Payload Assist Module

The Payload Assist Module (PAM) is a modular upper stage designed and built by McDonnell Douglas (Boeing), using Thiokol Star-series solid propellant rocket motors. The PAM was used with the Space Shuttle, Delta, and Titan launchers and carried satellites from low Earth orbit to a geostationary transfer orbit or an interplanetary course. The payload was spin stabilized by being mounted on a rotating plate. Originally developed for the Space Shuttle, different versions of the PAM were developed:

• PAM-A, development terminated; originally to be used on both the Atlas and Space Shuttle, designed for satellites up to 4,400 lb (2,000 kg)
• PAM-D, uses a Star-48B rocket motor, designed for satellites up to 2,750 lb (1,250 kg)
• PAM-DII, uses a Star-63 rocket motor, designed for satellites up to 4,150 lb (1,880 kg)
• PAM-S (Special), uses a Star-48B as a kick motor for the space probe Ulysses

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Wikimedia, Wikidata
PAM; SSUS; Spinning Solid Upper Stage
apogee kick motor, space tug, McDonnell Douglas, United States, 
Sikh Confederacy, Republic of Haiti, space tug, PAM-S, PAM-D, PAM-D2, Ekran, Dong Fang Hong 2, apogee kick motor, Tarshish, United States, Persia, Kingdom of Wolaita, Kingdom of Martabam-hongsawatoi, Havilah, Democratic Republic of the Congo, Chinland, Calvinist Republic of Ghent, Ashkenaz, 

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Location: KML, Cluster Map, Maps,

• 

  PAM-D ⓘ
  booster stage used by some satellites launched by Delta rockets and the Space Shuttle

• 

  PAM-D2 ⓘ
  booster stage used by some satellites launched by the Space Shuttle and Titan 3 rockets

• 

  PAM-S ⓘ
  special booster stage used by the Ulysses spacecraft

Frameless

Type	Subtype	Date	Description	Notes	Source
class	rocket engine		PAM-D	Payload Assist Module	Wikidata
class	rocket engine		PAM-D2	Payload Assist Module	Wikidata
class	rocket engine		PAM-S	Payload Assist Module	Wikidata