Chinese Engine Development

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sndef888

Captain
Registered Member
Just glanced through wiki and it seems like most turboprop airliners use pretty weak engines.

The ATR72 and russian equivalent IL-114 both use only 2x 1800kw engines

The Dash 8-400 only has 2x 3700kw engines despite a higher MTOW than MA700

The AEP500 with 2x 5000kw for the MA700 seems a little like overkill. Do we know whether this is a good thing? (maybe lower fuel consumption? is it going to cost substantially more?)
 
O

OppositeDay

Senior Member
Registered Member
sndef888 said:
Just glanced through wiki and it seems like most turboprop airliners use pretty weak engines.

The ATR72 and russian equivalent IL-114 both use only 2x 1800kw engines

The Dash 8-400 only has 2x 3700kw engines despite a higher MTOW than MA700

The AEP500 with 2x 5000kw for the MA700 seems a little like overkill. Do we know whether this is a good thing? (maybe lower fuel consumption? is it going to cost substantially more?)
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Data on Wikipedia is for MA700 with PW150C. Replacing PW150C with AEP500 will result in increased MTOW and maximal speed.
 
by78

by78

General
A screenshot of an academic paper that I cannot locate. It talks about the complex welding processes used to build the casing of a certain turbofan. I wonder which turbofan this is. In the illustration, the intake/front of the engine is facing right.

Anyway, the casing is composed of 27 pieces made of various titanium alloys, which require several different welding techniques to join together, leaving behind some 170 welding seams that present quality-control challenges. Due to this complexity, it's prohibitively expensive and time-consuming to develop optimum welding parameters/processes purely through hands-on experimentation. Instead, sophisticated computer simulations were used to shorten and ease the development.

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by78

by78

General
Overbom said:
Engine for UAVs
"Anhui Hangrui Co. has developed a 300kW UAV aero-engine. It adopts the dual boost system to achieve no power attenuation performance at an altitude of 6,000 meters, and the operating ceiling can reach 12,000 meters. The CH5 drone can achieve 120 hours of cruising with it."
https://twitter.com/i/web/status/1503640860944084997
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A CH-4 equipped with a domestic heavy oil piston engine has successfully completed its maiden flight. Not sure if it uses the same engine as the one in your post.

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by78

by78

General
The "Golden Eagle", China's first indigenous heavy-fuel piston engine. It was developed by a private company. It's a liquid-cooled, eight-cylinder, four stroke design rated at 600KW and features
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.

Some specs:
- Fuel types: Diesel, RP-3/RP-5
- Maximum Continuous Power/RPM: 805hp @ 4000rpm
- Minimum Specific Fuel Consumption: 220g/kW-hour
- Weights: 515kg (aviation version), 650 (ground version)
- Dimensions: 1205x1185×849mm
- Time Between Overhauls: 2000 hours
- Max operating altitude: 10000m
- No power loss at altitudes at or below 4500m
- Suitable for heavy long-endurance UAVs, light helicopters, fixed-wing general aviation aircraft, etc.

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ThatNiceType055

ThatNiceType055

Junior Member
Registered Member
by78 said:
A CH-4 equipped with a domestic heavy oil piston engine has successfully completed its maiden flight. Not sure if it uses the same engine as the one in your post.

52292128874_72f05b435e_o.jpg

52292129129_07258319e1_h.jpg

52291862456_d6b43e7065_h.jpg
52291862471_a73b9c2950_h.jpg
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A more powerful model by the same company Anhui Hangrui Co. The one you quoted is 300kw, this one is 600kw.
by78 said:
The "Golden Eagle", China's first indigenous heavy-fuel piston engine. It was developed by a private company. It's a liquid-cooled, eight-cylinder, four stroke design rated at 600KW and features
Please, Log in or Register to view URLs content!
.
Click to expand...
 
ThatNiceType055

ThatNiceType055

Junior Member
Registered Member
Please, Log in or Register to view URLs content!
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OK now we have official information from Hangrui, the engine on CH-4 is actually the 118kw model, not 300kw or 600kw...（Note that CH is short for Caihong, which means Rainbow in Chinese. The engine's name Yunque means Lark, a kind of bird）

“云雀”助力“彩虹-4”无人机升级版更高更远更安全​


近日，由中国航天科技集团有限公司十一院航天彩虹无人机股份有限公司自主研发的中空长航时重油无人机圆满完成科研试验。
本轮飞行设计了多种飞行构型进行验证，圆满完成了自主起降、短距滑跑起飞、航点飞行、满载运输、最高升限、最长航程航时等试验科目。
图片

彩虹-4升级版无人机所采用的“云雀”重油航发，由航瑞动力自主设计，100%自主产权，100%国产化。换装后的彩虹-4无人机可以满足“飞得更高、航时更长、安全性更好”的需求
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"Lark" helps "Rainbow-4" UAV upgrade to be higher, farther and safer

Recently, the medium-altitude long-endurance heavy-oil unmanned aerial vehicle independently developed by China Aerospace Science and Technology Group Co., Ltd. Eleventh Academy Aerospace Rainbow Unmanned Aerial Vehicle Co., Ltd. successfully completed the scientific research test.

This round of flight has designed various flight configurations for verification, and successfully completed the test subjects such as autonomous take-off and landing, short roll take-off, waypoint flight, full-load transportation, maximum ceiling, and longest range flight time.

picture

The "Skylark" heavy fuel aviation engine used in the upgraded version of the Rainbow-4 UAV is independently designed by Hangrui Power, with 100% independent property rights and 100% localization. The refitted Rainbow-4 UAV can meet the needs of "flying higher, longer flight time, and better safety"
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And according to previous announcement, this engine can support 1.3t to 1.8t fixed wing UAV.

AR-500BJ款无人直升机采用了公司的“云雀”重油航发，“云雀”重油航发由航瑞动力自主设计，100%自主产权，100%国产化。从实际应用角度具有以下特点：

①重油油品：采用重油油品，满足舰载需求。具备后勤油品归一化、保障便捷、长期存储不变质、使用安全性高的特点。

②高海拔性能：5000m功率无衰减，支撑700kg直升机的的平原大载重起降，支撑500kg无人机的高原起降应用。

③高功重比：功率118kW，匹配直升机无减速箱版本功重比1.1，可支撑500-700kg级直升机，1.3t-1.8t固定翼。

④低油耗长航时：全电控缸内直喷，巡航油耗228g/kWh，相比现有行业产品降23%，支撑更长航时。

⑤全权限数字控制系统：双冗余FADEC系统，硬件软件实时热备份，发动机健康状态实时监控；与飞控无缝对接，无需舵机控制。

⑥适用广域作战环境：-40℃~+70℃各种环境均可实现稳定动力输出。尤其面对中东地区，地面温度+50℃，高空温度-30℃，能够实时感知外界环境变化，自适应调整稳定动力输出。
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The AR-500BJ unmanned helicopter adopts the company's "Lark" heavy fuel oil engine, which is independently designed by Hangrui Power, with 100% independent property rights and 100% localization. From the practical application point of view, it has the following characteristics:

①Heavy oil products: Heavy oil products are used to meet the needs of the ship. It has the characteristics of normalization of logistics oil, convenient guarantee, long-term storage without deterioration, and high safety in use.

②High-altitude performance: 5000m power has no attenuation, supporting 700kg helicopters for high-load take-off and landing on the plains, and supporting 500kg drones for plateau take-off and landing applications.

③High power-to-weight ratio: The power is 118kW, matching the power-to-weight ratio of the helicopter without a gearbox version of 1.1, which can support 500-700kg helicopters and 1.3t-1.8t fixed wings.

④Low fuel consumption and long voyage time: the fully electronically controlled direct injection in the cylinder, the cruising fuel consumption is 228g/kWh, which is 23% lower than the existing industry products, and supports longer voyage time.

⑤Full authority digital control system: dual redundant FADEC system, real-time hot backup of hardware and software, real-time monitoring of engine health status; seamless connection with flight control, no need for steering gear control.

⑥Applicable to wide-area combat environment: stable power output can be achieved in various environments from -40°C to +70°C. Especially in the Middle East, the ground temperature is +50°C and the high-altitude temperature is -30°C, which can sense changes in the external environment in real time, and adaptively adjust and stabilize the power output.
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