The Delta 2 rocket
SPACEFLIGHT NOW/BOEING FACT SHEET
Posted: June 28, 2002
Boeing manufactures Delta rockets in Huntington Beach, Calif., with final assembly in Pueblo, Colo. The 7425-9.5 is a three-stage launch vehicle has five major assemblies: the first stage, including main engine and four strap-on solid propellant rocket motors; interstage; second stage; third stage; and 9.5-foot diameter payload fairing. The Delta 2 is approximately 126 feet tall and eight feet wide.
Manufactured by Rocketdyne, a division of Boeing, the RS-27A main engine operates on liquid oxygen and RP-1 (kerosene). The RS-27A has a sea-level thrust of 200,000 pounds. Each of the nine Alliant Techsystems solid strap-on motors has a sea-level thrust of 100,270 pounds. The main engine and four solid rocket motors burn at liftoff.
An Aerojet AJ10-118K engine powers the second stage and burns Aerozine-50 fuel and nitrogen tetroxide oxidizer. Ignited at altitude, the engine has a vacuum-rated thrust of 9,815 pounds.
The third stage is Thiokol's Star 48B solid-propellant stage.
The Boeing family of launch vehicles is derived from the Delta family of rockets built and launched since 1960. In that time 290 Deltas have been launched.
Delta 2 rockets can be configured as two- or three-stage vehicles depending on mission requirements. The latest version, the Delta 2 7925 model, can boost 3,965 pounds (1800 kg) to geosynchronous transfer orbit (GTO).
Today, Boeing has a growing list of commercial customers, including Hughes Space and Communications International, Inc., Space Systems/Loral, and Motorola.
To serve its commercial customers, Boeing has agreements with the U.S. Air Force and NASA for the use of two government-owned launch pads at Space Launch Complex 17, Cape Canaveral Air Station, Fla., and one pad at Space Launch Complex 2, Vandenberg Air Force Base, Calif.
Major subcontractors include: Alliant Techsystems, Magna, Utah, graphite epoxy motors for boost assist; Aerojet, Sacramento, Calif., second-stage engine; and L3 Communications Space & Navigation, Teterboro, N.J., Redundant Inertial Flight Control Assembly (RIFCA) provides course and attitude control.
Flight Data File
Vehicle: Delta 2 (7425-9.5)
Launch date: July 1, 2002
Launch time: 2:56:14 a.m. EDT (0656:14 GMT)
Launch site: SLC-17A, Cape Canaveral, Florida
Satellite broadcast: GE-2, Transponder 9, C-band
Launch timeline - Chart with times and descriptions of events to occur during the launch.
Launch windows - See the daily launch opportunities for CONTOUR.
Orbit trace - Maps showing the ground track for the launch.
CONTOUR - Technical look at the spacecraft and its systems.
Science goals - The science of CONTOUR aims at a closer look at comet diversity.
SLC-17 - The launch complex where Delta rockets fly from Cape Canaveral.
Delta manufacturing - Map of where the parts for Delta 2 rockets are made.
Hardware flow - Illustration of how Delta 2s come together at the Cape.
Delta directory - See our coverage of preview Delta rocket flights.
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