Solid rocket booster
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A solid rocket booster is a solid propellant motor used to provide thrust in spacecraft launches from initial launch through the first ascent. Many launch vehicles, including the Atlas V, Space Launch
SLS's solid rocket boosters
Delta II with nine solid rocket boosters
Graphite-Epoxy Motor
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The Graphite-Epoxy Motor is a family of solid rocket boosters developed in the late 1980s and first flown in 1990. The motors use casings made from carbon-fiber-reinforced polymer and a propellant con
Solid rocket booster
…Some launchers use a variable number of boosters depending on payload and target orbit: Atlas V: zero, 1, 2, 3, 4, or 5 (GEM-63) Delta II: Often launched with 9 SRBs, but sometimes fewer…
A Vulcan Centaur in VC2 configuration with 2 GEM 63XL boosters.
A GEM 40 is hoisted for attachment to a Delta II
A GEM 60 being prepared for integration onto a Delta IV
A GEM 46 motor prior to mating to a Delta II 7925H