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The Voith-Schneider Propeller is a vertical-axis marine drive whose spinning blades change pitch continuously, letting a ship generate instant thrust in any direction, like a helicopter rotor underwater. Super-maneuverable, perfect for tugs and ferries.

Bart 🌊⚓️

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860,761 次观看 • 8 个月前 •via X (Twitter)

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The Ka-27 uses a complex coaxial rotor system to eliminate the need for a tail rotor. It has two three-bladed rotors mounted on the same axis. They rotate in opposite directions, so their torque reactions largely cancel. But both rotors still need collective and cyclic pitch control. That requires concentric drive shafts, swashplates, pitch links and other control mechanisms to fit into one compact rotor head. The animation shows how much hardware is needed to control two rotors from the same axis. The result is a compact helicopter without a tail rotor, but with a much more complex rotor head and transmission.

The Ka-27 uses a complex coaxial rotor system to eliminate the need for a tail rotor. It has two three-bladed rotors mounted on the same axis. They rotate in opposite directions, so their torque reactions largely cancel. But both rotors still need collective and cyclic pitch control. That requires concentric drive shafts, swashplates, pitch links and other control mechanisms to fit into one compact rotor head. The animation shows how much hardware is needed to control two rotors from the same axis. The result is a compact helicopter without a tail rotor, but with a much more complex rotor head and transmission.

Tengiz

144,386 次观看 • 18 天前

Absolutely wild footage, this is a real world engine failure in a MD500 (Think Magnum P.I. helicopter) over Kauai, Hawaii out on a tour flight. You’ll probably have to watch this a few times but the video starts out with the helicopter under power and then the engine sound goes silent. The beeping you hear is the engine-out audio beep to inform the pilot that engine power has been lost. This maneuver that pilot is doing is called a Autorotation and the way to think about helicopter flight, the engine is turning this big fan (rotor blades) on top of the body and sucking in air from the top and projecting it downward to overcome the force of gravity. When engine power is lost, you experience a reverse in airflow because now gravity takes over and the air flow is coming from the bottom of the main rotor disk. The only thing the pilot can really do is to make sure the rotors keep spinning by changing the pitch of the rotor blades through the use of the “collective” which is a lever next to the pilot’s left leg and it only moves up and down. The pilot has to manipulate the collective during an auto rotation to make sure the blades keep spinning. If the pilot pulls up too much on the collective, the rotor blades will bite too much of air causing a resistance and slow the rotors down. If the pilot doesn’t pull enough collective.. the blades will speed up and potentially cause a catastrophic failure. The other control the pilot has is called the cyclic. This cyclic sits between the pilots legs and and manipulates individual pitch of the rotor blades to tilt the rotor disk aka “big fan” and make the helicopter go forward, backwards, left, right. So essentially in this type of emergency, you have to manipulate the controls in a delicate balance because no matter what, gravity is taking you to the ground because the engine is no longer producing power. The pilot did an outstanding job here given the geography and limited amount of flat terrain to put the helicopter on the ground. Thankfully it sounds like no souls were lost and only one injury according to a news report (see the link below)👇 Of course there is a lot more to helicopter aerodynamics but I’m trying my best to put this in simpler to digest terms. Big thanks to Combat Learjet for sharing and definitely worth a follow!

Absolutely wild footage, this is a real world engine failure in a MD500 (Think Magnum P.I. helicopter) over Kauai, Hawaii out on a tour flight. You’ll probably have to watch this a few times but the video starts out with the helicopter under power and then the engine sound goes silent. The beeping you hear is the engine-out audio beep to inform the pilot that engine power has been lost. This maneuver that pilot is doing is called a Autorotation and the way to think about helicopter flight, the engine is turning this big fan (rotor blades) on top of the body and sucking in air from the top and projecting it downward to overcome the force of gravity. When engine power is lost, you experience a reverse in airflow because now gravity takes over and the air flow is coming from the bottom of the main rotor disk. The only thing the pilot can really do is to make sure the rotors keep spinning by changing the pitch of the rotor blades through the use of the “collective” which is a lever next to the pilot’s left leg and it only moves up and down. The pilot has to manipulate the collective during an auto rotation to make sure the blades keep spinning. If the pilot pulls up too much on the collective, the rotor blades will bite too much of air causing a resistance and slow the rotors down. If the pilot doesn’t pull enough collective.. the blades will speed up and potentially cause a catastrophic failure. The other control the pilot has is called the cyclic. This cyclic sits between the pilots legs and and manipulates individual pitch of the rotor blades to tilt the rotor disk aka “big fan” and make the helicopter go forward, backwards, left, right. So essentially in this type of emergency, you have to manipulate the controls in a delicate balance because no matter what, gravity is taking you to the ground because the engine is no longer producing power. The pilot did an outstanding job here given the geography and limited amount of flat terrain to put the helicopter on the ground. Thankfully it sounds like no souls were lost and only one injury according to a news report (see the link below)👇 Of course there is a lot more to helicopter aerodynamics but I’m trying my best to put this in simpler to digest terms. Big thanks to Combat Learjet for sharing and definitely worth a follow!

Thenewarea51

5,857,490 次观看 • 2 年前

This technology has me curious. It's called Wind Sail Propulsion. It's still in the 1.0 stages IMO. It's kind of interesting though and could potential save on fuel costs to get things across the ocean. It harnesses wind energy to assist or, in some cases, serve as the primary means of propelling ships. Another technology is the Flettner rotor, which uses the Magnus effect—created by spinning vertical cylinders in a wind stream—to generate forward thrust. Unlike sails, the rotor is powered by its own motor, allowing it to generate propulsion even when wind direction is unfavorable. Do you see potential for this kind of technology? What kinds of potential problems could arise? 🤨

This technology has me curious. It's called Wind Sail Propulsion. It's still in the 1.0 stages IMO. It's kind of interesting though and could potential save on fuel costs to get things across the ocean. It harnesses wind energy to assist or, in some cases, serve as the primary means of propelling ships. Another technology is the Flettner rotor, which uses the Magnus effect—created by spinning vertical cylinders in a wind stream—to generate forward thrust. Unlike sails, the rotor is powered by its own motor, allowing it to generate propulsion even when wind direction is unfavorable. Do you see potential for this kind of technology? What kinds of potential problems could arise? 🤨

AllieJade

1,741,888 次观看 • 9 个月前

Austria-based startup CycloTech is developing flying aircraft powered by CycloRotor technology instead of traditional propellers. The company plans to build a four-seater air taxi with four CycloRotors, offering an 85 km range, 40 minutes of flight time, and a cruising speed of 150 km/h. Each CycloRotor uses rotating wings that continuously change their angle to generate thrust, allowing the aircraft to move precisely in any direction.

Austria-based startup CycloTech is developing flying aircraft powered by CycloRotor technology instead of traditional propellers. The company plans to build a four-seater air taxi with four CycloRotors, offering an 85 km range, 40 minutes of flight time, and a cruising speed of 150 km/h. Each CycloRotor uses rotating wings that continuously change their angle to generate thrust, allowing the aircraft to move precisely in any direction.

Space and Technology

46,524 次观看 • 1 个月前

Gravity-defying robot! 🦎 VertiGo is a wall-climbing robot created by Disney Research and ETH Zürich that can transition between ground and wall. The robot can move on a wall quickly and with agility. VertiGo has four wheels, two tiltable propellers, and two tiltable propellers. One pair of wheels is steerable, and each propeller has two degrees of freedom for adjusting the direction of thrust. The choice of two propellers rather than one enables a floor-to-wall transition, thrust is applied both towards the wall using the rear propeller and in an upward direction using the front propeller, resulting in a flip onto the wall. P.S. Can you guess the year of development? 👀 ~~~ ♻️ Join the weekly robotics newsletter, and never miss any news →

Gravity-defying robot! 🦎 VertiGo is a wall-climbing robot created by Disney Research and ETH Zürich that can transition between ground and wall. The robot can move on a wall quickly and with agility. VertiGo has four wheels, two tiltable propellers, and two tiltable propellers. One pair of wheels is steerable, and each propeller has two degrees of freedom for adjusting the direction of thrust. The choice of two propellers rather than one enables a floor-to-wall transition, thrust is applied both towards the wall using the rear propeller and in an upward direction using the front propeller, resulting in a flip onto the wall. P.S. Can you guess the year of development? 👀 ~~~ ♻️ Join the weekly robotics newsletter, and never miss any news →

Lukas Ziegler

189,849 次观看 • 5 个月前

This is what I’ve been saying for weeks on the podcast. It feels like there is no direction for Marvel. It feels like they are just spinning in different directions and no one is driving the bus. They need a clear direction for the universe.

This is what I’ve been saying for weeks on the podcast. It feels like there is no direction for Marvel. It feels like they are just spinning in different directions and no one is driving the bus. They need a clear direction for the universe.

James Portis III | JPenumbra

19,000 次观看 • 3 个月前

When a helicopter hovers near the ground, its rotor blades push down massive amounts of air. This powerful downwash creates a violent wind vortex on the deck. If the ground crew leaves even one piece of plastic or canvas unsecured, it transforms the landing zone into a trap . The vacuum effect sucks the lightweight tarp straight up into the rotor disc and the danger is catastrophic. A rogue object wrapping around the rotor head can instantly disrupt airflow, destroying all lift. Worse, the sudden mechanical resistance can tear the transmission apart, stall the engine, or shred the tail rotor, sending the aircraft into an uncontrollable spin. In this clip, you can actually see the sheer strength of modern engineering. Instead of snapping like twigs, the blades act like giant machetes. Modern rotors are built from advanced composite layers wrapped in titanium leading edges. They are designed to withstand massive kinetic forces, allowing them to literally shred the fabric mid-air. Even though the helicopter managed to fly away, it’s not out of the woods. The extreme stress of a rotor strike can cause invisible, microscopic cracks inside the blades. This aircraft is headed straight to the hangar for a complete teardown inspection before it ever leaves the ground again.

When a helicopter hovers near the ground, its rotor blades push down massive amounts of air. This powerful downwash creates a violent wind vortex on the deck. If the ground crew leaves even one piece of plastic or canvas unsecured, it transforms the landing zone into a trap . The vacuum effect sucks the lightweight tarp straight up into the rotor disc and the danger is catastrophic. A rogue object wrapping around the rotor head can instantly disrupt airflow, destroying all lift. Worse, the sudden mechanical resistance can tear the transmission apart, stall the engine, or shred the tail rotor, sending the aircraft into an uncontrollable spin. In this clip, you can actually see the sheer strength of modern engineering. Instead of snapping like twigs, the blades act like giant machetes. Modern rotors are built from advanced composite layers wrapped in titanium leading edges. They are designed to withstand massive kinetic forces, allowing them to literally shred the fabric mid-air. Even though the helicopter managed to fly away, it’s not out of the woods. The extreme stress of a rotor strike can cause invisible, microscopic cracks inside the blades. This aircraft is headed straight to the hangar for a complete teardown inspection before it ever leaves the ground again.

Turbex Aero

57,350 次观看 • 2 天前

Automatic Helicopter Landings on Naval Ships Landing a helicopter on a moving naval ship is one of the most demanding tasks in aviation. The flight deck continuously changes its position, attitude, and velocity with the sea, requiring precise relative positioning throughout the approach. The landing sequence uses two navigation systems. During the approach, Differential GPS (DGPS) guides the helicopter along a calculated flight path. Near the flight deck, navigation switches to a laser guidance system, providing centimeter-level relative positioning for the final hover and touchdown. During the automatic hover, the flight control system continuously compensates for ship motion, wind, and turbulence to maintain a stable landing position. This significantly reduces pilot workload and can safely complete the landing even if the pilot becomes incapacitated. The system entered operational service on the JMSDF SH-60K Seahawk, becoming the world's first operational system capable of fully automatic landings of a manned helicopter on a moving naval ship. It was developed by Mitsubishi Heavy Industries.

Automatic Helicopter Landings on Naval Ships Landing a helicopter on a moving naval ship is one of the most demanding tasks in aviation. The flight deck continuously changes its position, attitude, and velocity with the sea, requiring precise relative positioning throughout the approach. The landing sequence uses two navigation systems. During the approach, Differential GPS (DGPS) guides the helicopter along a calculated flight path. Near the flight deck, navigation switches to a laser guidance system, providing centimeter-level relative positioning for the final hover and touchdown. During the automatic hover, the flight control system continuously compensates for ship motion, wind, and turbulence to maintain a stable landing position. This significantly reduces pilot workload and can safely complete the landing even if the pilot becomes incapacitated. The system entered operational service on the JMSDF SH-60K Seahawk, becoming the world's first operational system capable of fully automatic landings of a manned helicopter on a moving naval ship. It was developed by Mitsubishi Heavy Industries.

Tengiz

41,135 次观看 • 23 天前

Washington State Ferries (WSF) is once again struggling to keep its vessels afloat ahead of the crucial Seahawks-Rams game. Two large boats serving Seattle routes are currently out of service, leaving only 15 ferries when 17 are needed for full winter service, WSF said. The Seahawks' NFC Championship game, which will determine a spot in the Super Bowl, is happening at Seattle's Lumen Field on Sunday. One of the two large ferries that's out of service is the Wenatchee, which hit a log and bent a propeller during foggy weather on Wednesday. The vessel, which is used on the Seattle-Bainbridge Island route, can carry 202 vehicles. It's one of the largest ferries in the WSF fleet. Full story here: #komo #komo4 #komonews #komo4news #seattle #washington #ferries #ferry #wsf #seahawks #lumenfield #bainbridge

Washington State Ferries (WSF) is once again struggling to keep its vessels afloat ahead of the crucial Seahawks-Rams game. Two large boats serving Seattle routes are currently out of service, leaving only 15 ferries when 17 are needed for full winter service, WSF said. The Seahawks' NFC Championship game, which will determine a spot in the Super Bowl, is happening at Seattle's Lumen Field on Sunday. One of the two large ferries that's out of service is the Wenatchee, which hit a log and bent a propeller during foggy weather on Wednesday. The vessel, which is used on the Seattle-Bainbridge Island route, can carry 202 vehicles. It's one of the largest ferries in the WSF fleet. Full story here: #komo #komo4 #komonews #komo4news #seattle #washington #ferries #ferry #wsf #seahawks #lumenfield #bainbridge

KOMO News

10,988 次观看 • 7 个月前

🚨THE KING OF HEAVY LIFT JUST ENTERED THE SKY Watch this machine carefully. In slow mo… That is a U.S. Marine Corps CH-53E Super Stallion tearing through the sky like a steel thunderstorm. Three General Electric T64 engines screaming. Seven massive rotor blades carving the air. Nearly 80,000 pounds of flying American engineering. This isn’t a helicopter… It’s a flying freight train. The CH-53E can lift 36,000 pounds of cargo and haul Marines, artillery, vehicles, or battlefield supplies wherever they are needed. Bridges. Mountains. Cities. Ocean assault zones. It doesn’t matter. When the Super Stallion arrives, it brings the logistics power that wins wars. Watch the rotor wash kick up dust as it drops low over the town. That’s the sound of raw mechanical authority. This aircraft has been the backbone of Marine heavy lift for decades… Delivering troops into combat zones… moving artillery… hauling vehicles… and resupplying forces where no truck or ship can reach. People talk about fighters like the F-22 and F-35… But wars are won because machines like this move the weight of war itself. The CH-53E isn’t flashy. It’s relentless. And when the Marines need something moved… This monster answers the call. #SilentMajoritySpeaks #AStoneGroove

🚨THE KING OF HEAVY LIFT JUST ENTERED THE SKY Watch this machine carefully. In slow mo… That is a U.S. Marine Corps CH-53E Super Stallion tearing through the sky like a steel thunderstorm. Three General Electric T64 engines screaming. Seven massive rotor blades carving the air. Nearly 80,000 pounds of flying American engineering. This isn’t a helicopter… It’s a flying freight train. The CH-53E can lift 36,000 pounds of cargo and haul Marines, artillery, vehicles, or battlefield supplies wherever they are needed. Bridges. Mountains. Cities. Ocean assault zones. It doesn’t matter. When the Super Stallion arrives, it brings the logistics power that wins wars. Watch the rotor wash kick up dust as it drops low over the town. That’s the sound of raw mechanical authority. This aircraft has been the backbone of Marine heavy lift for decades… Delivering troops into combat zones… moving artillery… hauling vehicles… and resupplying forces where no truck or ship can reach. People talk about fighters like the F-22 and F-35… But wars are won because machines like this move the weight of war itself. The CH-53E isn’t flashy. It’s relentless. And when the Marines need something moved… This monster answers the call. #SilentMajoritySpeaks #AStoneGroove

A Gene Robinson

90,947 次观看 • 5 个月前

'There is a significant concern of demographic change, cultural change, religious change, you name it.' Michelle Dewberry says many Britons don't like the direction of travel the UK is going in and that it is 'opposite to what they have democratically voted for time and again'.

'There is a significant concern of demographic change, cultural change, religious change, you name it.' Michelle Dewberry says many Britons don't like the direction of travel the UK is going in and that it is 'opposite to what they have democratically voted for time and again'.

GB News

39,718 次观看 • 2 个月前

🇩🇪 Nuclear submarine commanders train their entire careers to remain invisible. This helicopter exists to find them. The NH90 Sea Tiger is Germany's new naval helicopter and it hunts submarines using 3 simultaneous methods: 1. 360-degree radar and infrared cameras scanning the surface for periscope exposure 2. ⁠Active dipping sonar lowered on a cable that bounces acoustic pulses off metal hulls underwater 3. ⁠Sonobuoys, a deployable grid of floating microphones that listen for reactor hum and propeller vibrations Onboard computers use this data to calculate the submarine's exact depth, speed, and heading, then the helicopter launches a lightweight torpedo that continues the hunt autonomously. Submarines have historically been a weapons system that required either another submarine or a dedicated warship to neutralize. The Sea Tiger changes that calculus by putting submarine-killing capability into a helicopter that can be deployed from almost any naval vessel. Nowhere to hide in modern warfare, the tech has gotten too good. Source: Defence Dec YT0

🇩🇪 Nuclear submarine commanders train their entire careers to remain invisible. This helicopter exists to find them. The NH90 Sea Tiger is Germany's new naval helicopter and it hunts submarines using 3 simultaneous methods: 1. 360-degree radar and infrared cameras scanning the surface for periscope exposure 2. ⁠Active dipping sonar lowered on a cable that bounces acoustic pulses off metal hulls underwater 3. ⁠Sonobuoys, a deployable grid of floating microphones that listen for reactor hum and propeller vibrations Onboard computers use this data to calculate the submarine's exact depth, speed, and heading, then the helicopter launches a lightweight torpedo that continues the hunt autonomously. Submarines have historically been a weapons system that required either another submarine or a dedicated warship to neutralize. The Sea Tiger changes that calculus by putting submarine-killing capability into a helicopter that can be deployed from almost any naval vessel. Nowhere to hide in modern warfare, the tech has gotten too good. Source: Defence Dec YT0

Mario Nawfal

16,882 次观看 • 4 个月前

.DrOzCMS: “This roundtable on Lyme would never have happened if it wasn’t for Secretary Kennedy…You get him going on things like Lyme and it gets him agitated for a very good reason. The massive ship that is HHS, even with a great captain, cannot change direction unless he’s barking about it all the time.”

.DrOzCMS: “This roundtable on Lyme would never have happened if it wasn’t for Secretary Kennedy…You get him going on things like Lyme and it gets him agitated for a very good reason. The massive ship that is HHS, even with a great captain, cannot change direction unless he’s barking about it all the time.”

HHS Rapid Response

13,931 次观看 • 8 个月前

Eric Hartman with a 3 for 5 day with a double and 2 singles (got thrown out trying to stretch for a second double) After hitting .299 in April and .296 in May, he is SCORTCHING to a .414 in June with 12 hits in 29 at bats and the exit velos continue to stay impressive. I have been super impressed with his feel for the zone and limited chase until he gets a pitch he can drive.

Eric Hartman with a 3 for 5 day with a double and 2 singles (got thrown out trying to stretch for a second double) After hitting .299 in April and .296 in May, he is SCORTCHING to a .414 in June with 12 hits in 29 at bats and the exit velos continue to stay impressive. I have been super impressed with his feel for the zone and limited chase until he gets a pitch he can drive.

Lethal platy

18,055 次观看 • 2 个月前

Letting go of a name isn’t easy, but change fuels growth. With Drickle, we’re brewing a new age of everyday beverages. Coffee at the core, with fun twists like matcha, boba & more. Drickle is for you, for every mood, every you! Bonomi is Drickle now, super excited to build for you and with you! Drickle

Letting go of a name isn’t easy, but change fuels growth. With Drickle, we’re brewing a new age of everyday beverages. Coffee at the core, with fun twists like matcha, boba & more. Drickle is for you, for every mood, every you! Bonomi is Drickle now, super excited to build for you and with you! Drickle

Vardhman Jain

16,710 次观看 • 11 个月前

A U.S. Border Patrol K9 named Boo was bitten by a rattlesnake while patrolling the rugged Otay Mountain Wilderness. Boo’s handler quickly called for help, and within minutes, agents with CBP Air and Marine Operations airlifted the injured dog by helicopter to a veterinary emergency hospital in La Mesa. The helicopter touched down near the intersection of Grossmont Boulevard and Jackson Drive, surprising residents and drivers who weren’t sure what was happening. Fortunately, Boo received antivenom and IV fluids in time and is now under observation. Officials say he is stable and recovering. Yay Boo!!!!! 🥰🥰

A U.S. Border Patrol K9 named Boo was bitten by a rattlesnake while patrolling the rugged Otay Mountain Wilderness. Boo’s handler quickly called for help, and within minutes, agents with CBP Air and Marine Operations airlifted the injured dog by helicopter to a veterinary emergency hospital in La Mesa. The helicopter touched down near the intersection of Grossmont Boulevard and Jackson Drive, surprising residents and drivers who weren’t sure what was happening. Fortunately, Boo received antivenom and IV fluids in time and is now under observation. Officials say he is stable and recovering. Yay Boo!!!!! 🥰🥰

Sadie

166,328 次观看 • 4 个月前