Delta G

This article is about the rocket, for the thermodynamic potential, see Gibbs free energy

Delta G

Launch of the first Delta G with Biosatellite 1
Function	Expendable launch system
Country of origin	United States
Launch history
Status	Retired
Launch sites	Cape Canaveral LC-17
Total launches	2
Successes	2
First flight	14 December 1966
Last flight	7 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.