Boeing's Delta IV Heavy Gets Ready for its Close-Up

Posted on: Dec. 6th, 2004 || Source: space.com | E-mail Article | Print Article

The upcoming demonstration of Boeing’s heavy-lift Delta 4 rocket will feature a booster-separation event soon after liftoff and a long-duration main-engine burn during which the thrust will be throttled up, down and back up again.

Those are the major differences between the flight profile of the heavy-lift Delta 4 and the standard variant, said Dan Collins, vice president of Boeing Expendable Launch Systems of Huntington Beach, Calif. The heavy-lift vehicle, with three core stages in a side-by-side configuration, is designed to loft up to 13,000 kilograms to geosynchronous-transfer orbit, twice the capacity of its single-core cousin.

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