News: China develops water-skimming plane

adeptitus

Captain
VIP Professional
I wonder if they'd build the first commercially viable ekranoplane? Russia already tried this since 1960s and have not had much success.

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China develops water-skimming plane
"Wing In Ground" aircraft can fly as low as 1 foot 7 inches off the surface, hitting speeds up to 180 miles per hour.

By Reuters
Published: July 11, 2007, 8:25 AM PDT

Chinese scientists have developed a "Wing In Ground" aircraft which can fly long distances just a few feet above the sea surface, state media said Wednesday.

The plane can fly as low as half a meter (1 foot and 7 inches) off the surface, hitting speeds of up to 180 miles per hour and can carry up to 4 metric tons on takeoff.

"It's as safe as ships, although five or six times faster," associate professor Xu Zhengyu, vice president of the research team at Tongji University in Shanghai, was quoted as saying.

"And it can carry much more weight than ordinary planes while costing half as much and using half as much fuel," he said.

Wing In Ground (WIG) effect refers to the reduction in drag experienced by an aircraft as it approaches a height approximately twice a wingspan's length off the ground or other level surface such as the sea.

Xu said the plane could be flown for military use and border control.

Tongji University planned to develop a 50-seat WIG by 2013, with 200 prototypes capable of carrying 200 to 400 metric tons scheduled for 2016 or 2017.

"Taking advantage of the aerodynamics of the ground effect, which adds extra lift when flying at very low altitudes, the aircraft can fly close to the water's surface," the China Daily said.

"This cuts back at least one-third on fuel consumption, compared with standard planes of the same size, because the plane can benefit from air buoyancy," the newspaper added.

The WIG has been listed as one of three types of aircraft given the green light in the general aviation field by the State Commission of Science Technology and Industry for National Defense, Xu was quoted as saying.

"However, the Civil Aviation Administration of China has yet to confirm aviation regulations at such low altitudes, which may become a problem," the Xinhua news agency said.

Story Copyright © 2007 Reuters Limited. All rights reserved.
 

Jeff Head

General
Registered Member
China develops water-skimming plane
"Wing In Ground" aircraft can fly as low as 1 foot 7 inches off the surface, hitting speeds up to 180 miles per hour.

By Reuters
Published: July 11, 2007, 8:25 AM PDT

Chinese scientists have developed a "Wing In Ground" aircraft which can fly long distances just a few feet above the sea surface, state media said Wednesday.

The plane can fly as low as half a meter (1 foot and 7 inches) off the surface, hitting speeds of up to 180 miles per hour and can carry up to 4 metric tons on takeoff.
Hmmm...sounds sort of like my
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novel, which by the way, is available for free to all SD forum members as a professional Adobe eBook download at the folling link.

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In that novel, such aircraft are deployed (albeit by the US). But it is not new technology, using the surface wave effect of the aircraft's passage to provide extra lift. This is something that Howard Hughes Spruce Goose was also built to do.

I used it on what I called C-90A transport aircraft, over 300 ft long and with a wing span fo 500 ft. Four very large and efficient turbo-props on each wing.

Anyhow...this is neat technology...but I believe for safety purposes, the aircraft will have to fly somewhat higher than spoken of here (1 ft 7 inches). If the aircraft is large enough, a 30-50 ft height could provide the desired additional lift while maintaining a better safety margin. You end up getting unbelievable fuel economy in theory.
 

Scratch

Captain
But don't those things require a rather low sea state?
I mean if the waves are some meters high, you need a certain altitude at wich the effect might already decrease. And the ground is also uneven and "moving", so I imagine you might get in some turbulences.
 

adeptitus

Captain
VIP Professional
Anyhow...this is neat technology...but I believe for safety purposes, the aircraft will have to fly somewhat higher than spoken of here (1 ft 7 inches). If the aircraft is large enough, a 30-50 ft height could provide the desired additional lift while maintaining a better safety margin. You end up getting unbelievable fuel economy in theory.

Excellent point Jeff. Lots of boats in the ocean... it's probably not safe to fly too low at fast speeds. Ramming into a ship at few hundred miles per hour would be quite bad.

I reside in South CA, the H-4 Hercules (aka Spruce Goose) used to be housed by Queen Mary in Long Beach here, until its relocation of Evergreen Aviation Museum in Oregon.

Did you base your C-90A on the Boeing Pelican Ultra?
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Jeff Head

General
Registered Member
Excellent point Jeff. Lots of boats in the ocean... it's probably not safe to fly too low at fast speeds. Ramming into a ship at few hundred miles per hour would be quite bad.

I reside in South CA, the H-4 Hercules (aka Spruce Goose) used to be housed by Queen Mary in Long Beach here, until its relocation of Evergreen Aviation Museum in Oregon.

Did you base your C-90A on the Boeing Pelican Ultra?
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Yes I did. The Boeign Pelican (which is a design that is out there and could be taken up at anytime) provided a spring-board for what the novels proposed.

Boeing_Pelican_ULTRA_02.jpg
 

planeman

Senior Member
VIP Professional
I think the news article is just refreshing old news. The Chinese WIG programme is well known and several medium sized (by WIG standards) aircraft have been flown. 4t payload is not all that much for a WIG.

From another thread on Chinese WIG: http://www.sinodefenceforum.com/showthread.php?t=1950
14ayath.png


14kbp80.png


The design specs described in the article are only slightly faster than this:
14curk1.png
 

kunam

Just Hatched
Registered Member
Russia, China, Iran,..is there any other country developed this technology?
 

Skywatcher

Captain
I think the British may have been working on it at one time. Though I probably confused them with someone else.

Would be interesting if the thing was powered by hydrogen generated from a nuclear reactor.
 
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