Tag Archives: air

Wind turbines are going big, real big – latest one is the size of a 747 airplane

Right now wind is leading the renewable energy surge and records for the largest turbines are being set. Just how big is the largest one? Siemens is creating a single blade that is 225 feet long, basically as wide as a 747 airplane.

The manufacturing process is incredible, from Wired UK:

Siemens manufactures the mammoth B75 blades in one, smooth, streamlined piece — with no joints — using its IntegralBlade process. The technique — which requires glass fibre-reinforced epoxy resin and balsa wood to be cast in a mould — renders the blades steadfast and less likely to develop faults while being beaten with 181 tonnes of air energy every second, when wind speeds are ten metres per second (30 mph). The huge strain it is put under means no blade can leave the factory without being carefully inspected for even minor cracks.

 

The size of these things is almost unimaginable, like trying to picture three 747′s spinning around a massive pole. They will also have to shoot up into the sky several hundred meters.

According to Siemens, when fully constructed this mammoth would generate 6-megwatt’s, while another group is looking into 20-megawatt versions!

 

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Amazing Species: Sea Slug – swallows bubbles, eats stinging cells

 

Sea Slugs of Hawaii

This little guy is called Glaucus Atlanticus. It is a species of sea slug that grows to around 35 mm. They float partially by means of an air bubble, which they swallow and store in their gastric cavity. They also have a rather unique defence mechanism – they store the nematocysts produced by jellyfish (their prey) in their own tissues to protect against predators.

 

Find more awesome creatures on the Facebook page – I F***ing Love Science - and see the last amazing species, the carnivorous plant.

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Trees are virtual air conditioners that save millions in electricity, water, carbon

 

An article from The Atlantic focuses on the value of trees:

I was approached by someone from an initiative called San Diego County Trees…(a project) extolling the benefits of urban trees. I just spent time on the website, where the coolest feature is an interactive map of the whole county showing very specific tree locations and information, including quantified benefits…(like) carbon sequestration, water retention, energy saved, and air pollutants reduced.

 

Wow! Look at that image…millions of dollars in savings, water conservation, improved air quality. That is impressive.

Some more facts include, “the net cooling effect of a young, healthy tree is equivalent to ten room-size air conditioners operating 20 hours a day,” and the energy savings of planting a tree on the sunny side of your house (3% after 5 years, 12% after 15 years).

I love trees.

Apple Campus II – 3,600 jobs and the big push into Austin, Texas

Pushing ahead with plans to invest $304 million in Austin, Texas, Apple has secured a deal for three large patches of land adjacent to its existing campus, which — when developed — will expand its presence in the area and result in the creation of more than 3,600 jobs.

The State of Texas offered Apple an investment of $21 million over ten years via its Texas Enterprise Fund (TEF), followed by an $8.6 million grant investment from the City of Austin.

As part of its City deal, Apple would need to invest $56.5 million in new facilities and equipment by the end of 2015, with an additional $226 million investment coming by the end of 2021.

 

Source: The Next Web - Apple closes deal to expand Austin campus, moves ahead with $304 million Texas investment

 

 

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U.S. Air Force places overpowering jet armada near Iran

The U.S. Air Force is quietly assembling the world’s most powerful air-to-air fighting team at bases near Iran. Stealthy F-22 Raptors on their first front-line deployment have joined a potent mix of active-duty and Air National Guard F-15 Eagles, including some fitted with the latest advanced radars. The Raptor-Eagle team has been honing special tactics for clearing the air of Iranian fighters in the event of war.

The highly-experienced Massachusetts Guardsmen, who typically have several years more experience than their active-duty counterparts, would be ready “should Iran test the 104th,” said wing commander Col. Robert Brooks.

…it’s the methods above that the U.S. dogfighting armada would likely use to wipe out the antiquated but determined Iranian air force if the unthinkable occurred and fighting broke out. The warplanes are in place. The pilots are ready. Hopefully they won’t be needed.

via Wired – Danger Room

 

F-15 Eagle at Mountain Home Air Force Base

 

// Photo - Bundeswehr-Fotos Wir.Dienen.Deutschland.

Jet travels more than 13,000 mph (Mach 20) thanks to sleek aerodynamic systems

It’s amazing that this Hypersonic jet was able to travel more than 13,000 mph with heats of over 3,500 degrees.

During flight it experienced shockwaves, 100 times more powerful than expected, which caused it to spin. It then righted itself and flew for twice as long before technicians finally aborted the mission.

The full story:

In August the Pentagon’s research arm, known as DARPA, carried out a test flight of an experimental aircraft capable of traveling at 20 times the speed of sound.

The arrowhead-shaped unmanned aircraft, dubbed Falcon Hypersonic Technology Vehicle 2, blasted off from Vandenberg Air Force Base, northwest of Santa Barbara, into the upper reaches of the Earth’s atmosphere…then glided above the Pacific at 20 times the speed of sound, or Mach 20.

The plan was for the Falcon to speed westward for about 30 minutes before plunging into the ocean near Kwajalein Atoll, about 4,000 miles from Vandenberg.

But it was ended about nine minutes into flight for unknown reasons. The launch had received worldwide attention and much fanfare, but officials didn’t provide much information on why the launch failed.

via LA Times

 

Then last week, DARPA said in a statement:

The flight successfully demonstrated stable aerodynamically-controlled flight at speeds up to Mach 20 for nearly three minutes. Approximately nine minutes into the test flight, the vehicle experienced a series of shocks culminating in an anomaly, which prompted the autonomous flight safety system to use the vehicle’s aerodynamic systems to make a controlled descent and splashdown into the ocean.

“The initial shockwave disturbances experienced during second flight, from which the vehicle was able to recover and continue controlled flight, exceeded by more than 100 times what the vehicle was designed to withstand,” said DARPA Acting Director, Kaigham J. Gabriel. “That’s a major validation that we’re advancing our understanding of aerodynamic control for hypersonic flight.”

…larger than anticipated portions of the vehicle’s skin peeled from the aerostructure. The resulting gaps created strong, impulsive shock waves around the vehicle as it travelled nearly 13,000 miles per hour, causing the vehicle to roll abruptly. Based on knowledge gained from the first flight in 2010 and incorporated into the second flight, the vehicle’s aerodynamic stability allowed it to right itself successfully after several shockwave-induced rolls. Eventually, however, the severity of the continued disturbances finally exceeded the vehicle’s ability to recover.

via DARPA

Hypersonic Technology Vehicle (HTV-2)