Chinese Aviation Industry

pbd456 said:

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Please stop this off topic to and fro, and meaningless arguement for arguement sake. This is my last post to you.

Il-62 had certificate of air worthiness, that is why it was allowed to fly commercial services from Soviet/Russia to USA. And it was operated by France, Japan, Netherland, Turkey, India and many other countries

At an hosted by Huawei, COMAC announces the industry's first 3D supercritical airfoil airflow simulation model developed using Huawei's Ascend AI platform. Using this model, simulation time (single run) is shortened by 1000 times.

Y-12F from the European Union Aviation Safety Agency.

Speaking of Y-12, SLAF accepted 2 additional Y-12 IV to their existing fleet.

Y12F aircraft has obtained model certificate issued by European Union Aviation Safety Agency

The second C919 was delievered to China Eastern Airlines in Shanghai on July 14. It will join with the first C919 to fly between Shanghai and Chengdu initially.

The first C919 has flown 250.10 hours in 87 commercial flights since its debut on May 28. It has carried 11095 passengers so far.

第二架国产C919“入列” 将与首架机搭档执飞沪蓉快线​

今天，中国东航在上海正式接收第二架国产C919大型客机。上午10时，飞机从上海浦东国际机场调机飞往上海虹桥国际机场，正式“入列”东航机队。新一架C919飞机的到来，标志着东航商业运营C919大型客机正在提速。

据介绍，此次东航接收的C919大型客机为东航首批采购5架C919客机中的第2架，客舱布局与首架机保持一致。

7月14日，民航华东地区管理局向东航颁发第二架C919飞机的国籍登记证、适航证、无线电台许可证，标志着该飞机已具备商业运营资质，符合民航规章的适航要求。根据东航的规划，第二架C919将与首架机“搭档”，首先投入东航“上海虹桥—成都天府”空中快线，后续将逐步拓展更多航线。

作为国产C919大型客机的全球首发用户，东航于2022年12月9日正式接收C919的全球首架交付机；2023年5月28日，东航圆满完成C919首个商业航班“上海虹桥——北京首都”的往返飞行，此后这架C919在沪蓉快线上服务旅客。截至7月12日，首架C919共执行87班次商业航班，其中京沪航班2班、沪蓉航班85班，平均客座率近80%，累计服务旅客11095人次，累计商业运行250.10小时。

by78 said:

The JF-22 hypersonic wind tunnel has officially passed the acceptance test. The JF-22 can simulate altitudes of 40 to 100 kilometers. The max flow speed is 10km/sec, equivalent to 30 times the speed of sound. It's a crucial piece of infrastructure for China's missile and space programs as well as for developing hypersonic vehicles.

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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.

Changhe is set to build a new R&D and production base for heavy helicopters. The project is in land survey phase, with surveys to be conducted on a 19.6-acre plot of land. Of course, this by no means is the total planned area.

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.

只能使用 aep500