luritie

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Award for National University of Defense Technology for their contribution in achieving stable transient combustion of scramjet engine during change (speed, altitude, direction,) in flight conditions.
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3 years ago, ground test
China’s hypersonic cruise missile sees technological breakthrough: reports
Source:Global Times Published: 2020/6/8
A top Chinese science institute recently made record-breaking progress in a scramjet program which Chinese media speculate could lead to significant advances in the development of China's hypersonic cruise missile, another type of hypersonic weapon that is more powerful than China's DF-17 hypersonic glide-boost missile.

A team led by Fan Xuejun at the Institute of Mechanics under the Chinese Academy of Sciences has developed a type of scramjet that ran continuously for 600 seconds in a ground test, Weihutang, a program on military affairs affiliated with state broadcaster China Central Television (CCTV), reported on over the weekend. This broke the world record of 210 seconds set by the US' X-51 aircraft, Weihutang said.

A powerful scramjet, also known as supersonic combustion ramjet, is crucial for a hypersonic cruise missile to reach hypersonic speed, but developing one is highly challenging due to issues with heat resistant materials and cooling of the engine, the report said. Hypersonic weapons are known for their high speeds and unpredictable trajectories, which render most of the current generation of air defense systems useless against them.

China unveiled its DF-17 missile for the first time at the National Day military parade on October 1, 2019. This type of missile was widely believed by military observers to be a hypersonic weapon due to its aerodynamic design. Weihutang said that the DF-17 is a type of hypersonic glide-boost missile, meaning that it is propelled into the sky via a rocket and glides in the air using shock waves generated by its own hypersonic flight, but the other type of hypersonic weapon, the hypersonic cruise missile, has constant thrust thanks to the scramjet, which gives it a longer range and even more unpredictable trajectory.

The DF-17 is a short to medium-range missile, and using a scramjet can potentially extend its range by at least five times, allowing it to become intercontinental, Shanghai-based news website eastday.com reported on Friday, citing estimations by experts. Since a hypersonic cruise missile does not require a rocket as large as the one used by a glide-boost missile, its size and weight are smaller, allowing it to be stealthier, the eastday.com report said.
 
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Ground test, in a tunnel, isn't the same as an actual flight test.
 
Award for actual flight test. Ground test, 3 years ago
"ran continuously for 600 seconds in a ground test, Weihutang, a program on military affairs affiliated with state broadcaster China Central Television (CCTV), reported on over the weekend. This broke the world record of 210 seconds set by the US' X-51 aircraft, Weihutang said."

They didn't say anything about how long any flight test may have lasted.
 
Pity they don’t seem to mention what fuel was used. How would this system differ from the Starry Sky test vehicle?
 
China extends DF-100 supersonic missile range to 4,000 km for strategic strikes.

"On November 17, 2024, the Chinese account C Major provided updated data on China’s Dongfeng-100 (DF-100) supersonic cruise missile, also known as the Changjian-100 (CJ-100). The missile is a land-based system with a range reportedly between 3,000 and 4,000 kilometers and a sustained flight speed of Mach 4. It is designed for precision strikes and features capabilities aimed at targeting various types of installations and structures.

The DF-100 was publicly introduced during China’s 70th National Day parade on October 1, 2019. At that time, its range was reported to be 2,000 to 3,000 kilometers, with a speed between Mach 4 and Mach 5. The system is capable of engaging targets such as land-based facilities, reinforced structures, underground bunkers, and large naval vessels. It can be deployed in pairs on a 10x10 transporter erector launcher (TEL) vehicle and has the potential to be launched from the H-6K bomber. New information suggests an improved range of up to 4,000 kilometers while maintaining a consistent speed of Mach 4.

The DF-100 operates at supersonic speeds for most of its flight and follows a trajectory that takes it into altitudes of over 30 kilometers. This flight profile minimizes atmospheric drag but increases exposure to radar detection. Its guidance system includes inertial navigation, terrain matching, scene matching, and satellite positioning, providing high accuracy. This combination allows the missile to strike both fixed and moving targets, including slow-moving naval vessels.

Specifications for the DF-100 include a length exceeding 9 meters, a projectile diameter ranging between 0.7 and 1 meter, and a payload capacity of over 500 kilograms. The missile is powered by a ramjet engine and achieves speeds of Mach 5 during its terminal phase. Its three-stage operation includes an initial boost phase using a solid rocket motor, a cruise phase at altitudes of 30 to 40 kilometers, and a terminal glide phase. The glide phase involves high-speed maneuvering, enhancing its ability to evade defenses and strike moving targets."

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