Accession Number:

ADA275002

Title:

DD 21A-A Capable, Affordable, Modular 21st Century Destroyer

Descriptive Note:

Final rept.

Corporate Author:

NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD

Report Date:

1993-12-01

Pagination or Media Count:

276.0

Abstract:

Future Navy ships must be superior but inexpensive. A new philosophy and configuration provide the 21st century destroyer, the DD 21A, with global range reduced lightship displacement and cost superior seakeeping no seawater ballast sharper turns and stops and greatly reduced installed power, fuel consumption, and pollution. These benefits result from a new machinery-driven ship design paradigm centered on simplicity and efficiency. All main machinery is modular and outside the watertight hull, freeing midship areas for personnel. The tumble home inward-sloped hull is long and slender, requiring little power at maximum speed. Two removable, prealigned and pretested propulsor modules are attached to the stern after hull construction and are replaceable pierside. Each module includes a steerable pod aligned to the water inflow. A streamlined strut connects each pod rigidly to a vertical steerable barrel. Two removable, power- producing modules are mounted in the helicopter hangar. Each module comprises a 26,400-hp 19.7-MW intercooled, recuperated gas turbine a 4-MW ship service alternator and a 20-MW propulsion alternator. These remarkable results are obtained by taking a reference destroyer from the advanced surface ship evaluation tool data bank and evaluating several progressive changes made to it.

Subject Categories:

  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE