Please select your home edition
Edition
Marine Resource 2016

Shanghai to San Francisco in under 2 hours via supersonic sub

by Stephen Chen on 30 Aug 2014
. .
China has edged a step closer to creating a supersonic submarine that could travel from Shanghai to San Francisco in under two hours and this technolgy could find its way into racing yachts. It has nothing to do with cruising whatsoever, its just an interesting read.

New technology developed by a team of scientists at Harbin Institute of Technology's Complex Flow and Heat Transfer Lab has made it easier for a submarine, or torpedo, to travel at extremely high speeds underwater.

Li Fengchen, professor of fluid machinery and engineering, said the team's innovative approach meant they could now create the complicated air 'bubble' required for rapid underwater travel. 'We are very excited by its potential,' he said.

Water produces more friction, or drag, on an object than air, which means conventional submarines cannot travel as fast as an aircraft.

However, during the cold war, the Soviet military developed a technology called supercavitation, which involves enveloping a submerged vessel inside an air bubble to avoid problems caused by water drag.

A Soviet supercavitation torpedo called Shakval was able to reach a speed of 370km/h or more - much faster than any other conventional torpedoes.

Some years ago Australian Sean Langman set out to build a world speed record sailing craft using this technogy, with design work done by Andy Dovell, of Murray, Burns, Dovell . The project did not proceed but the application was recognised.

In theory, a supercavitating vessel could reach the speed of sound underwater, or about 5,800km/h, which would reduce the journey time for a transatlantic underwater cruise to less than an hour, and for a transpacific journey to about 100 minutes, according to a report by California Institute of Technology in 2001.

However, supercavitation technology has faced two major problems. First, the submerged vessel has needed to be launched at high speeds, approaching 100km/h, to generate and maintain the air bubble.

Second, it is extremely difficult - if not impossible - to steer the vessel using conventional mechanisms, such as a rudder, which are inside the bubble without any direct contact with water.

As a result, its application has been limited to unmanned vessels, such as torpedoes, but nearly all of these torpedoes were fired in a straight line because they had limited ability to turn.

Li said the team of Chinese scientists had found an innovative means of addressing both Read the full story

NaiadAncasta Ker 33 660x82Mackay Boats

Related Articles

Coast Guard joins Arctic stakeholders in historic forum
U.S. Coast Guard Commandant Adm. Paul Zukunft joined leaders representing eight coast guards of Arctic nations U.S. Coast Guard Commandant Adm. Paul Zukunft joined leaders representing eight coast guards of Arctic nations in signing a joint statement Friday. The statement adopts doctrine, tactics, procedures and information-sharing protocols for emergency maritime response and combined operations in the Arctic. The Arctic Coast Guard Forum is an operationally-focused, consensus-based organisation...
Posted on 24 Mar
Coast Guard Foundation announces tribute in New Orleans
Coast Guard Foundation announced that its Tribute to the Coast Guard District will be held at the National WW II Museum The Coast Guard Foundation, a non-profit organization committed to the education and welfare of all Coast Guard members and their families, announced today that its annual Tribute to the Eighth Coast Guard District will be held at the National World War II Museum in New Orleans, Louisiana on Friday, March 10, 2017.
Posted on 7 Mar
Coast Guard Foundation announces Scholarship Season now open
The Coast Guard Foundation, a non-profit organization, announced that it has kicked off its 2017 scholarship season. he Coast Guard Foundation, a non-profit organization committed to the education and welfare of all Coast Guard members and their families, announced today that it has kicked off its 2017 scholarship season. Accepting applications from March 1st through April 15th, children of enlisted Coast Guard members may apply for annual scholarships ranging from $1,000 to $5,000.
Posted on 28 Feb
Coast Guard Foundation receives donation from Ice Hockey Team
Coast Guard Foundation announced today that it received a donation from the Guilford High School Ice Hockey Booster Club The Coast Guard Foundation, a non-profit organization committed to the education and welfare of all Coast Guard members and their families, announced today that it has received a donation from the Guilford High School Ice Hockey Booster Club for $2,568, to benefit the Coast Guard Foundation’s Fallen Heroes Fund and Scholarship Fund.
Posted on 25 Feb
Bavaria Yachts to introduce Cruiser 34 and Nautitech 46
The Cruiser 34 will be on show at the Bavaria Yachts display at the Strictly Sail boat show at Bayside’s Miamarina The Cruiser 34 will be on show at the Bavaria Yachts display at the Strictly Sail boat show at Bayside’s Miamarina, from February 16th to 20th.
Posted on 13 Feb
Unique Transatlantic Sailing Event - Building friendship across oceans
Rendez-Vous 2017 Tall Ships Regatta, organised to celebrate Canada 150, 150th anniversary of the Canadian Confederation. Sailing in the wake of the great explorers, international friendship and understanding is at the core of this once in a lifetime adventure - The Rendez-Vous 2017 Tall Ships Regatta, organised to celebrate Canada 150, the 150th anniversary of the Canadian Confederation.
Posted on 10 Feb
Frigid flying – Coast Guard aircrews take on New England Winter
Freezing rain? Teeth-chattering temperatures? Limited visibility? Coast Guard aircrews are still ready to fly. Freezing rain? Teeth-chattering temperatures? Limited visibility? Coast Guard aircrews are still ready to fly. At Air Station Cape Cod, aviation maintenance and electronic technicians work around the clock to ensure the MH-60 Jayhawk helicopters are prepared and ready to launch. There is one thing the maintenance crews and pilots cannot control: winter weather.
Posted on 9 Feb
On board interview with Lisa Blair - solo Antartica circumnavigation
So far, Lisa is tracking very well in her attempt to become the first woman to sail solo around Antartica. So far, Lisa is tracking very well in her attempt to become the first woman to sail solo around Antartica. After the setbacks of a delayed departure due to gremlins in the electronics, we are delighted to have these answers from her on board. She is well and enjoying her time. Climate Action Now, her Hick 50, left Albany in Western Australia on January 22, 2017.
Posted on 8 Feb
Yachting cartoonist Mike Peyton dies at 96
“The World’s Greatest Yachting Cartoonist” died on January 25, 2017 just five days after his 96th birthday. Mike Peyton, dubbed “The World’s Greatest Yachting Cartoonist”, died on January 25, 2017 just five days after his 96th birthday. A modest, shy man, he eschewed the spotlight and seemed unaware of the esteem which in sailors all around the world held him.
Posted on 27 Jan
Zhik Xeflex® - your shield against cold environments
This radiant barrier mid-layer nearly defies description. This radiant barrier mid-layer nearly defies description. How do you make a water resistant garment that really breathes, yet reflects your own body heat back to you? Where do you find a compression resistant and extremely insulating filling that is nowhere near as bulky as the Michelin Man, yet gives you that kind of warmth and comfort?
Posted on 17 Jan