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Defence & Aerospace

China to build helicopter that can exceed 700km/h


A model of the Blue Whale at an expo in Tianjin. The rotors provide lift in the horizontal position and forward thrust in the vertical position

A model of the Blue Whale at an expo in Tianjin. The rotors provide lift in the horizontal position and forward thrust in the vertical position

Blue Whale is among the most innovative – and risky – designs on the drawing board as Chinese engineers try to build the world’s fastest helicopter.

The country’s engineers and scientists accomplished much of this by adapting and applying technologies developed elsewhere. Now, they are looking to break new ground altogether by building the fastest helicopters in the world.

Among the most ambitious of such aircraft in the works is the four-rotor “Blue Whale”, a project by the China Helicopter Research and Development Institute. By tilting its four rotors from a horizontal to vertical position, the helicopter promises to reach speeds of more than 700km/h – which would make it the fastest “tiltrotor” in the world, 40 per cent faster than Boeing’s V-22 Osprey, according to the institute.

With a cruising speed of 538km/h, developers say the Blue Whale will lift 20 tonnes of cargo and fly more than 3,100 kilometres without refuelling. It will fly as high as 8,600 metres, also higher than the V-22.

Qiu Guangrong, a director of the institute, told the Global Times last year the group hoped to produce functioning prototypes of its high-speed helicopter within the next five years, although he did not specify which models would be the first produced.

Even today, most conventional helicopters are not suited for speeds exceeding 200 km/h. Above certain speeds, airflow between blades can throw the aircraft off balance. Huge stresses are also placed on engines and mechanical parts, which can fail or break apart.

Over the decades, helicopter designers have tried numerous solutions to break the speed barrier. The twin rotors on Boeing’s CH-47 Chinook, for instance, spin in opposite directions to cancel out each other’s turbulence. The experimental Eurocopter X3, which has a conventional rotor plus twin propelling rotors on fixed wings, reached 486km/h in June.

Tiltrotors like the Blue Whale have rotor pods – called nacelles – mounted on fixed wings. The rotors provide lift in the horizontal position and forward thrust in the vertical position once the craft is airborne.

The government has provided a huge amount of support for the country’s high-speed helicopter projects, which is closely tied to the People’s LiberationArmy’s efforts to build a more modern, mobile military.

In a visit to the institute this month, Lin Zuoming, head of Aviation Industry Corporation of China, the institute’s parent body and the nation’s biggest state-owned aerospace manufacturer, told researchers that “all eyes are on the helicopter industry” which offers “unprecedented opportunities”.

“Enemies are at the gate,” he was quoted on the institute’s website as saying. “Factories and research institutes must … rely on the government’s support to catch up and overtake the world’s best.”

But some doubt whether the institute will be able to produce a functioning prototype of the Blue Whale within its five-year window. The four-rotor design creates its own unique problems, chief among them how to compensate for the turbulence placed on the rear rotors by the front rotors during flight.

“When the Blue Whale is rolled out depends on when these problems are solved,” said Professor Chen Ming , an expert on helicopter design at Beihang University in Beijing. “To me the future is very uncertain.” Chen and several other mainland helicopter experts declined to comment on the project as it involved classified military technology.

Some in the industry also doubt whether China even needs to develop high-speed helicopters while it is still struggling to catch up with developed nations in conventional helicopters.

The weakness of domestic helicopters was exposed during rescue efforts after the Sichuan earthquake in 2008. The PLA sent its most advanced helicopters to the area, but television footage showed that the bulk of the rescue work was carried out by Black Hawk helicopters imported from the US in the 1980s.

Less advanced domestic helicopters proved incapable of operating at high altitude.

The Blue Whale could play vital role in such situations, although the institute said it is being developed mainly for military applications so ‘the Chinese army and navy can achieve ‘all-terrain reach’.”

Source: SCMP “Engineers pursue the ‘Blue Whale’ – the helicopter that can exceed 700km/h”
 

 

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About chankaiyee2

Author of the book "Tiananmen's Tremendous Achievements" about how with the help of Tiananmen Protests, talented scholars with moral integrity seized power in the Party and state and brought prosperity to China. The second edition of the book will be published within a few days to mark the 25th anniversary of Tiananmen Protests All the parts in the first edition remain in the second edition with a few changes due to information available later and better understanding. There are also some changes for improvements of style. The new parts are Chapters 12-19 on events in China after the first edition was published: The fierce power struggle for succession between reformists and conservatives; Xi Jinping winning all elders’ support during his mysterious disappearance for 2 weeks in early September, 2012; and Xi Jinping Cyclone. Chan Kai Yee's new book: SPACE ERA STRATEGY: The Way China Beats The US An eye-opening book that tells the truth how the US is losing to China. The US is losing as it adopts the outdated strategy of Air-Sea Battle while China adopts the space era strategy to pursue integrated space and air capabilities: It is losing due to its diplomacy that has given rise to Russian-Chinese alliance. US outdated strategy has enabled China to catch up and surpass the US in key weapons: Hypersonic weapons (HGV) that Pentagon regards as the weapon that will dominate the world in the future. Aerospaceplane in China’s development of space-air bomber that can engage enemy anywhere in the world within an hour and destroy an entire aircraft carrier battle group within minutes. Anti-satellite (ASAT) weapons, anti-ASAT weapons, stealth aircrafts, drones, AEW&C, etc. The book gives detailed descriptions of China’s weapon development based on information mainly from Chinese sources that the author monitors closely. U.S. Must Not Be Beaten by China! China is not a democracy. Its political system cannot prevent the emergence of a despotic leader or stop such a leader when he begins to bring disasters to people. A few decades ago, Mao Zedong, the worst tyrant in world history did emerge and bring disasters to Chinese people. He wanted to fight a nuclear war to replace capitalism with communism but could not bring nuclear holocaust to world people as China was too weak and poor at that time. If a despot like Mao Zedong emerges when China has surpassed the US in military strength, world people will suffer the misery experienced by Chinese people in Mao era. China surpassing the US in GDP is not something to worry about as China has the heavy burden to satisfy its huge population, but China surpassing the US in military strength will be world people’s greatest concern if China remains an autocracy. US people are of much better quality than Chinese people. What they lack is a wise leader to adopt the correct strategy and diplomacy and the creative ways to use its resources in developing its military capabilities. I hope that with the emergence of a great leader, the US can put an end to its decline and remain number one in the world. China, US, space era strategy, air-sea battle, space-air bomber, arms race, weapon development, chan kai yee

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