Launch of the first Delta G with Biosatellite 1
FunctionExpendable launch system
Country of originUnited States
Launch history
Launch sitesCape Canaveral LC-17
Total launches2
First flight14 December 1966
Last flight7 September 1967

The Delta G, or Thor-Delta G was an American expendable launch system used to launch two biological research satellites in 1966 and 1967. It was a member of the Delta family of rockets.

The Delta G was a two-stage derivative of the Delta E. The first stage was a Thor missile in the DSV-2C configuration and the second stage was a Delta E. Three Castor-1 solid rocket boosters were clustered around the first stage. The solid-fuel upper stage used on the Delta E was not used on the Delta G.

Both launches occurred from Cape Canaveral Air Force Station Launch Complex 17. The first was from pad 17A on 14 December 1966 at 19:20 GMT, with Biosatellite 1. At 22:04 on 7 September 1967, Biosatellite 2 was launched from pad B on the second Delta G.[1][2]


  1. ^ Wade, Mark. "Delta". Archived from the original on 2008-07-24.
  2. ^ Krebs, Gunter. "Thor Family". Gunter's Space Page. Archived from the original on 2007-08-06. Retrieved 2021-12-21.