Tag: Popular Mechanics

Amusing Information

The Science Of Bruce Lee’s One Inch Punch

The Science Of Bruce Lee’s One Inch Punch

The Science Of Bruce Lee's One Inch Punch

The one inch punch was made famous by Bruce Lee. It is designed to improve punching power and technique. Lee learned the technique from his Wing Chun training in Hong Kong.

Recently Popular Mechanics set out to solve the mystery behind it.

Biomechanical Breakdown

To understand why the one-inch punch is more about mind than muscle, you first have to understand how Bruce Lee delivers the blow. Although Lee’s fist travels a tiny distance in mere milliseconds, the punch is an intricate full-body movement. According to Jessica Rose, a Stanford University biomechanical researcher, Lee’s lightning-quick jab actually starts with his legs.

“When watching the one-inch punch, you can see that his leading and trailing legs straighten with a rapid, explosive knee extension,” Rose says. The sudden jerk of his legs increases the twisting speed of Lee’s hips—which, in turn, lurches the shoulder of his thrusting arm forward.

As Lee’s shoulder bolts ahead, his arm gets to work. The swift and simultaneous extension of his elbow drives his fist forward. For a final flourish, Rose says, “flicking his wrist just prior to impact may further increase the fist velocity.” Once the punch lands on target, Lee pulls back almost immediately. Rose explains that this shortens the impact time of his blow, which compresses the force and makes it all the more powerful.

By the time the one-inch punch has made contact with its target, Lee has combined the power of some of the biggest muscles in his body into a tiny area of force. But while the one-inch punch is built upon the explosive power of multiple muscles, Rose insists that Bruce Lee’s muscles are actually not the most important engine behind the blow.

“Muscle fibers do not dictate coordination,” Rose says, “and coordination and timing are essential factors behind movements like this one-inch punch.”

Because the punch happens over such a short amount of time, Lee has to synchronize each segment of the jab—his twisting hip, extending knees, and thrusting shoulder, elbow, and wrist—with incredible accuracy. Furthermore, each joint in Lee’s body has a single moment of peak acceleration, and to get maximum juice out of the move, Lee must layer his movements so that each period of peak acceleration follows the last one instantly.

 

 
via Neatorama

 

 

Amusing

What a War Between China and the United States Would Look Like

If we had a war with China, 0bama’s first step would be to nuke OUR largest cities, just so China would know that we weren’t angry or anything.

From Popular Mechanics:

August 9, 2015 – 0400 Hours

The war for Taiwan starts in the early morning. There are no naval bombardments or waves of bombers: That’s how wars in the Pacific were fought 70 years ago. Instead, 1200 cruise and ballistic missiles rise from heavy vehicles on the Chinese mainland.

Taiwan’s modest missile defense network—a scattered deployment of I-Hawk and Patriot interceptors—slams into dozens of incoming warheads. It’s a futile gesture. The mass raid overwhelms the defenses as hundreds of Chinese warheads blast the island’s military bases and airports. Taiwan’s air force is grounded, and if China maintains air superiority over the Taiwan Strait, it can launch an invasion. Taiwanese troops mobilize in downtown Taipei and take up positions on the beaches facing China, just 100 miles to the west. But they know what the world knows: This is no longer Taiwan’s fight. This is a battle between an old superpower and a new one. Ever since 1949, when Nationalist forces retreated to Taiwan following the Communist victory in the Chinese Civil War, Beijing has regarded the island as a renegade province of the People’s Republic. Now, in 2015, only the United States can offer Taiwan protection from China’s warplanes and invasion fleet.

The nearest aircraft carrier is the USS Nimitz, which had just left the Japanese port of Yokosuka on Tokyo Bay when the missiles landed on Taiwan. Although Beijing has promised to attack anyone who interferes with this “internal security operation,” the U.S. president orders the Nimitz and its escorts to the Taiwan Strait. The Nimitz battle group needs at least two days for the carrier to reach the strait, more than 1300 miles southwest. The closest other carrier group, near Pearl Harbor, is six days out.

Until the Nimitz arrives, it’s up to Kadena Air Base in Okinawa, 400 miles northeast of Taiwan, to defend the island. By 0515 hours, Air Force pilots are taking off in 40 F-15E fighters to conduct combat air patrols over the island. Half of them are airborne when Kadena comes under attack. First, error messages begin popping up on computer screens. Modern air defense systems share sensor information and targeting data to better coordinate their actions, but this connection is going to become a liability. An army of hackers operating throughout China swarms the base’s networks, tying up communications with gibberish and cluttering the digital screens of radar operators with phony and conflicting data.

Next, early-warning satellites detect the infrared bloom of 25 ballistic missiles launched from the Chinese mainland. Five detonate in orbit, shredding American communication and imaging satellites. While not a technical first—both the U.S. and China have knocked down satellites—it’s the first outbreak of a hot war in space, and it partially blinds U.S. forces.

The 20 remaining missiles re-enter the atmosphere over Okinawa. Kadena’s Patriot batteries fire missiles in response, but they are off-network and in disarray—10 missiles are struck by multiple interceptors, but an equal number slip through the defensive screen and hit ­Kadena. Some of the GPS-guided warheads contain bomb­lets that crater the base’s two runways. Others air-burst over the base, devastating barracks, radar arrays and hangars. Kadena is far from destroyed, but until its runways can be repaired, it is out of the fight. The F-15s on the way to Taiwan must bank for Guam, 1300 miles southeast—they have the range to reach the base there, but only Kadena is close enough to stage efficient combat patrols. Also, F-22 stealth fighters based at Hickam Air Force Base, Hawaii, now cannot land on the base’s shattered runways and reinforce the F-15s. With Kadena’s satellites gone, the Nimitz and its flotilla of eight escorts, including Aegis-guided missile destroyers and a pair of submarines, are steaming toward an enemy possessing one of the world’s largest submarine fleets and an arsenal of land-, air- and sea-launched antiship missiles.

About 8 hours after the mass raid on Taiwan, klaxons start blaring aboard the Nimitz and her escorts. There are more missiles in the air, this time headed straight for the carrier group. The Taiwan Strait is still more than 1000 miles away, but the war has come to the Nimitz. Skimming the surface of the Pacific are four supersonic missiles flying faster than their own roar.

Read more…