Tag Archives: speed of sound

Are Hypersonic Weapons Hyped Propaganda?

The United States, Russia, and China are developing an array of hypersonic weapons—maneuverable vehicles that carry warheads through the atmosphere at more than five times the speed of sound. The countries and their defense agencies, such as DARPA, claim that these weapons outperform existing missiles in terms of delivery time and evasion of early warning systems. New research, however, shows that these weapons travel intercontinental distances more slowly than comparable ballistic missiles flying depressed trajectories, and that they remain visible to existing space-based
sensors for the majority of flight. Fundamental physical limitations imposed by low-altitude atmospheric flight render hypersonic missiles an evolutionary—not revolutionary— development relative to established ballistic missile technologies.

Misperceptions of hypersonic weapon performance have arisen from social processes by which the organizations developing these weapons construct erroneous technical facts favoring continued investment in such weapons.

Excerpt from from Cameron L. Tracy and David Wright, Modeling the Performance of Hypersonic Boost-Glide Missiles, SCIENCE & GLOBAL SECURITY, 2021

HyperSonic Gliders: Arms Race at the Speed of Sound

Hypersonics are like missiles that travel at over five times the speed of sound, but are able to manoeuvre in mid-flight, making them much harder to track and intercept than traditional projectiles.  France is the fourth of the five permanent UN Security Council members to join the so-called “stealth by speed” contest, after China, Russia and the United States.  “We have decided to issue a contract for a hypersonic glider”–V-MaX (Experimental Manoeuvering Vehicle)–that can travel at over 6,000 kilometres per hour, Defence Minister Florence Parly said last week, promising a test flight by the end of 2021.

In March 2018, Russian President Vladimir Putin stunned Western military analysts – and many in Russia – by unveiling plans for a new arsenal of hypersonic weapons which he said would render missile defence systems obsolete….A few months later US President Donald Trump threatened to walk away from a key arms control treaty with Moscow.

Hypersonic gliders would be carried to the end of the earth’s atmosphere by a launch vehicle and would then “glide” back to a target on the ground. “The goal is high-speed manoeuvrability. That’s how it differs from a ballistic trajectory,” the French government’s defence procurement and technology agency (DGA) said.  “Once the initial speed is reached, we can play with speed and altitude to move up and down, to the left and to the right, creating a trajectory that is more difficult to intercept,” it said…

In December 2018, the Kremlin touted the capabilities of its new hypersonic glider, aptly named “Avanguard”.  The Kremlin said that in tests, the intercontinental projectile reached 27 times the speed of sound – 33,000 kilometres per hour, or Mach 27.  “At this speed, not a single intercepter missile can shoot it down,” Deputy Prime Minister Yury Borisov boasted.  China has also reportedly carried out several successful tests since 2014 of a glider that can reach speeds of between Mach 5 and Mach 10.

Excerpts from Race for ‘hypersonic’ weapons heats up as France joins fray, Agence France Presse, Jan. 29, 2019