US Navy successfully conducted test of Solid Rocket Motor for future hypersonic missile.

According to information published by the U.S. Navy on May 27, 2021, U.S. Navy Strategic Systems Programs (SSP) successfully conducted a test of the First Stage Solid Rocket Motor (SRM) on May 27th in Promontory, Utah as part of the development of the U.S. Navy’s Conventional Prompt Strike (CPS) offensive hypersonic strike capability and the U.S. Army’s Long Range Hypersonic Weapon (LRHW).
Follow Navy Recognition on Google News at this link

A common hypersonic glide body (C-HGB) launches from Pacific Missile Range Facility during a Defense Department flight experiment, Kauai, Hawaii, March 19, 2020. (Picture source U.S. DoD)

This was the initial live-fire test of the first stage SRM (Solid Rocket Motor) and is a vital step in the development of a Navy-designed common hypersonic missile that will be fielded by both the Navy and Army.

The first stage SRM will be part of a new missile booster for the services and will be combined with a Common Hypersonic Glide Body (CHGB) to create the common hypersonic missile. Each service will use the common hypersonic missile while developing individual weapon systems and launchers tailored for launch from sea or land. This successful SRM test represents a critical milestone leading up to the next Navy and Army joint flight test, which will take place in the first quarter of the Fiscal Year 2022, and ultimately the fielding of the CPS and LRHW weapon systems.

The Department of Defense successfully tested the CHGB on March 20, 2020. The services are working closely with government national laboratories and industry to continue the development and production of the CHGB. The Navy is the lead designer, and the Army leads production.

Information gathered from this and future tests will further inform the services offensive hypersonic technology development. The Department of Defense (DoD) is working in collaboration with industry, government national laboratories, and academia to field hypersonic warfighting capability in the early-to-mid-2020s.

Hypersonic weapons, capable of flying at speeds greater than five times the speed of sound (Mach 5), are highly maneuverable and operate at varying altitudes. In a matter of minutes, Navy and Army warfighters can defeat high-value targets hundreds or even thousands of miles away. Delivering hypersonic weapons is one of the DoD's highest priorities.

The common hypersonic missile design for sea and land-based applications provides economies of scale for future production and relies upon a growing U.S. hypersonics industrial base.