“Stealth” Destroyer Plagued With Setbacks

USS Zumwalt (DDG-1000) Zumwalt-class destroyer, a sister ship of USS Michael Monsoor (DDG-1001)

Some costly mistakes made in the design of the U.S. Navy’s Michael Monsoor destroyer, part of the Zumwalt class, have forced the ship back to its home base at Bath Iron Works in Maine.

Its problems are fundamental ones that have proven both costly and frustrating for the U.S. Navy.

Although the destroyer was able to complete its acceptance trials in February 2018, damage occurred to its combine blades during this testing phase. Consequently, two of the MT30 marine gas turbine engines must be replaced.

It was during a borescope inspection, in which an optical device is inserted inside the engines, that these problems were revealed.

Christening of Michael Monsoor on 18 June 2016
Christening of Michael Monsoor on 18 June 2016

Additionally, although the Monsoor was heralded as a new class of ship, it became clear that its ammunition was too costly to fire. The Zumwalt class of destroyers were designed to almost silently approach enemy shores and be able to bombard targets as far as 83 miles away. But its custom-made artillery proved to be prohibitively expensive. Each round of ammo came in at a cost from $50,000 (U.S.) to $800,000 (U.S.).

Instead, the Navy hoped the ship could use “the Excalibur precision-guided artillery round(s) originally designed for land forces.”

An F-35 Lightning II completes a fly over of USS Zumwalt (DDG 1000)
An F-35 Lightning II completes a fly over of USS Zumwalt (DDG 1000)

However, the price tag for that ammunition came in at approximately $250 million, so yet again the Navy rejected the idea. It is currently reviewing the option of using the new Hyper Velocity Projectile (HVP), designed for the Army’s 155-millimeter Howitzers, and the Navy’s 127-millimeter deck guns.

The Navy did know about these issues even though it accepted “partial delivery” of the ships in April 2018. Rear Admiral William Galinis told USNI News, “regrettably, coming off her acceptance trials we found a problem with one of the main turbine engines that drives one of the main generators; we’re working very closely with Bath Iron Works, with Rolls-Royce, to get the engine changed before she leaves Bath later this fall and sails to San Diego to start her combat system activation availability next year.”

Later, Galinis added, “After the sea trial…we found it was best to change that turbine out before we actually transited the ship to San Diego.”

Zumwalt-class destroyer
Zumwalt-class destroyer

Originally, all with the stealth destroyer was not doom and gloom. A rigorous set of tests set out by the Navy’s Board of Inspection & Survey (INSURV) were passed perfectly by the Michael Monsoor. Its propulsion system, damage control mechanisms, navigation system, communications and more were found to be first rate.

But the changes do need to be made, and they do not come cheaply. Rolls-Royce engines cost a hefty $20 million (U.S.) to replace. Furthermore, these latest difficulties are not the first to hamper the stealth destroyer. In the past, the ship had electrical system problems, back when it was first tested in December 2017.

Features of the Zumwalt-class destroyer
Features of the Zumwalt-class destroyer

The destroyer is named for Michael A. Monsoor, a U.S. Navy Seal who sacrificed his life in Iraq in 2006 by hurtling himself on an enemy grenade.

Though the destroyer was originally hoped to be part of a 32-ship fleet, that number has fallen to three. Costs for just three of the destroyers are coming in at $23 billion; by comparison, the USS Gerald Ford, considered a first-rate aircraft carrier, cost 50% less.

Read another story from us: Wacko: The US Navy Destroyer That Sank A Japanese Submarine – With The Aid of Potatoes

The future role of the Zumwalt class destroyers remains a question mark. Initially, the Navy hoped the Michael Monsoor would aid Marines in amphibious landings.  Now, the thinking is that it might better serve as an aid to sea-based missions. Whatever the Navy decides, it hopes the Michael Monsoor proves worthy of its enormous price tag.

David Baker

David Baker is one of the authors writing for WAR HISTORY ONLINE