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747-8F thrust reverser cycle after maintenance. GEnx cascade system... sleeve slides back, cascades open, blocker doors close the fan duct and the air gets redirected forward. Clean deploy.

Fahad Naim

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50,300 views • 8 days ago •via X (Twitter)

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GE90 thrust reverser ops test from the side and rear. You can see the blocker doors swinging into place. That big fan sleeve slides aft, cascades open up, and those blocker doors fold in to shut off the normal bypass path. Fan air gets forced forward through the cascades instead of going straight out the back. Core still pushes aft like normal.

GE90 thrust reverser ops test from the side and rear. You can see the blocker doors swinging into place. That big fan sleeve slides aft, cascades open up, and those blocker doors fold in to shut off the normal bypass path. Fan air gets forced forward through the cascades instead of going straight out the back. Core still pushes aft like normal.

Fahad Naim

32,034 views • 19 days ago

Let me show you the thrust reverse ops check after performing maintenance on a GE90. The outer sleeve translates rearward, exposing the cascade vanes. At the same time the blocker doors inside the bypass duct deploy to block the normal rearward airflow. All that fan air gets redirected forward through the cascades... that’s reverse thrust helping the aircraft stop. If you’ve only seen it from the cabin or side, take a look at the back view in the video to get the full picture.

Let me show you the thrust reverse ops check after performing maintenance on a GE90. The outer sleeve translates rearward, exposing the cascade vanes. At the same time the blocker doors inside the bypass duct deploy to block the normal rearward airflow. All that fan air gets redirected forward through the cascades... that’s reverse thrust helping the aircraft stop. If you’ve only seen it from the cabin or side, take a look at the back view in the video to get the full picture.

Fahad Naim

33,270 views • 4 months ago

As the CFM LEAP engine shuts down, you can hear the distinctive “whoosh” sound followed by a gush of air. That is the Reverse Bleed System (RBS) at work. During normal operation, a significant amount of fuel remains unpurged in the system after engine shutdown. This residual fuel, located near or within the hot section, vaporizes due to high temperatures and deposits carbon (coke) on the fuel nozzles. Over time, nozzle coking leads to several operational and maintenance issues, including loss of thrust, reduced engine efficiency due to incomplete combustion, accelerated deterioration of hot-section components (combustor and High-Pressure Turbine), engine start failures, potential engine stalls, and increased unscheduled engine removals. The Reverse Bleed System (RBS) prevents fuel nozzle coking by automatically introducing cool air from the core compartment into the engine core flowpath after shutdown. This effectively lowers the fuel nozzle temperature below the coking threshold. RBS can operate for a maximum of 1 hour, and its effectiveness depends on ambient conditions (especially ambient temperature) and the total duration it runs. The last flight of the day contributes the most to fuel nozzle coke accumulation because of the extended dwell time at the gate. By actively managing post-shutdown thermal conditions, RBS significantly reduces coking-related problems, improves engine reliability, and lowers long-term maintenance costs. Now, also coming soon to the CFM56

As the CFM LEAP engine shuts down, you can hear the distinctive “whoosh” sound followed by a gush of air. That is the Reverse Bleed System (RBS) at work. During normal operation, a significant amount of fuel remains unpurged in the system after engine shutdown. This residual fuel, located near or within the hot section, vaporizes due to high temperatures and deposits carbon (coke) on the fuel nozzles. Over time, nozzle coking leads to several operational and maintenance issues, including loss of thrust, reduced engine efficiency due to incomplete combustion, accelerated deterioration of hot-section components (combustor and High-Pressure Turbine), engine start failures, potential engine stalls, and increased unscheduled engine removals. The Reverse Bleed System (RBS) prevents fuel nozzle coking by automatically introducing cool air from the core compartment into the engine core flowpath after shutdown. This effectively lowers the fuel nozzle temperature below the coking threshold. RBS can operate for a maximum of 1 hour, and its effectiveness depends on ambient conditions (especially ambient temperature) and the total duration it runs. The last flight of the day contributes the most to fuel nozzle coke accumulation because of the extended dwell time at the gate. By actively managing post-shutdown thermal conditions, RBS significantly reduces coking-related problems, improves engine reliability, and lowers long-term maintenance costs. Now, also coming soon to the CFM56

Arjun Singh

53,447 views • 3 months ago

A pickle jar can function as a tiny jet engine. The setup is simple: a glass jar with a small hole in the lid holds a volatile fuel like methanol, which evaporates to create a fuel and air mixture inside. A flame brought to the hole ignites it, and the cycle begins. Here is what happens in each pulse. Combustion sends a sharp pressure spike through the jar, forcing hot gas out the lid hole as thrust. The escaping gas creates a brief partial vacuum inside, which pulls fresh air back in through the same hole. Residual heat ignites the new mixture automatically, and the cycle repeats dozens to hundreds of times per second. The jar and hole act as a resonant cavity, which is why it pulses instead of burning steadily. A single opening cannot handle exhaust and intake at the same time, so the system locks into a natural rhythm. It produces almost no real thrust, but it is a clear window into how actual pulsejet engines work, and the physics on display are the same ones used in real aerospace propulsion. Follow for more!

A pickle jar can function as a tiny jet engine. The setup is simple: a glass jar with a small hole in the lid holds a volatile fuel like methanol, which evaporates to create a fuel and air mixture inside. A flame brought to the hole ignites it, and the cycle begins. Here is what happens in each pulse. Combustion sends a sharp pressure spike through the jar, forcing hot gas out the lid hole as thrust. The escaping gas creates a brief partial vacuum inside, which pulls fresh air back in through the same hole. Residual heat ignites the new mixture automatically, and the cycle repeats dozens to hundreds of times per second. The jar and hole act as a resonant cavity, which is why it pulses instead of burning steadily. A single opening cannot handle exhaust and intake at the same time, so the system locks into a natural rhythm. It produces almost no real thrust, but it is a clear window into how actual pulsejet engines work, and the physics on display are the same ones used in real aerospace propulsion. Follow for more!

Mechanical Knowledge

131,156 views • 5 months ago

Knock knock! ✊ IT'S THE #SCARYDOORS COMMUNITY EVENT! 🚪 ♦️ There are 20 rewards hidden behind doors, including the Manga Kenji Hypercharge Skin for FREE! ♦️ Only 10 doors can be opened in total, one per day, except on the last day, when you can open 3 doors at the same time! HOW TO OPEN A DOOR??? 🔸 Complete 80 Million Quests every day and earn a key that opens a door 🔸 To pick a door, the community must vote for it in the in-game News and the door with the highest votes will be opened the next day! 🔸 Doors and rewards reveal will be shown with pre-recorded videos in our social media channels each day at 8:00 am UTC SPECIAL GIVEAWAY!!! 😱 10 players will win 1 MILLION GEMS! 👉 Participate by sharing on social media a screenshot of the door you're voting for and use the hashtags #ScaryDoors and #BrawlStars! 🍀 The more days you share your vote, the higher the chances of getting picked! Winners will be picked after the event ends on November 5th! PS(T): since today's maintenance happened after the Daily Wins refresh, everyone gets 1 Starr Drop, 1 Angelic Starr Drop, 1 Demonic Starr Drop and 1 Sushi ALL FREE! 👍

Knock knock! ✊ IT'S THE #SCARYDOORS COMMUNITY EVENT! 🚪 ♦️ There are 20 rewards hidden behind doors, including the Manga Kenji Hypercharge Skin for FREE! ♦️ Only 10 doors can be opened in total, one per day, except on the last day, when you can open 3 doors at the same time! HOW TO OPEN A DOOR??? 🔸 Complete 80 Million Quests every day and earn a key that opens a door 🔸 To pick a door, the community must vote for it in the in-game News and the door with the highest votes will be opened the next day! 🔸 Doors and rewards reveal will be shown with pre-recorded videos in our social media channels each day at 8:00 am UTC SPECIAL GIVEAWAY!!! 😱 10 players will win 1 MILLION GEMS! 👉 Participate by sharing on social media a screenshot of the door you're voting for and use the hashtags #ScaryDoors and #BrawlStars! 🍀 The more days you share your vote, the higher the chances of getting picked! Winners will be picked after the event ends on November 5th! PS(T): since today's maintenance happened after the Daily Wins refresh, everyone gets 1 Starr Drop, 1 Angelic Starr Drop, 1 Demonic Starr Drop and 1 Sushi ALL FREE! 👍

Brawl Stars

923,146 views • 9 months ago

This was such a close call that all simulations on it resulted in a crash [and would have likely been one of the worst in history had it been so] August 9 1978: Olympic Airways Flight 411, a B-747 with 418 aboard, had a near miss over Athens (Greece). Due to crew actions on takeoff, engine thrust was reduced drastically. The jet lost significant altitude and speed: it flew as low as 153 ft and at a speed of 158 kts before the crew recovered. Boeing inquiry stated the jet lost power after crew mistakenly turned off the engine´s water injection system, reducing thrust, which led to a loss of altitude and speed that put the plane near an irrecoverable stall. To get an idea of how close this came to a major disaster (a 747 loaded with fuel going down in a major city), all of Boeing´s simulations of the scenarios presented in the flight resulted in a crash. Video is an excerpt from an analysis by Mentour Pilot, well worth a check – you can see the full video on the link here

This was such a close call that all simulations on it resulted in a crash [and would have likely been one of the worst in history had it been so] August 9 1978: Olympic Airways Flight 411, a B-747 with 418 aboard, had a near miss over Athens (Greece). Due to crew actions on takeoff, engine thrust was reduced drastically. The jet lost significant altitude and speed: it flew as low as 153 ft and at a speed of 158 kts before the crew recovered. Boeing inquiry stated the jet lost power after crew mistakenly turned off the engine´s water injection system, reducing thrust, which led to a loss of altitude and speed that put the plane near an irrecoverable stall. To get an idea of how close this came to a major disaster (a 747 loaded with fuel going down in a major city), all of Boeing´s simulations of the scenarios presented in the flight resulted in a crash. Video is an excerpt from an analysis by Mentour Pilot, well worth a check – you can see the full video on the link here

Francisco Cunha

88,694 views • 10 days ago

How China washes its High Speed Trains everyday. They all shines as if brand new. High-speed trains are treated with the same care as luxury cars: they even have automated washing lines. A whole train can be cleaned in minutes. The wash stations are hidden inside the maintenance yards, and once a train rolls in at night, sensors activate the system automatically as it glides forward at just a few kilometers per hour. First comes the high-pressure rinse. Then a layer of neutral cleaning solution. No brushes, no blind spots, no scraping—everything is done with precision. A final cascade of clean water brings back the glossy finish. The entire process can be completed in five minutes. It isn’t just about looking good. A clean, polished surface reduces air resistance, improves energy efficiency, and even the wastewater is recycled. It’s an industrial choreography built for both beauty and engineering logic. Now compare this to the United States. While China washes its high-speed trains every night, keeping them sleek, spotless, and aerodynamic, America still relies on Amtrak’s aging fleet—trains that crawl along antique tracks, often slower than cars, and long overdue for modernization. Many Amtrak trains run on century-old bridges and tunnels, with speeds capped not by engineering ambition but by outdated infrastructure. Cleanliness varies, maintenance is patchwork, and the idea of a dedicated automated wash line feels like science fiction.

America-China Watcher

81,468 views • 8 months ago

In June 1937 at Neuhardenberg, pilot Erich Warsitz (posibly the first jet pilot) ignited the von Braun Liquid Fuel Rocket Engine on his Heinkel He 112 after climbing to altitude and shutting down the Jumo piston engine. Smoke and fire quickly filled the cockpit due to exhaust flowing back into the fuselage. Despite the wheels-up landing and having the fuselage on fire, it proved to official circles that an aircraft could be flown satisfactorily with a back-thrust system through the rear without causing an aircraft to flip or become uncontrollable. It convinced the German Air Ministry (RLM) that rocket-powered flight was feasible, leading directly to the development of the purpose-built Heinkel He 176.

In June 1937 at Neuhardenberg, pilot Erich Warsitz (posibly the first jet pilot) ignited the von Braun Liquid Fuel Rocket Engine on his Heinkel He 112 after climbing to altitude and shutting down the Jumo piston engine. Smoke and fire quickly filled the cockpit due to exhaust flowing back into the fuselage. Despite the wheels-up landing and having the fuselage on fire, it proved to official circles that an aircraft could be flown satisfactorily with a back-thrust system through the rear without causing an aircraft to flip or become uncontrollable. It convinced the German Air Ministry (RLM) that rocket-powered flight was feasible, leading directly to the development of the purpose-built Heinkel He 176.

Aviation Archive - Tim Farmer

85,884 views • 4 months ago

Johnny "Gabagool" Aubry was forced to close his Somerdale Cold Cuts deli in South Jersey earlier this month because of a copper theft. After days of repairs and rebuilding, the popular neighborhood deli is back in business. Customers began arriving before the doors officially opened Thursday morning, eager to support the family-owned deli after thieves stole the copper wiring that powered the store's refrigeration system. While the deli has reopened, not every item is back on the shelves just yet. Aubry says inventory will continue to be restocked as deliveries arrive throughout the end of the week. Head to the link in our bio for more on Somerdale Cold Cuts' reopening.

Johnny "Gabagool" Aubry was forced to close his Somerdale Cold Cuts deli in South Jersey earlier this month because of a copper theft. After days of repairs and rebuilding, the popular neighborhood deli is back in business. Customers began arriving before the doors officially opened Thursday morning, eager to support the family-owned deli after thieves stole the copper wiring that powered the store's refrigeration system. While the deli has reopened, not every item is back on the shelves just yet. Aubry says inventory will continue to be restocked as deliveries arrive throughout the end of the week. Head to the link in our bio for more on Somerdale Cold Cuts' reopening.

CBS Philadelphia

48,610 views • 27 days ago

🇯🇵 The Japan Maritime Self Defense Force test ship JS Asuka has begun maritime trials of a 100 kW high energy shipborne laser system. The platform is now equipped with a counter drone radar suite, indicating a clear focus on unmanned aerial threat interception and close range air defense. Images show the large protective housing doors open, revealing a laser module reportedly equivalent in size to two 40 foot containers. This marks a significant step in Japan’s directed energy weapons development and operational testing at sea. How soon could we see this capability deployed across frontline vessels?

🇯🇵 The Japan Maritime Self Defense Force test ship JS Asuka has begun maritime trials of a 100 kW high energy shipborne laser system. The platform is now equipped with a counter drone radar suite, indicating a clear focus on unmanned aerial threat interception and close range air defense. Images show the large protective housing doors open, revealing a laser module reportedly equivalent in size to two 40 foot containers. This marks a significant step in Japan’s directed energy weapons development and operational testing at sea. How soon could we see this capability deployed across frontline vessels?

Defense Intelligence

576,879 views • 6 months ago

#WATCH | Delhi: Lok Sabha LoP and Congress MP Rahul Gandhi says, "Even after you have an education, you become a doctor, you become a lawyer, you learn something, you're suddenly told that the doors that should be open to you, what your country and your government owes you- a livelihood, a job, is closed. So manufacturing is closed. Look around you, you'll see there are only Chinese products. Entrepreneurship is closed. Take a look at who gets the money from the banks. Two or three large companies get all the money from the banks. So young person who wants to be an entrepreneur cannot. Corporate job, AI is destroying it, the IT sector. Public sector being privatized. The only choice they have is a Sarkari job. So you give them one door, you close all the doors, then you rig that system and make it unbelievably expensive. And then you expect they won't be outside. Which world are you living in?..."

#WATCH | Delhi: Lok Sabha LoP and Congress MP Rahul Gandhi says, "Even after you have an education, you become a doctor, you become a lawyer, you learn something, you're suddenly told that the doors that should be open to you, what your country and your government owes you- a livelihood, a job, is closed. So manufacturing is closed. Look around you, you'll see there are only Chinese products. Entrepreneurship is closed. Take a look at who gets the money from the banks. Two or three large companies get all the money from the banks. So young person who wants to be an entrepreneur cannot. Corporate job, AI is destroying it, the IT sector. Public sector being privatized. The only choice they have is a Sarkari job. So you give them one door, you close all the doors, then you rig that system and make it unbelievably expensive. And then you expect they won't be outside. Which world are you living in?..."

ANI

74,350 views • 28 days ago

🚨WHOA!!! Gravity Just Got Outmatched… Watch a C-17 Drop Out of the Sky Using Reverse Thrust Most people think giant cargo aircraft descend slowly in wide lazy circles. Not the American 🇺🇸 C-17. What you’re seeing in this footage is one of the most aggressive controlled descents ever engineered into a military aircraft. The C-17 Globemaster can actually deploy thrust reversers while still in the air… something almost no other jet transport can safely do. When those massive engines flip into reverse thrust, the physics of the aircraft changes instantly. Instead of the engines pushing the aircraft forward… they begin fighting the forward motion of the airplane. The result is dramatic. The aircraft can transition from flying nearly parallel to the horizon… to a steep nose-down descent that looks almost perpendicular compared to the Earth below. Pilots can drop altitude incredibly fast… going from high cruising altitude to landing approach in just a couple minutes. Why does this matter? Because the C-17 was built for battlefield logistics. It was designed to fly into dangerous airspace, descend rapidly to avoid threats, land on short or rough runways, unload equipment or troops, and get back into the air before anyone has time to react. That rapid descent capability allows the aircraft to minimize time exposed to enemy radar or missile threats. The moment the thrust reversers are disengaged, the aircraft stabilizes instantly and transitions back into normal controlled flight for landing. It’s a perfect example of American aerospace engineering. Four massive turbofan engines… flight computers… and aerodynamics working together to make a 585,000-pound aircraft move like a precision instrument in the sky. For people who have never seen reverse thrust used mid-air before… this footage is a rare look at how military airlift aircraft operate when seconds matter. It’s one of the coolest demonstrations of aviation physics you’ll ever see. #SilentMajoritySpeaks #AStoneGroove

🚨WHOA!!! Gravity Just Got Outmatched… Watch a C-17 Drop Out of the Sky Using Reverse Thrust Most people think giant cargo aircraft descend slowly in wide lazy circles. Not the American 🇺🇸 C-17. What you’re seeing in this footage is one of the most aggressive controlled descents ever engineered into a military aircraft. The C-17 Globemaster can actually deploy thrust reversers while still in the air… something almost no other jet transport can safely do. When those massive engines flip into reverse thrust, the physics of the aircraft changes instantly. Instead of the engines pushing the aircraft forward… they begin fighting the forward motion of the airplane. The result is dramatic. The aircraft can transition from flying nearly parallel to the horizon… to a steep nose-down descent that looks almost perpendicular compared to the Earth below. Pilots can drop altitude incredibly fast… going from high cruising altitude to landing approach in just a couple minutes. Why does this matter? Because the C-17 was built for battlefield logistics. It was designed to fly into dangerous airspace, descend rapidly to avoid threats, land on short or rough runways, unload equipment or troops, and get back into the air before anyone has time to react. That rapid descent capability allows the aircraft to minimize time exposed to enemy radar or missile threats. The moment the thrust reversers are disengaged, the aircraft stabilizes instantly and transitions back into normal controlled flight for landing. It’s a perfect example of American aerospace engineering. Four massive turbofan engines… flight computers… and aerodynamics working together to make a 585,000-pound aircraft move like a precision instrument in the sky. For people who have never seen reverse thrust used mid-air before… this footage is a rare look at how military airlift aircraft operate when seconds matter. It’s one of the coolest demonstrations of aviation physics you’ll ever see. #SilentMajoritySpeaks #AStoneGroove

A Gene Robinson

1,045,647 views • 5 months ago

CYBERTRUCK JUST PARKS ITSELF AT A SUPERCHARGER LIKE IT'S SHOWING OFF The Cybertruck moved in full self driving mode and the scene felt like a quiet flex as it rolled toward seven open stalls without anything pre selected. The truck scanned ahead and lined itself up with a confidence that made the moment feel strangely personal while the question hung in the air about whether it could find a stall and settle into place. It backed in smoothly and the precision looked almost casual. Cybertruck eased close without hesitation and finished the move with a clean perfect back in that found the Supercharger entirely on its own. Source: Tesla Owners Silicon Valley

CYBERTRUCK JUST PARKS ITSELF AT A SUPERCHARGER LIKE IT'S SHOWING OFF The Cybertruck moved in full self driving mode and the scene felt like a quiet flex as it rolled toward seven open stalls without anything pre selected. The truck scanned ahead and lined itself up with a confidence that made the moment feel strangely personal while the question hung in the air about whether it could find a stall and settle into place. It backed in smoothly and the precision looked almost casual. Cybertruck eased close without hesitation and finished the move with a clean perfect back in that found the Supercharger entirely on its own. Source: Tesla Owners Silicon Valley

Mario Nawfal

127,070 views • 9 months ago

Princeton Professor shows how easy it is to hack electronic voting machines. The researchers craft a virus that exploits software flaws in the machine's operating system. Votes are silently redirected from one candidate to another, symbolizing how an attacker could "steal" an election without detection. The machine's interface shows no signs of tampering, and the final tally reflects the altered results. The hack leaves no traceable evidence on the machine itself, as the malware erases its tracks after execution. This makes post-election audits challenging without independent verification methods. The entire process takes mere minutes, emphasizing that such attacks are not the domain of nation-state actors alone but could be executed by motivated individuals or groups with moderate resources. The part that anyone could buy costs $4 dollars and this was just ONE simple demonstration from all the way back in the 2006 to 2008 era. Now it's even easier and done remotely with built-in back doors.

Princeton Professor shows how easy it is to hack electronic voting machines. The researchers craft a virus that exploits software flaws in the machine's operating system. Votes are silently redirected from one candidate to another, symbolizing how an attacker could "steal" an election without detection. The machine's interface shows no signs of tampering, and the final tally reflects the altered results. The hack leaves no traceable evidence on the machine itself, as the malware erases its tracks after execution. This makes post-election audits challenging without independent verification methods. The entire process takes mere minutes, emphasizing that such attacks are not the domain of nation-state actors alone but could be executed by motivated individuals or groups with moderate resources. The part that anyone could buy costs $4 dollars and this was just ONE simple demonstration from all the way back in the 2006 to 2008 era. Now it's even easier and done remotely with built-in back doors.

The SCIF

201,228 views • 6 months ago

The Boeing 777 was the first Boeing commercial airliner to feature a full digital fly-by-wire (FBW) flight control system. Powering this 777-300ER are the GE90 engines—the world's most powerful commercial jet engines. Each engine has a fan diameter so large that it is wider than the fuselage of a Boeing 737. After engine start, the hydraulic systems come to life, and the flight crew performs the flight control surfaces check. You can see the rudder, elevators, slats, and flaps moving before being configured for takeoff. Once both engines are running and supplying electrical and pneumatic power, the APU is shut down, causing the APU air intake door to close. B777-300ER (5Y-KZX) KQ100 Nairobi to London 8½ hrs.

The Boeing 777 was the first Boeing commercial airliner to feature a full digital fly-by-wire (FBW) flight control system. Powering this 777-300ER are the GE90 engines—the world's most powerful commercial jet engines. Each engine has a fan diameter so large that it is wider than the fuselage of a Boeing 737. After engine start, the hydraulic systems come to life, and the flight crew performs the flight control surfaces check. You can see the rudder, elevators, slats, and flaps moving before being configured for takeoff. Once both engines are running and supplying electrical and pneumatic power, the APU is shut down, causing the APU air intake door to close. B777-300ER (5Y-KZX) KQ100 Nairobi to London 8½ hrs.

Turbine Traveller

47,623 views • 1 month ago

∥—————————— 光よ照らして O light, illuminate あまねく悲しみを All the world’s sorrows ———————————∥ Anli and his companions arrive at Old Woods Village, a place open to outsiders only during the Harvest Festival. As the group and the villagers are busy preparing for the Harvest Festival, Dacatt accidentally falls from a great height. At a critical moment, a fox flies in to catch him. The fox, carrying Dacatt on its back, turns and starts to leave. Cypar takes the lead, chasing after it immediately, with Anli following close behind. As he runs, Anli vaguely senses that Cypar's recent unusual behavior might have something to do with the fox... ▼YouTube▼ ※ The [Lustrous Harvest] event will open after the maintenance scheduled for Jan 21st 23:00 (UTC+0) concludes. #Noctilucent #NoctilucentNotes #LustrousHarvest #EventComingSoon

∥—————————— 光よ照らして O light, illuminate あまねく悲しみを All the world’s sorrows ———————————∥ Anli and his companions arrive at Old Woods Village, a place open to outsiders only during the Harvest Festival. As the group and the villagers are busy preparing for the Harvest Festival, Dacatt accidentally falls from a great height. At a critical moment, a fox flies in to catch him. The fox, carrying Dacatt on its back, turns and starts to leave. Cypar takes the lead, chasing after it immediately, with Anli following close behind. As he runs, Anli vaguely senses that Cypar's recent unusual behavior might have something to do with the fox... ▼YouTube▼ ※ The [Lustrous Harvest] event will open after the maintenance scheduled for Jan 21st 23:00 (UTC+0) concludes. #Noctilucent #NoctilucentNotes #LustrousHarvest #EventComingSoon

Noctilucent: Before Dawn

13,910 views • 1 year ago

I’ve been caught cheating. Using my little blue friend to get up… and around Hong Kong. Before you jump to conclusions… I’m talking about GPS on my phone. The quiet blue dot that now guides almost every step we take. But how did it get there? The answer, in part, traces back to a tragedy involving a 747. On 1 September 1983, Korean Air Lines Flight 007, a Boeing 747 strayed into Soviet airspace after a navigational error and was shot down, killing all 269 people on board. It was a devastating event, geopolitical, human, and technological. At the time, GPS existed only as a U.S. military system. In the aftermath, President Ronald Reagan announced that once fully operational, GPS would be made available for civilian use, so that such a navigational tragedy could never happen again. That decision quietly reshaped the modern world. Today, satellites orbit 20,000km above us, transmitting timing signals so precise they can measure billionths of a second. From those signals, your phone calculates position, speed, and direction. It guides aircraft, ships, emergency services, and yes, slightly jet-lagged pilots wandering around Hong Kong. A 747 tragedy helped unlock a technology that now underpins global aviation, banking, communications, logistics, even the way we hail taxis or find coffee. That’s what fascinates me about the 747. It wasn’t just an aeroplane. It sat at the centre of moments that altered the trajectory of the world, technologically, politically, culturally. JUMBO, released in just two days, dives into this story in depth, and many others that show how the Queen of the Skies changed far more than air travel. If you enjoy the hidden threads between aviation and everyday life, this book is for you. Pre-orders are open. Nearly there. #JUMBOBook #Boeing747 #AviationHistory #KAL007 #GPS #RonaldReagan #QueenOfTheSkies #AvGeek #AviationLife #SpaceTechnology #HowItWorks #HongKong #BookLaunch #HistoryMatters

I’ve been caught cheating. Using my little blue friend to get up… and around Hong Kong. Before you jump to conclusions… I’m talking about GPS on my phone. The quiet blue dot that now guides almost every step we take. But how did it get there? The answer, in part, traces back to a tragedy involving a 747. On 1 September 1983, Korean Air Lines Flight 007, a Boeing 747 strayed into Soviet airspace after a navigational error and was shot down, killing all 269 people on board. It was a devastating event, geopolitical, human, and technological. At the time, GPS existed only as a U.S. military system. In the aftermath, President Ronald Reagan announced that once fully operational, GPS would be made available for civilian use, so that such a navigational tragedy could never happen again. That decision quietly reshaped the modern world. Today, satellites orbit 20,000km above us, transmitting timing signals so precise they can measure billionths of a second. From those signals, your phone calculates position, speed, and direction. It guides aircraft, ships, emergency services, and yes, slightly jet-lagged pilots wandering around Hong Kong. A 747 tragedy helped unlock a technology that now underpins global aviation, banking, communications, logistics, even the way we hail taxis or find coffee. That’s what fascinates me about the 747. It wasn’t just an aeroplane. It sat at the centre of moments that altered the trajectory of the world, technologically, politically, culturally. JUMBO, released in just two days, dives into this story in depth, and many others that show how the Queen of the Skies changed far more than air travel. If you enjoy the hidden threads between aviation and everyday life, this book is for you. Pre-orders are open. Nearly there. #JUMBOBook #Boeing747 #AviationHistory #KAL007 #GPS #RonaldReagan #QueenOfTheSkies #AvGeek #AviationLife #SpaceTechnology #HowItWorks #HongKong #BookLaunch #HistoryMatters

Scott Bateman MBE

20,489 views • 6 months ago

United Airlines Flight 811 (Boeing 747-122, registration N4713U) on February 24, 1989. It was a scheduled international flight from Los Angeles to Sydney, Australia, with stops in Honolulu, Hawaii, and Auckland, New Zealand. After an uneventful stop in Honolulu, the aircraft (with 337 passengers and 18 crew) took off around 1:52–1:53 a.m. local time, bound for Auckland. About 16–17 minutes after takeoff, while climbing through roughly 22,000–23,000 feet over the Pacific (around 60–100 miles south of Honolulu), the forward lower-lobe cargo door on the right side suddenly opened and separated. This caused an explosive decompression. The door swung outward with great force, tearing away a large section of the adjacent fuselage skin (roughly 10–20+ feet in key dimensions) and part of the cabin structure/floor above it. Nine passengers seated in the affected business-class rows (primarily seats in rows involving positions near the damage, such as around rows 8–12 on the right side) were ejected from the aircraft along with their seats and were lost at sea; their bodies were never recovered. Debris also damaged the two right-side engines (Nos. 3 and 4), which lost power or caught fire and had to be shut down, plus some flap and wing leading-edge damage. Several other people (including cabin crew) were injured. Captain David Cronin and the flight crew declared an emergency, turned back toward Honolulu, dumped fuel, and managed a successful emergency landing at Honolulu International Airport roughly 20–40 minutes after the event (landing around 2:30–2:33 a.m.). The remaining 346 people on board evacuated safely via slides. The aircraft sustained substantial damage but was later repaired and returned to service (re-registered as N4724U). Cause The National Transportation Safety Board (NTSB) determined the probable cause was the sudden in-flight opening of the forward cargo door, leading to the explosive decompression. This was attributed primarily to a faulty switch or wiring in the door control system that allowed electrical actuation of the latches toward the unlatched position after the door had been closed (and before or during the flight). A design deficiency in the cargo door’s locking mechanisms made them susceptible to deformation, allowing the door to unlatch even after proper latching and locking. A prior 1987 cargo-door incident on a Pan Am 747 and delayed corrective actions by Boeing and the FAA were also cited as contributing factors. An initial NTSB report leaned toward possible ground-crew latching issues (as the door was lost at sea and recovery took time), but recovery of the door from deep water (~14,000 feet) and further evidence (including a later related incident) led to the revised 1992 finding focused on the electrical/wiring fault and design weaknesses. The event is often remembered for the dramatic structural failure and successful return of the heavily damaged aircraft under difficult conditions (including storms in the area and the need to land overweight with limited systems). It prompted design and maintenance changes related to 747 cargo doors.

United Airlines Flight 811 (Boeing 747-122, registration N4713U) on February 24, 1989. It was a scheduled international flight from Los Angeles to Sydney, Australia, with stops in Honolulu, Hawaii, and Auckland, New Zealand. After an uneventful stop in Honolulu, the aircraft (with 337 passengers and 18 crew) took off around 1:52–1:53 a.m. local time, bound for Auckland. About 16–17 minutes after takeoff, while climbing through roughly 22,000–23,000 feet over the Pacific (around 60–100 miles south of Honolulu), the forward lower-lobe cargo door on the right side suddenly opened and separated. This caused an explosive decompression. The door swung outward with great force, tearing away a large section of the adjacent fuselage skin (roughly 10–20+ feet in key dimensions) and part of the cabin structure/floor above it. Nine passengers seated in the affected business-class rows (primarily seats in rows involving positions near the damage, such as around rows 8–12 on the right side) were ejected from the aircraft along with their seats and were lost at sea; their bodies were never recovered. Debris also damaged the two right-side engines (Nos. 3 and 4), which lost power or caught fire and had to be shut down, plus some flap and wing leading-edge damage. Several other people (including cabin crew) were injured. Captain David Cronin and the flight crew declared an emergency, turned back toward Honolulu, dumped fuel, and managed a successful emergency landing at Honolulu International Airport roughly 20–40 minutes after the event (landing around 2:30–2:33 a.m.). The remaining 346 people on board evacuated safely via slides. The aircraft sustained substantial damage but was later repaired and returned to service (re-registered as N4724U). Cause The National Transportation Safety Board (NTSB) determined the probable cause was the sudden in-flight opening of the forward cargo door, leading to the explosive decompression. This was attributed primarily to a faulty switch or wiring in the door control system that allowed electrical actuation of the latches toward the unlatched position after the door had been closed (and before or during the flight). A design deficiency in the cargo door’s locking mechanisms made them susceptible to deformation, allowing the door to unlatch even after proper latching and locking. A prior 1987 cargo-door incident on a Pan Am 747 and delayed corrective actions by Boeing and the FAA were also cited as contributing factors. An initial NTSB report leaned toward possible ground-crew latching issues (as the door was lost at sea and recovery took time), but recovery of the door from deep water (~14,000 feet) and further evidence (including a later related incident) led to the revised 1992 finding focused on the electrical/wiring fault and design weaknesses. The event is often remembered for the dramatic structural failure and successful return of the heavily damaged aircraft under difficult conditions (including storms in the area and the need to land overweight with limited systems). It prompted design and maintenance changes related to 747 cargo doors.

Shannon 🇺🇸I stand with America

174,174 views • 2 days ago