Delta-IV medium rockets use a single CBC, while the heavy version uses three CBCs. The Delta-IV family of rockets is built around a Common Booster Core (CBC). West coast launches are conducted at SLC-6 at Vandenberg Air Force Base. The Delta IV family of rockets was developed as part of the Air Force's Evolved Expendable Launch Vehicle program (EELV).Įast coast launches occur at complex 37B at Cape Canaveral. All Delta III launch attempts occured from launch complex 17B at Cape Canaveral.Īlthough not successful as a satellite launcher, experience with the Delta III's cryogenic upper stage, and the new payload fairing, contributed to the new Delta IV rocket family. Only the third launch, with a dummy payload, was considered successful. Unfortunately, the first two attempts failed. Payload FairingĪ new 4 meter payload fairing, matching the diameter of the new second stage, allowed much more space for payloads. Burning liquid hydrogen and liquid oxygen for fuel, the new second stage was much more powerful than previous Delta II second stages. ![]() The RL10B-2 was developed from the highly reliable RL-10 engine. The Delta III second stage was powered by a cryogenically fueled Pratt & Whitney RL10B-2 rocket engine. Three of the SRMs were capable of thrust-vectoring to provide the rocket with additional directional control. Thrust was supplemented with nine GEM-46 solid rocket motors. The first stage was powered by an RS-27A main engine and two small vernier engines. The Delta III was designed to have a higher payload than existing Delta II rockets. The Delta III, sometimes referred to as the Delta-8930, was developed in the late 1990's. Current versions, known as Delta IV, will be in service for many years to come. ![]() The Delta series of rockets became one of the worlds most reliable satellite launchers. Thor rockets, in the Thor-Agena configuration, were used to launch Corona spy satellites.ĭuring the early 1960's, the Thor launcher evolved into the Delta family of space launchers. Thor and Delta Rockets Thor and Delta Rockets Overviewĭeveloped in the 1950's, the PGM-17 Thor IRBM (Intermediate Range Ballistic Missile) soon became one of Americas most important space launchers. Other Stuff Store Archives Graphics Wallpapers AboutĬontact Information Email Richard Historic Spacecraft Reference Spaceflight Links Shuttle Flights Master Index Timeline Acronyms Quotes Apollo Capsules Commercial Gemini Lunar Module Mercury Military Spacecraft Shenzhou Soyuz Space Shuttle Vostok & VoskhodĪtlas Delta / Thor Jupiter Orbital Redstone Saturn I & IB Saturn 5 SpaceX Titan Upper Stages Other RocketsĬhinese European Indian Japanese Russian V-2 (A-4) Other NationsĪsteroid / Comet Discovery Lunar Missions Outer Planets Mariner Mars Pioneer Telescopes Venus Probes
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