The Golden Gate Bridge in San Francisco has been making strange noises for the past year. Photo: Reuters Strange sound According to The Guardian (UK), in a windy tunnel in the southwest of Ontario, California, a team of acoustic and aerodynamic experts is testing on a model of the railing of the Golden Gate Bridge. Experts have contracted to solve the mystery of a strange humming sound emanating from the famous bridge in San Francisco over the past year. Some residents living nearby feel extremely uncomfortable hearing this noise. Accordingly, this mysterious sound appears only on days with strong winds. It has been compared by some to the “ghost harmonica”, “the sound of the monks chanting”, or the “wheezing sound”. This strange sound quickly became a thrilling story in San Francisco. A music producer has put it on a track of existential fear. Some amused people consider it the “mellow song” of the bridge, others say the sound is very “creepy” and they can’t stand it. aliens made this noise. “It sounds like a noise I can imagine prison guards use to torture prisoners,” one social media user shared. But whether San Francisco people love it or hate it, engineers will get rid of it next summer. Video: The mysterious sound from the Golden Gate Bridge (Source: Youtube): The cause of the mysterious sound After residents of the city began complaining about the noise in June 2020, authorities began an investigation. They monitor this sound and use instruments to measure the vibration of the humming. They found that the sound usually comes out at 440 hz, matching the note of A. The noise occurs when the wind hits the new balustrade, installed from a slight angle, slightly north or south, relative to the normal wind from the west. “After carefully studying the phenomenon, we determined the sound was coming from the new aerodynamic railing that we installed on the west side,” said Paolo Cosulich-Schwartz, a spokesman for the Bridge Management Board. . “It is part of the Golden Gate Bridge upgrade, designed to protect the bridge by allowing it to withstand sustained high winds of up to about 160 km/h.” He said new, thinner railings have been installed to ensure the bridge doesn’t have the same problems as the ill-fated Tacoma Narrows Bridge in Washington. The bridge shook violently in the wind, then collapsed in 1940, shortly after a few months of construction. “So we had to go ahead with this project. As climate change leads to more extreme weather events, it is imperative that the construction be completed as soon as possible,” said Cosulich-Schwartz, adding that the building was retrofitted with wind resistance in 2016. last year at a cost of $12 million. A study conducted in 2013 showed that the maximum wind speed that the bridge can withstand is 111 km/h. Since its inauguration, the Golden Gate Bridge has been closed 3 times due to bad weather conditions, in 1951 with strong winds of 111 km/h, in 1982 with strong winds of 113 km/h and in 1983 with strong winds of 121 km /H. Fortunately, no damage occurred. So bridge engineers looked for newer thin slats that would allow the bridge to withstand winds of up to 160km/h. They just didn’t expect the bars to create such a “symphony”. Wind gusts of 160km/h are only possible in the event of a tornado, hurricane or tropical storm, said Warren Blier, a senior science official with the National Weather Service. The Golden Gate Bridge has been closed 3 times in its history due to strong winds. Photo: AP Attempts to silence the noise Meanwhile, engineers are determined to find a way to fix the problem. At engineering firm RWDI, an hour west of Toronto, a model of a bridge the size of a conference room was built in a wind tunnel. Engineers are testing various wind speeds and modifications to see if they can quell the noise. However, in the city of San Francisco, not everyone wants this noise to go away. A local blogger even created a sound list around the Golden Gate Bridge to help listeners sleep better. “I love the sound,” says Brianne Howell, a resident of west San Francisco, who shot a video of the bridge humming on one of her regular walks along the coast. “It reminds me of the weird sound in a horror movie. It’s sad to have to remove it.” Construction of the Golden Gate Bridge was started in 1933 and completed in 1937. The bridge spanning the Pacific Ocean, connecting the city of San Francisco with Marin County, has a length of up to 2,700 meters and a ground height of nearly 90 meters. . The Golden Gate Bridge is not only famous for its arduous construction process, but is also known as a tourist magnet of the United States.

Tulip turbines are “planted” in urban areas, on the rooftops of houses in Amsterdam, the Netherlands Traditional wind turbines are often located in the sea, are huge in size, make loud noises, can harm birds, and it is important that very strong winds are needed to generate electricity. The new tulip-shaped design overcomes all of the above shortcomings, it only needs a normal wind to generate enough electricity for a family to use comfortably all day. Israeli-American Dr Daniel Farb, the inventor of the tulip turbine, said the unique aerodynamic design makes the turbines quiet, efficient and capable of generating more than 50% of the electricity in clusters. Shaped like glossy flowers in a variety of colors and sizes (1m, 3m and 6m high), the tulip turbines are designed to double duty as electricity generation and artistic decoration on the rooftops. home, shopping mall, school… In addition, a solar system combined with tulip turbines could reduce overcrowding during the late afternoon peaks in many parts of the world when sunlight goes out and strong winds pick up.

Yamaha R7 – the rival of the upcoming Kawasaki Ninja ZX-6R. Recently, motorcycle company Yamaha Japan has released a video hinting that a new R series motorcycle from the company is coming. While no details regarding the model were revealed in the footage, speculations have quickly suggested that the upcoming model will be the Yamaha R7. Now, the Japanese company has released a second video that shows a glimpse of the new sportbike and confirms that the new motorcycle model will be announced globally on May 18. Through a series of leaked images, the Yamaha R7 – a rival to the Kawasaki Ninja ZX-6R – is actually the successor to the Yamaha R6. Although it is a new motorcycle, the R7 still carries the silhouette of the R6. The front appearance of the new Yamaha R7 has a projector headlight placed in the center, reminiscent of the new Yamaha MT-07. On either side of the headlights are LED DRLs and a pair of small air intakes. The crankset of the car is aerodynamically designed and is kept neatly with only the R7 logo. In terms of equipment, it can be seen that the Yamaha R7 will have a USD fork in front and a monoshock at the rear for shock absorption. The brake unit will include two rotors in the front and one in the rear. This model will likely be equipped with a completely new digital instrument cluster along with some important electronic supports for the driver such as traction control, different driving modes, anti-lock braking ABS, … As for the engine, it is likely that the new Yamaha R7 will be equipped with a 689cc engine block, producing 73.4 PS of power and 67 Nm of maximum torque.

Ferrari will launch a new supercar Similar to Ferrari cars, the most striking feature lies in the “heart” itself: in this case the latest generation of the legendary 65 ° V12 engine from Maranello, delivering the highest output compared to any Ferrari commercial car engine – 830 cv, engine rpm at 9,500 rpm, again the highest of any Ferrari. New generation Ferrari tail One of the most prominent upgrades on this new model is the dramatic change of the aerodynamics done through in-depth research. Working closely with the Ferrari Design Center, the aerodynamics researchers have applied innovative solutions that deliver impressive design with unmatched performance in a commercial vehicle. With the re-design of the entire vehicle’s aerodynamics, maximizing the downforce: from the new front inlet, rear diffuser and exhaust configuration to the signature design. the right of the rear glass – where eddy winds are handled – every change in the car follows Ferrari’s core motto: form must always come with function. New generation Ferrari cabin The interior compartment design still reflects many similar lines on the 812 Superfast, retaining the look of the center console and the control cluster on the door sill, including a distinctive decorative motif. Along with other interior accents, the door cladding has been redesigned to reduce weight, and with it the new design of the H-shaped central gearshift control cluster creates a canopy. sportier, more modern, strongly demonstrating the spirit of sports car racing.

In this announcement, Ferrari said that its latest supercar will continue to enhance the experience of a berlinetta with a front-wheel drive, which is already too successful of the company. Powering the car is the V12 engine block with the legendary 65-degree tilt angle. However, this engine has now been tweaked to produce 830 hp and top speed of 9,500 rpm, making it Ferrari’s fastest and most powerful engine. In the exterior, Ferrari’s design has been minimalistic and optimized to create the cleanest and optimal airflow through the car. Behind, the glass trunk has been replaced with a monolithic aluminum sheet and swirling details. Although the main focus is on performance, the front end is still adding a number of details to help customers easily use to personalize their car, typically the carbon fiber panel placed across the bonnet. -pô. Thanks to this cladding, the bodywork feels wider while the front is shorter, giving it a better design distribution. In addition, some additional aerodynamic details such as the air cavity below, the extended bumper as well as the rear with additional aerodynamic details are also highlights in this area. In terms of technology, Ferrari equips this car with four-wheel steering system. As a result, the driver will feel the sharpness and precision of every cornering or lane change. The car is also equipped with the company’s newest, seventh-generation horizontal slide control system. Finally there is the spacious appearance of carbon fiber, which helps to reduce the overall weight of the car. Step inside, the cockpit still has the same design as the previous 812 Superfast or 812 GTS. The redesigned door cladding reduces weight, and in the center console, a new “H-gate” shift lever will be available to replace the push-button input buttons as before. The manual sports seats also get a completely new, classic surface texture and bold racing spirit. However, the details as well as the name and limited number of this model are still kept confidential and will be announced on May 5 here.

After the launch of the Porsche Taycan rear-wheel drive in Malaysia earlier this year, Sime Darby Auto Performance (SDAP), the Porsche brand distributor in the country, recently launched the powerful 911 Turbo S. In the Malaysian market, the most powerful version of the current 911 will be priced at RM 2,235,463, equivalent to about VND 12.47 billion. This price includes tax but does not include vehicle registration. Similar to the Vietnamese market, the price above of the Porsche 911 Turbo S does not include the price of options. In Vietnam, this model has a starting price of VND 15.33 billion. According to Porsche, the new generation 911 Turbo S 992 is the most powerful 911 ever introduced to date. Both the Coupe and Cabriolet variants get a new 3.8-liter boxer engine with two VTG turbochargers, producing 478 kW (650 PS), a 51 kW (70 PS) increase over its predecessor. Maximum torque is now 800 Nm (50 Nm increase). The exclusive Porsche 8-speed dual-clutch (PDK) automatic transmission for the Turbo version shortens the acceleration time from 0 to 100 km / h to 2.7 seconds (0.2 seconds faster), in when the constant top speed reaches 330 km / h. The dimensions of the 911 Turbo S are significantly refined to increase performance: The body is 45 mm wider on the front axle (1,840 mm) and the overall width is 1,900 mm at the rear (20 mm increase). Changing tire width, increasing aerodynamics and using a combination of tires of different sizes for increased flexibility and sportiness: Tire width increased by 42 mm on the front axle and 10 mm on the rear axle. The active aerodynamic system includes the front cooling air vents, in addition to the wider rear side designed to increase compression. For the first time, the 911 Turbo S version transmits traction to the road surface through a combination of two different sizes: 20 inch size with a special parameter of 255/35 in the front wheel and 21 inch size with parameters 315/30 in rear wheel. New equipment options emphasize the sportiness of the all-wheel drive 911. The addition of Porsche Active Suspension Management (PASM) has been lowered by 10 mm and a sports exhaust system with custom flip doors for signature sounds. The overall harmonious design is perfectly balanced with steering feel, aerodynamics and sportiness, making it an ideal choice for everyday use and on the track. This new generation’s performance leap is especially noticeable when accelerating 0 to 200 km / h in 8.9 seconds, the new 911 Turbo S version is 1 second faster than its predecessor. Improved Porsche Traction Management (PTM) optimizes torque distribution to the front wheels of the transmission, up to 500 Nm. The new generation’s standard PASM chassis is more sporty. The interior uses high quality and sporty materials. The 10.9-inch PCM center screen is newly arranged to help the driver always focus and manipulate quickly. Other prominent elements include the GT sports steering wheel, the Sport Chrono package with the new Porsche Track Index application and the BOSE Surround Sound System.

The engine on the special Ferrari 812 Superfast is, without a doubt, the naturally aspirated V12 with the highest capacity of all Ferrari’s regular engine lineup at 818 hp. Not stopping there, the maximum number of rpm this engine reaches is still at an unbelievably high 9,500 rpm – also an unprecedented parameter on regular Ferrari cars. According to Ferrari, many engine components have been upgraded while the engine valve mechanism has been optimized and the exhaust system is renewed, which promises to bring performance ” there is no precedent in the V12 supercar segment. The entire chassis system on this project has also been modified to increase the sensitivity, flexibility when the user steers when allowing all 4 wheels to turn independently. The Side Slip Control anti-slip system is also a software upgrade compared to the regular Ferrari 812 Superfast. At first glance at the new Ferrari 812 Superfast, it’s hard to see the entire body frame that has been reworked to optimize the aerodynamics and downward momentum further. A series of additional details such as the front air cavity, large rear diffuser and new exhaust mouths, and the rear window are replaced with a monolithic aluminum panel. The weight of the car is made lower than the regular Ferrari 812 Superfast, but it’s unclear exactly how much. Inside the car cabin, the entire interior area of ​​the door has been reworked to minimize weight, the gear lever switches to the H-shaped mini 3 split-lever interface like Roma. The special Ferrari 812 Superfast price was only announced on May 5, but users may find it difficult to spend less than 7 figures. Reference: Carscoops

PAK DA designs developed by Tupolev Office of Russia. Photo: Ministry of Defense of Russia In early April, the Russian Ministry of Defense approved the final design for the sixth-generation stealth bomber, called the “Modern Long Range Aviation Complex” (identified as in Russian is PAK DA). This aircraft designed and developed by the Tupolev Office places priority on stealth and long-range weapon use. Currently, the office is building a full-size, full-scale PAK DA prototype aircraft. PAK DA is designed based on the aerodynamic principle of “flying wings”, without the tail part, the fuel tank is separated from the wing, can reach subsonic speeds of 1,190 km / h. The PAK DA is expected to replace the Tu-160 strategic bomber developed in the Soviet era. The new Russian aircraft model uses the latest stealth technology, alloys and synthetic materials. The main weapon system equipped on the PAK DA includes long-range cruise missiles and supersonic missiles using modern technology, capable of escaping enemy radar. According to a professor at the Russian Military Science Academy Vadim Kozulin, all the equipment on board is automated at the highest level. Engineers are testing operating the PAK DA in unmanned mode. In addition, this latest generation Russian bomber is said to have the control feature of other groups of unmanned aircraft (UAVs). The highlight of the PAK DA design is the priority in stealth technology, combined with the tactic of using long-range weapons. “The Russian Air Force is currently armed with long-range missiles such as the X-555 and X-101 with a range of up to 5,000 km, which is why there is no need to use traditional long-range bombers. can carry out attacks without leaving the Russian border, still within the defense of the air defense system, “said Mr. Kozulin. The PAK DA is expected to enter service in the Russian army by 2027. The minimum lifespan of this strategic bomber is not less than 12 years. After technical maintenance, can increase the operating life up to 21 years.