Zumwalt hypersonic upgrade runs into a wider program problem
The U.S. Navy’s plan to turn its three Zumwalt-class destroyers into hypersonic strike platforms has fallen two years behind schedule, according to a report cited by Defense News. The delay affects one of the military’s highest-profile efforts to field the Conventional Prompt Strike, or CPS, missile at sea, and it underscores how the project is being squeezed by problems on both sides of the integration effort: the ships themselves and the missile program they are meant to carry.
Government auditors said the schedule slip is tied to a combination of rising costs, reliability issues, production problems, and weak coordination between the Navy and Army on the joint CPS effort. The result is not just a slower ship modification timeline. Flight testing that had been scheduled for 2025 has now been pushed to 2027, moving a key validation milestone further into the future.
For a program meant to give the Navy a fast, long-range conventional strike option, the setback is more than a simple procurement delay. It raises questions about whether the service can efficiently retrofit a class of ships that has already struggled to find a stable operational role.
Why the Zumwalts matter
The Zumwalt program has long been one of the Navy’s most debated surface-ship efforts. Originally envisioned as a 32-ship class, it was cut to just three after costs climbed and concerns emerged over mission fit and capability. In 2022, the Navy selected the destroyers as one of the platforms for the CPS boost-glide hypersonic weapon, effectively giving the ships a new mission centered on long-range strike.
CPS is designed to use a two-stage booster to launch a high-altitude glider capable of hitting targets thousands of miles away in 30 minutes or less. That concept fits the Navy’s broader push to field prompt conventional strike options that could hold high-value targets at risk without using nuclear weapons.
On paper, arming the Zumwalts with CPS helps solve two problems at once: it gives the Navy a path to deploy a hypersonic weapon at sea, and it gives the expensive destroyers a clearer strategic purpose. In practice, the integration has proven technically and programmatically difficult.
Ship modifications are proving more complex than planned
The GAO findings cited by Defense News point to a range of complications in adapting the DDG-1000-class ships. Installing hypersonic missiles and their launch tubes is not a plug-and-play change. It requires deep modifications to vessels that already use unique systems and have been expensive to maintain.
One example from the report illustrates the challenge. A ship needed more cabling than originally anticipated because contractors removed more cable than planned from the forward part of the ship during launch-tube installation work. That kind of redesign and rework can create ripple effects across cost, schedule, and technical verification.
The auditors also flagged the class’s existing sustainment burden. The Zumwalts use distinct radar, combat, and network systems that the GAO said are costly and difficult to sustain and maintain. The ships have also suffered from unreliable power systems and spare-parts challenges. Those underlying issues do not disappear when a new weapons package is added; they compound the complexity of the upgrade.
The missile program has its own bottlenecks
The delay is not only about shipyard integration. The missile itself is also under pressure. While the source text notes recent successes in CPS testing from land facilities, the GAO said production faces significant problems, particularly at the industrial level.
According to the report, Lockheed Martin, identified as the CPS missile body prime contractor responsible for production integration, faces challenges that could prevent the program from reaching planned output and cost targets. The issues include heat-resistant coating problems, substandard parts, and insufficient production capacity.
The production shortfall is stark. The source says the factory is currently capable of turning out only six or seven missiles a year, versus a desired rate of 12. That matters because even if ship integration proceeds, operational deployment depends on a reliable stream of missiles that can be produced at scale and at predictable cost.
Costs have also moved sharply in the wrong direction. A 2020 Navy estimate projected $31 billion for 262 missiles. That has since grown to $41 billion for 224 missiles, according to the cited GAO figures. In other words, the program is getting more expensive while delivering fewer missiles than originally estimated.
A joint Army-Navy effort is showing coordination strain
CPS is not a Navy-only program. The Navy’s ship- and submarine-launched version shares lineage with the Army’s land-based Long-Range Hypersonic Weapon. That kind of joint approach is often intended to spread development costs and accelerate fielding through common components. But it also creates dependencies across services.
The report says the Navy and Army are reportedly not coordinating work on the joint program effectively. In a system this technically demanding, poor coordination can translate directly into schedule instability, duplicated effort, and mismatched assumptions about testing, production, and deployment sequencing.
That matters beyond the Zumwalt class. The same missile family is also planned for Virginia-class attack submarines. Problems in production, testing, or joint governance could therefore affect more than a single ship modernization effort.
What the delay means strategically
The two-year slip does not end the Navy’s hypersonic ambitions, but it does show how difficult it is to field advanced weapons on unconventional platforms while the weapons are still maturing. Hypersonic systems promise speed, range, and reduced response time, but those advantages depend on a supply chain, test cadence, and host platform that can all support deployment on schedule.
For the Navy, the Zumwalt case is especially sensitive because the destroyers have already absorbed years of scrutiny over cost and mission relevance. A successful CPS fielding effort could have reframed the class as a specialized strategic asset. Continued delay does the opposite: it reinforces the view that the ships remain operationally valuable in theory but persistently difficult in practice.
The schedule shift from 2025 to 2027 for flight testing is therefore significant not only as a milestone delay, but as a signal that the integration challenge is still not under control. Until the Navy can show reliable ship modifications, dependable missile production, and better joint coordination, the path to an operational sea-based hypersonic capability will remain uncertain.
Key takeaways
- The Navy’s effort to install CPS hypersonic missiles on Zumwalt destroyers is two years behind schedule.
- GAO cited ship-modification complexity, class reliability problems, production constraints, and weak Navy-Army coordination.
- Missile flight testing previously set for 2025 has been pushed to 2027, delaying a major validation milestone.
This article is based on reporting by Defense News. Read the original article.
Originally published on defensenews.com
