Military vehicles carrying the DF-17 hypersonic ballistic missile roll past Tiananmen Square during a military parade marking the 70th anniversary of the founding of the People's Republic of China, in Beijing in 2019. It now boasts a new model, the DF-27. File Photo by Roman Pilipey/EPA-EFE
May 25 (UPI) -- China's newest hypersonic missile, the DF-27, can fly as far as Hawaii, penetrate U.S. missile defenses and pose a particular threat to U.S. aircraft carriers, according to news reports of an assessment from the Pentagon.
Chinese researchers claimed in a May research journal report that the country's hypersonic missiles could destroy a U.S. carrier group "with certainty." This capability threatens to sideline U.S. aircraft carrier groups in the Pacific, potentially shifting the strategic balance of power and leaving the United States with limited options for assisting Taiwan in the event China invades.
This shift in the balance of power highlights how the next-generation hypersonic missiles that China, Russia and the United States are developing pose a significant threat to global security. I am an aerospace engineer who studies space and defense systems, including hypersonic systems. These new systems pose an important challenge due to their maneuverability all along their trajectory. Because their flight paths can change as they travel, defending against these missiles requires tracking them throughout their flight.
A second important challenge stems from the fact that they operate in a different region of the atmosphere from other existing threats. The new hypersonic weapons fly much higher than slower subsonic missiles but much lower than intercontinental ballistic missiles. The United States and its allies do not have good tracking coverage for this in-between region, nor do Russia or China.
Russia has claimed that some of its hypersonic weapons can carry a nuclear warhead. This statement alone is a cause for concern whether or not it is true. If Russia ever operates this system against an enemy, that country would have to decide the probability of the weapon being conventional or nuclear.
In the case of the United States, if the determination were made that the weapon was nuclear, then there is a very high likelihood that the United States would consider this a first strike attack and respond by unloading its nuclear weapons on Russia. The hypersonic speed of these weapons increases the precariousness of the situation because the time for any last-minute diplomatic resolution would be severely reduced.
It is the destabilizing influence that modern hypersonic missiles represent that is perhaps the greatest risk they pose. I believe the United States and its allies should rapidly field their own hypersonic weapons to bring other nations such as Russia and China to the negotiating table to develop a diplomatic approach to managing these weapons.
What is hypersonic?
Describing a vehicle as hypersonic means that it flies much faster than the speed of sound, which is 761 mph at sea level and 663 mph at 35,000 feet, where passenger jets fly. Passenger jets travel at just under 600 mph, whereas hypersonic systems operate at speeds of 3,500 mph -- about 1 mile per second -- and higher.
Hypersonic systems have been in use for decades. When John Glenn came back to Earth in 1962 from the first U.S. crewed flight around the Earth, his capsule entered the atmosphere at hypersonic speed. All of the intercontinental ballistic missiles in the world's nuclear arsenals are hypersonic, reaching about 15,000 mph, or about 4 miles per second at their maximum velocity.
Intercontinental ballistic missiles are launched on large rockets and then fly on a predictable trajectory that takes them out of the atmosphere into space and then back into the atmosphere again. The new generation of hypersonic missiles fly very fast, but not as fast as ICBMs. They are launched on smaller rockets that keep them within the upper reaches of the atmosphere.
3 types of hypersonic missiles
There are three different types of non-ICBM hypersonic weapons: aero-ballistic, glide vehicles and cruise missiles. A hypersonic aero-ballistic system is dropped from an aircraft, accelerated to hypersonic speed using a rocket and then follows a ballistic, meaning unpowered, trajectory. The system Russian forces have been using to attack Ukraine, the Kinzhal, is an aero-ballistic missile. The technology has been around since about 1980.
China and the United States are investing heavily in developing hypersonic missiles.
A hypersonic glide vehicle is boosted on a rocket to high altitude and then glides to its target, maneuvering along the way. Examples of hypersonic glide vehicles include China's Dongfeng-17, Russia's Avangard and the U.S. Navy's Conventional Prompt Strike system. U.S. officials have expressed concern that China's hypersonic glide vehicle technology is further advanced than the U.S. system.
A hypersonic cruise missile is boosted by a rocket to hypersonic speed and then uses an air-breathing engine called a scramjet to sustain that speed. Because they ingest air into their engines, hypersonic cruise missiles require smaller launch rockets than hypersonic glide vehicles, which means they can cost less and be launched from more places. Hypersonic cruise missiles are under development by China and the United States. The United States reportedly conducted a test flight of a scramjet hypersonic missile in March 2020.
The primary reason nations are developing these next-generation hypersonic weapons is how difficult they are to defend against due to their speed, maneuverability and flight path. The United States is starting to develop a layered approach to defending against hypersonic weapons that includes a constellation of sensors in space and close cooperation with key allies
With all of this activity on hypersonic weapons and defending against them, it is important to assess the threat they pose to national security. Hypersonic missiles with conventional, non-nuclear warheads are primarily useful against high-value targets, such as an aircraft carrier. Being able to take out such a target could have a significant impact on the outcome of a major conflict.
However, hypersonic missiles are expensive and therefore not likely to be produced in large quantities. As seen in the recent use by Russia, hypersonic weapons are not necessarily a silver bullet that ends a conflict.
Iain Boyd is director of the Center for National Security Initiatives and a professor of Aerospace Engineering Sciences at the University of Colorado Boulder.
This article is republished from The Conversation under a Creative Commons license. Read the original article.
The views and opinions expressed in this commentary are solely those of the author.