Chinese Aviation Industry

first flight in China using 10% SAF blend. Btw, this is something that has already happened in a few us airlines. Up until now, it's still considered to expensive and probably not safe to do more than that for flights, but it's a direction we need to go for 0-carbon

gelgoog said:

And where is the engine for this heavy helicopter? The Russians are still producing the Mi-26T2V with Ukrainian D-136 engines.
The Russian's own PD-8V turboshaft engine still not under testing, while the PD-8 turbofan engine which uses the same core is conducting flight tests.

China's own CJ-500 engine is even further behind.

At best China could get some D-136 engines somewhere, make a prototype, and hope the alternative engines show up eventually.

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Changhe proceeding one step ahead for Heavy lift Helicopter. it means they are clear which engine this helicopter is going to use. without engine confirmation they cannot proceed further.

now the main Question. where is the engine for this HLH..

when AEP-500 turboprop engine appeared, AECC also showcase 5000kw class Turboshaft engine.




first prototype assembled in 2020 and further ground testing have been successful. after that we don't have any information about this engine in mainstream Media.

Turboprop/Turboshaft engines are relatively less popular among fans as compared to turbofans.

another inside news is, AECC working on 8000kw heavy duty turboshaft engine. could be derived from CJ-1000's core. again no official confirmation.

Russia-Ukraine war proved to be last Nail in the coffin. there was a good chance that AVIC might go for D-136 turboshaft engine but now chance is very minimal..

Russia right now don't have engine in this class so most probably Changhe will use domestic engine even if power output is not sufficient initially.

by78 said:

A TV segment on the JF-22 hypersonic wind tunnel. Some specs are as follows:
- Diameter: 2.5 meters
- Length: 167m
- Temperature range of hypersonic flows: 2500°C to 18000°C
- Air pressure: 100 to 10000 standard atmospheres (atm)
- Air flow speed: Mach 5 to 30
- Simulated altitude: 25 to 90km
- Simulation duration: 40ms at Mach 10

Interestingly, the TV segment also reveals that an oblique detonation wave engine (using aviation kerosene) was tested in JF-22's predecessor, the JF-12 hypersonic wind tunnel, and the engine has achieved stable operation at Mach 9. Next, the engine will be tested in JF-22 at up to Mach 16.

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Let's compare this with the recent Mach 40 wind tunnel commissioned in the USA.

I found a few news articles.



The US tunnel is much smaller. It is ~46 meters long and, apparently, has a diameter of less than a meter. In simulation duration, the article says the longest possible test is a hundredth-of-a-second (10 ms) long. The JF-22 is rated for 40 ms at Mach 10.

The temperature part is confusing. The JF-22 is rated for 18000 celcius. The US tunnel is rated for ~7750 celcius. I am not educated about these topics so correct me if I am wrong. I'd guess the temperature is directly related to how much the air is compressed before going through the nozzle. A nozzle exchanges temperature and pressure to speed. The higher temperature of the JF-22's flow likely means the air is of higher pressure before going through the nozzle, and less of its potential energy is converted to speed. Therefore we can conclude that the JF-22 is rated for much denser flows. This means it would be able to simulate lower altitudes than the American tunnel.

YUSHIGUO said:

只能使用 aep500
View attachment 115958View attachment 115959View attachment 115960

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This is an English language forum. Please write your messages in English. These images are almost 10 months old and have already been shared in the appropriate thread.

BoraTas said:

Let's compare this with the recent Mach 40 wind tunnel commissioned in the USA.

I found a few news articles.

Please, Log in or Register to view URLs content!

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The US tunnel is much smaller. It is ~46 meters long and, apparently, has a diameter of less than a meter. In simulation duration, the article says the longest possible test is a hundredth-of-a-second (10 ms) long. The JF-22 is rated for 40 ms at Mach 10.

The temperature part is confusing. The JF-22 is rated for 18000 celcius. The US tunnel is rated for ~7750 celcius. I am not educated about these topics so correct me if I am wrong. I'd guess the temperature is directly related to how much the air is compressed before going through the nozzle. A nozzle exchanges temperature and pressure to speed. The higher temperature of the JF-22's flow likely means the air is of higher pressure before going through the nozzle, and less of its potential energy is converted to speed. Therefore we can conclude that the JF-22 is rated for much denser flows. This means it would be able to simulate lower altitudes than the American tunnel.

Click to expand...

HYPULSE is an old NASA wind tunnel which was mothballed after the cold war.

As part of its certification process, AG600 has recently completed verification of its firefighting apparatus. AG600 is expected to complete its certification in 2024.

商飞时代（上海）航空有限公司, a joint venture by CATL, COMAC and SJTU, founded recently. The registered total capital is 600m yuans. The new company will be in the business of civil aircraft and components design, manufacturing and repair.

Given that when annoucing its latest generation of power batteries in April, CATL stated that the new batteries are for uses in land, sea and air, it is speculated that this joint venture might be for electric powered aircrafts.

着手航空领域，锂电巨头宁德时代联合商飞成立航空公司。

据观察者网查询企查查APP显示，近日，商飞时代（上海）航空有限公司成立，法定代表人为钱仲焱，注册资本6亿元人民币，经营范围含民用航空器零部件设计和生产、民用航空器（发动机、螺旋桨）生产、民用航空器维修等。

据股权穿透显示，该公司由宁德时代新能源科技股份有限公司、中国商用飞机有限责任公司、上海交大企业发展集团有限公司共同持股。

今年4月19日，在2023上海车展上，宁德时代发布新一代电池技术——“凝聚态电池”，这被喻为是继麒麟电池之后，又一项创新的里程碑技术。此次宁德时代投资成立航空公司，不免引发市场关于其布局电动飞机市场的遐想。

据了解，凝聚态属于锂电池的一种，相比于其他类型的锂电池，具有更高的能量密度。目前采用三元正极材料的锂电池，能量密度最高为350 Wh/kg。凝聚态电池的能量密度相对提高了超四成。

据宁德时代网站介绍，凝聚态电池的问世，全面开启了海陆空全域电动化的时代，为产业发展打开了丰富的想象空间，将持续推动全球碳中和目标的早日实现。

此外，宁德时代首席科学家吴凯彼时透露，目前正在就凝聚态电池进行民用电动载人飞机的合作开发，执行航空级的标准和测试。同时，宁德时代将推出凝聚态电池的车规级版本，可在今年内具备量产能力。

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AG600 has completed cockpit water ingress tests as part of the ongoing certification process. The tests show that the cockpit design remains watertight when flying in extreme rain.

SanWenYu said:

商飞时代（上海）航空有限公司, a joint venture by CATL, COMAC and SJTU, founded recently. The registered total capital is 600m yuans. The new company will be in the business of civil aircraft and components design, manufacturing and repair.

Given that when annoucing its latest generation of power batteries in April, CATL stated that the new batteries are for uses in land, sea and air, it is speculated that this joint venture might be for electric powered aircrafts.

Please, Log in or Register to view URLs content!

View attachment 116084View attachment 116085

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Dutch start-up company Maeve Aerospace plans to manufacture a 44-seat all-electric regional airliner Maeve 01 by 2029, and released an image of it.

Maeve 01 has 8 wing propellers, can fly 460 kilometers at a cruising speed of 488 kilometers per hour, will achieve zero emissions, and reduce noise by 40%, and the charging time is 35 minutes.

The company expects that based on advances in battery technology, the airliner could be converted to a 52-seat passenger plane in 2032 and achieve a flight range of 710 kilometers in 2040. The company plans to produce as many as 1,200 of the aircraft in the future.



so COMAC Joint Venture with CATL could be a project like this.

in this joint venture CATL, COMAC and SJTU will establish a firm for Civil engine components manufacturing.

the outcome of this joint venture will be huge. if everything goes well. look what China has done with EVs as compared to ICE automobile.

on the idea of COMAC & CATL creating an electric plane

1、商飞需要宁德时代。宁德时代凝聚态电池的能量密度提升到了 500Wh/kg，相对当下电动汽车动力电池领域最高不到 300Wh/kg 的数据提升了将近一倍，足够支线客机的能量密度要求。 100 座以内、600-1200km 航程的航空用途，电动化成为可能。而且，考虑到国际关系和技术水平，宁德时代是商飞几乎唯一可能的供应商。

2、宁德时代也需要商飞。飞机动力电池，不是性能达标即可，安全同样一票否决。电池适航认证须从原始设计开始贯穿全生命周期，而商飞可以说是全球范围内唯一能提供认证平台和指导的客户（考虑到国际关系，ABE之类外国企业不可能）。宁德时代想在航空动力电池有所作为，乃至未来走向世界，也只能选择商飞。

虽然合资并不能确保项目一定成功，但风险共担收益共享的合作至少是必不可少的前提条件

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sub 100 seat 600-1200km would be great. I do think that's quite optimistic. I don't know if that's possible. Would be an interesting looking aircraft