Chinese Engine Updates, News & Discussion

100 million CNY is approximately 13.75 million USD, which seems costly and almost twice the price of a WS10B or RD-93MA, or perhaps even higher.

Probably, there is some real advantage inherent within the WS-21 or in this deal.
Since the quantity of this order is only one engine, we can't find out any more information. The information I got is that it is indeed worth 100 million CNY.

However, under normal circumstances, a production WS-21 engine worth 100 million CNY is not that expensive.
There may be some problem with your information. the WS-10B costs about 14~15 million dollars.
 
Since the quantity of this order is only one engine, we can't find out any more information. The information I got is that it is indeed worth 100 million CNY.

However, under normal circumstances, a production WS-21 engine worth 100 million CNY is not that expensive.
There may be some problem with your information. the WS-10B costs about 14~15 million dollars.

You might be more accurate on the WS10B cost. I used AI search to obtain the price, and it provided an estimated range of 3-6 million USD for the RD93MA and 4-8 million USD for the WS10B. Of course, these estimates could be inaccurate. Therefore, I personally give more weight to the price you quoted.
 
Add two additional messages.

1, Pakistan purchased a WS-21 engine last year. I have already mentioned this news before. Now add that the deal is for 100 million CNY in cash.

2, AECC currently has a very high secrecy level group working on a brand new small thrust turbofan engine (not the one that was revealed late last year). ------ This is a bit of an anomaly.

What will Pakistan use the WS-21 engine on? JF-17?
 
Watch this magic. As soon as the detonation engine was fired, the plane disappeared amazing

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Watch this magic. As soon as the detonation engine was fired, the plane disappeared amazing

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What plane is this?
 
What will Pakistan use the WS-21 engine on? JF-17?
My Guess is PFX.
The information I got was that there was only one engine. So it's unlikely to be for the PFX.
1, If it is for PFX, obviously, it is unlikely that Pakistan will buy only one engine. More engines are needed for basic trials and testing.
2, from what has been made public, it seems that Pakistan does not have a relevant test bed at the moment. the relevant tests for the JF-17 are conducted at CAC.

If PAF's purchase of J-35 is already underway, then I presume that the engine is for instructional use by Pakistan to train engine maintenance personnel.

Of course, since this news is information I got from an inside source. There is no public news to confirm its authenticity. Therefore, anyone has the right to doubt or question this news and my views about it.
 
The information I got was that there was only one engine. So it's unlikely to be for the PFX.
1, If it is for PFX, obviously, it is unlikely that Pakistan will buy only one engine. More engines are needed for basic trials and testing.
2, from what has been made public, it seems that Pakistan does not have a relevant test bed at the moment. the relevant tests for the JF-17 are conducted at CAC.

If PAF's purchase of J-35 is already underway, then I presume that the engine is for instructional use by Pakistan to train engine maintenance personnel.

Of course, since this news is information I got from an inside source. There is no public news to confirm its authenticity. Therefore, anyone has the right to doubt or question this news and my views about it.

I considered it for the first PFX prototype, but as you pointed out, the engine being for instructional use by Pakistan to train engine maintenance personnel for the J35 seems more likely and plausible.
 
provided an estimated range of 3-6 million USD for the RD93MA and 4-8 million USD for the WS10B. Of course, these estimates could be inaccurate.
I think these are pretty much accurate for Russia atleast. India had 99 GE404 deal with 7M each in 2021. So I'm sure Russian engines fall below it comfortably at 5-6M each.
 
AECC participates in 2025 Abu Dhabi International Defence Exhibition & Conference.
Five engines, including the Taihang(WS-10)/AEP-100B/AES100/AEP60E/AES20, were identified for export.
The news did not specify the exact model of WS-10 that can be exported. Presumed to be WS-10B.
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via Weibo@中国航发(AECC)
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China's new hypersonic engine in development, it will revolutionize the jet engine

China Unveils an Engine Capable of an Astonishing 20,000 KM/H, That Can Circle the Globe in Just 2 Hours​

A new Chinese hypersonic engine could cut long-haul flights to under an hour, pushing aircraft to unprecedented speeds. This breakthrough in propulsion technology might reshape global travel and military strategy.

Arezki Amiri
Published on

March 7, 2025
Read : 3 min
0
Airplane Engine
China Unveils an Engine Capable of an Astonishing 20,000 KM/H, That Can Circle the Globe in Just 2 Hours | The Daily Galaxy --Great Discoveries Channel
A new hypersonic engine developed in China could revolutionize air travel by reducing long-haul flight times to mere minutes. Capable of reaching Mach 16—approximately 20,000 km/h (12,250 mph)—this propulsion system represents a significant leap in aerospace engineering.


Developed at the Beijing Power Machinery Institute, this breakthrough has been documented in the Journal of Propulsion Technology. Researchers claim the engine is more fuel-efficient and stable than previous hypersonic designs, overcoming some of the major challenges that have long hindered this technology.

A Major Leap Beyond Supersonic Travel​

For decades, supersonic aircraft like Concorde pushed the boundaries of speed, but their efficiency and fuel consumption issues limited their success. China’s latest development moves beyond Mach 2 travel, bringing hypersonic flight closer to reality.


The engine operates at 30 kilometers (18.6 miles) above Earth’s surface, using a dual-mode detonation process. At speeds up to Mach 7, it functions through a rotary detonation system, where a continuous shockwave combusts fuel more efficiently than traditional jet engines. Once it exceeds Mach 7, it shifts into oblique detonation mode, ensuring sustained high-speed performance with greater stability.

According to researchers, this approach could achieve up to 80% energy conversion efficiency, far exceeding the 20–30% efficiency of conventional engines. Addressing fuel consumption and stability challenges, this technology moves one step closer to practical hypersonic aviation.

The Engine Was Developed At The Beijing Power Machinery Institute
The engine was developed at the Beijing Power Machinery Institute. Image Scmp

A Revolution in Global Transportation​

If successfully integrated into commercial aircraft, hypersonic propulsion could drastically reduce flight times. A journey from Paris to New York could take less than an hour, and a London-to-Sydney trip could be completed in 90 minutes instead of the usual 22 hours.


The potential extends beyond passenger travel—cargo transport at these speeds could enable near-instantaneous global deliveries, reshaping supply chains and international trade.

The ability to transport goods across vast distances in minutes would eliminate logistical bottlenecks, benefiting industries that depend on rapid shipments, such as medical supply chains and high-value manufacturing.

The Engine Operates In Two Modes
The engine operates in two modes. Image: Eurasian Times

Military and Defense Implications​

The military applications of hypersonic propulsion are equally significant. Aircraft and missiles traveling at Mach 16 would be nearly impossible to intercept with current air defense systems, raising concerns about strategic deterrence and national security.


Unlike conventional fighter jets or ballistic missiles, hypersonic vehicles move so quickly that traditional radar tracking and interception technologies may become obsolete.

China’s advancement in this field is expected to intensify competition among global superpowers. The United States, Russia, and Europe are already investing heavily in hypersonic research, but China’s breakthrough may accelerate the race for high-speed military dominance.

The ability to evade detection and strike with unprecedented speed could fundamentally change the nature of warfare, forcing nations to rethink their defense strategies.


Engineering Challenges and Future Developments​

Despite its potential, significant engineering challenges must be resolved before hypersonic travel becomes a practical reality. Extreme heat and pressure at Mach 16 require advanced thermal protection systems to prevent aircraft from breaking apart.

Materials capable of withstanding these conditions must be developed, and cooling mechanisms must be perfected to ensure structural integrity during flight.

Another major hurdle is stability and control. Previous detonation engines have struggled with shockwave management, making them difficult to operate consistently. Researchers must refine the technology further to ensure that hypersonic engines remain stable across various speed ranges.


Economic feasibility is also a key concern. Although the engine is theoretically more fuel-efficient than traditional propulsion systems, developing cost-effective aircraft that can safely operate at these speeds remains a significant challenge. If the technology proves too expensive, commercial adoption could be delayed for decades.
 
While it may be too early to say, the J-36 design seems more oriented towards long range. If that is so, then is there any indication the current design with the three engines is an interim design, where the center engine will be removed and the two other engines (presumably WS-15) will be replaced with a larger diameter engine, similar to how the B-21 has only two engines but of larger diameters? A 50-80% increase in diameter could result in enough extra thrust to overcome the loss of the central engine and then some.

Perhaps a derivative of CJ-2000 engine being developed for the C-929. Except the J-36, it will be a variable cycle engine capable of supersonic flight but also improved fuel efficiency.

If neighboring countries like India plan to field many squadrons of Su-57E, then a platform that has the range and capacity to launch volleys of long range missiles from hundred of KM maybe come a necessity. The longer range could allow the J-36 to operate from Yunnan and Xinjiang, and not require tanker support during a patrol over Tibet or the Indian Ocean in support of a PLAN task force patrolling the SLOCs there.
 
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