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The Avangard (Russian: Авангард, "Vanguard"; previously known as Objekt 4202, Yu-71 and Yu-74) is a Russian hypersonic glide vehicle (HGV). It can be carried as a multiple independently targetable reentry vehicle (MIRV) payload of heavy intercontinental ballistic missiles (ICBMs), such as the UR-100UTTKh, [6] [7] R-36M2 and RS-28 Sarmat.
Scramjet engines function only when the glide vehicle reaches mach 4.5. These engines are disengaged as the HGV enters the terminal phase of its flight. Failure to deactivate the engines would cause a catastrophic build up of heat in the vehicle as the atmosphere becomes denser during reentry, prematurely destroying the vehicle.
SWERVE started in the 1970s and culminated with a successful flight test in 1985, which demonstrated a sophisticated maneuvering reentry vehicle technology [2] and paved the way for the Advanced Hypersonic Weapon program's Alternate Re-Entry System in the early 2010s, [3] which was later developed into the Common-Hypersonic Glide Body ...
Hypersonic Technology Vehicle HTV-2 reentry (artist's impression) Hypersonic Technology Vehicle 2 (HTV-2) is an experimental hypersonic glide vehicle developed as part of the DARPA Falcon Project designed to fly in the Mach 20 range.
Illustration of Hypersonic Test Vehicle (HTV) 2 reentry phase. The DARPA FALCON Project (Force Application and Launch from Continental United States) was a two-part joint project between the Defense Advanced Research Projects Agency (DARPA) and the United States Air Force (USAF) and is part of Prompt Global Strike. [1]
The new Fattah missile appears to be more of an Iskander-style weapon—a ballistic missile with a partially maneuverable reentry vehicle—rather than a hypersonic glide vehicle weapon.
4. About 180 seconds after launch, the third-stage thrust terminates and the post-boost vehicle (D) separates from the rocket. 5. The post-boost vehicle maneuvers itself and prepares for re-entry vehicle (RV) deployment. 6. While the post-boost vehicle backs away, the RVs, decoys, and chaff are deployed (this may occur during ascent). 7.
The underlying aerodynamic concepts have been used to produce maneuverable reentry vehicles (MARV), to increase the accuracy of some missiles like the Pershing II. More recently, the concepts have been used to produce hypersonic glide vehicles (HGV) to avoid interception as in the case of the Avangard.