 22.00 m (72.00 ft).
Diameter: 1.02 m (3.34 ft).
Thrust: 380.00 kN (85,420 lbf).
Apogee: 180 km (110 mi).
First Launch: 1964.08.18.
Last Launch: 1966.02.10.
Number: 2 .

More... - Chronology...


Associated Countries
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...

Associated Stages
  • Algol 2 Solid propellant rocket stage. Loaded/empty mass 11,600/1,650 kg. Thrust 564.25 kN. Vacuum specific impulse 255 seconds. More...
  • Altair 2 Solid propellant rocket stage. Loaded/empty mass 275/37 kg. Thrust 22.24 kN. Vacuum specific impulse 266 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-4A Chronology


1964 August 18 - . 06:05 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island LA3. LV Family: Scout. Launch Vehicle: Scout X-4A. LV Configuration: Scout X-4A S129R.
  • Reentry 4A - . Nation: USA. Agency: NASA. Apogee: 183 km (113 mi). Summary: Scout launch tested Apollo-type ablator materials at lunar reentry heating levels..

1966 February 10 - . 00:55 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island LA3A. LV Family: Scout. Launch Vehicle: Scout X-4A. LV Configuration: Scout X-4A S141C.
  • Reentry 4B Re-entry vehicle test - . Nation: USA. Agency: NASA. Apogee: 175 km (108 mi).

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