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#propeller — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #propeller, aggregated by home.social.

  1. 1/? What a gorgeous mild summer day. Hung out at the pier at 44th street, lucky to see big boat action.
    #NYC #pier #dog #run #Intrepid #battleship #floating #museum #cruise #ship #propeller

  2. Successful high power test of the glider's electric motor with the spinner and propeller installed.

    I had it at full power: 4600 RPM and 150 amps at 115 volts DC. I conducted this test three times. No problems with vibrations, excessive temperature of the motor or any other components, or rapid draining of the batteries.

    This is a major milestone for the electric motor system.

    #AvGeek #Aviation #ElectricAircraft #Homebuilt #Glider #DIY #EAA #Motor #Engine #Propeller #Battery #Test #Milestone #Success #Goals

  3. Quietening Drones

    A drone’s noisiness is one of its major downfalls. Standard drones are obnoxiously loud and disruptive for both humans and animals, one reason that they’re not allowed in many places. This flow visualization, courtesy of the Slow Mo Guys, helps show why. The image above shows a standard off-the-shelf drone rotor. As each blade passes through the smoke, it sheds a wingtip vortex. (Note that these vortices are constantly coming off the blade, but we only see them where they intersect with the smoke.) As the blades go by, a constant stream of regularly-spaced vortices marches downstream of the rotor. This regular spacing creates the dominant acoustic frequency that we hear from the drone.

    Animation of wingtip vortices coming off a drone rotor with blades of different lengths. This causes interactions between the vortices, which helps disrupt the drone’s noise.

    To counter that, the company Wing uses a rotor with blades of different lengths (bottom image). This staggers the location of the shed vortices and causes some later vortices to spin up with their downstream neighbor. These interactions break up that regular spacing that generates the drone’s dominant acoustic frequency. Overall, that makes the drone sound quieter, likely without a large impact to the amount of lift it creates. (Image credit: The Slow Mo Guys)

    #acoustics #flowVisualization #fluidDynamics #physics #propeller #propellerVortex #science #wingtipVortices

  4. Woooh!
    100 year old trade barriers finally coming down.
    Not just pulling US alcohol off the shelf, replacing it with Canadian!

    I'm shipping my family in #BC some #Quebec sour beer while its still exotic.
    Personally I'm looking forward to grabbing some #Driftwood from #BC and #Propeller from #NovaScotia.

    youtu.be/NZTK36O1Dvo

  5. #GutenMorgen
    Um die Umweltbilanz dieser Haftnotiz wenigstens ein bisschen zu verbessern wird das Smartphone, mit dem das Foto aufgenommen wurde, mit Ökostrom geladen.

    #illustration #comic #Sparwitz #Flugzeug #Propeller #Wochenende #ink #Kaffee

  6. #MAGA #propeller

    It looks like #donaldtrump has grown an extra pair of arms to speed up the making of #america great although the use of 'again' is very disputable! I cannot think of a period when America was great except for in the time before #columbus arrived to the new world to bring annihilation, disease and... a religion with a man nailed on a cross!

    #posterdesign #printdesign #collageart

  7. Possible Bird Strike? USN E-2C flies into a flock of seagulls while working the pattern at Pt. Mugu. Note the blowup it appears part of the wing starting to wrap around the prop #USN #mugu #ptmugu #e2c #avgeek #propeller #AWACS #aviation #nikon #photography #birdstrike #aviation #seagulls #flockofseagulls

  8. Possible Bird Strike? USN E-2C flies into a flock of seagulls while working the pattern at Pt. Mugu. Note the blowup it appears part of the wing starting to wrap around the prop #USN #mugu #ptmugu #e2c #avgeek #propeller #AWACS #aviation #nikon #photography #birdstrike #aviation #seagulls #flockofseagulls

  9. Possible Bird Strike? USN E-2C flies into a flock of seagulls while working the pattern at Pt. Mugu. Note the blowup it appears part of the wing starting to wrap around the prop #USN #mugu #ptmugu #e2c #avgeek #propeller #AWACS #aviation #nikon #photography #birdstrike #aviation #seagulls #flockofseagulls

  10. Possible Bird Strike? USN E-2C flies into a flock of seagulls while working the pattern at Pt. Mugu. Note the blowup it appears part of the wing starting to wrap around the prop #USN #mugu #ptmugu #e2c #avgeek #propeller #AWACS #aviation #nikon #photography #birdstrike #aviation #seagulls #flockofseagulls

  11. Possible Bird Strike? USN E-2C flies into a flock of seagulls while working the pattern at Pt. Mugu. Note the blowup it appears part of the wing starting to wrap around the prop #USN #mugu #ptmugu #e2c #avgeek #propeller #AWACS #aviation #nikon #photography #birdstrike #aviation #seagulls #flockofseagulls

  12. Efficiency gains from engines will still be vital for the industry.

    The most marked change in the appearance of #engines could be the return of the open #propeller.

    The design dispenses with the #nacelle
    – the cover
    – to allow for a bigger fan that offers more propulsive force.

    Superficially, it will look like existing turboprop engines,
    but with the ability to fly at Mach 0.8, or 80% of the speed of sound
    – the same as current jet engines.

    #CFM, a joint-venture between America’s General Electric and France’s Safran, has said that its open fan #Rise engine could theoretically reduce fuel consumption and carbon emissions by 20%.

    The company says it can reduce noise, which put paid to a previous prototype in 1986.

    It will still have to persuade regulators and passengers that the engines will be safe if a blade breaks in midair.

    As well as radical changes to airframes or engines, manufacturers are constantly looking for ways to salami-slice #fuel burn via small gains.

    #Winglets, the curved tips of wings, were first introduced in the 1970s in response to the then oil crisis,
    mimicking birds’ wings to reduce drag.

    The split winglets on the 737 family since 2014 can reduce fuel burn by as much as 2% during a long journey, according to the Seattle-based manufacturer Aviation Partners.

    (For plane-spotters, they double as the easiest way to distinguish a 737 from an A320.)

    Birds have had millennia to evolve the ideal features for efficient flight,
    so aviation designers have constantly used them for inspiration.

    Airbus is experimenting with #gust #sensors on the front of the aircraft to register during turbulence,
    with automatic responses from control surfaces of the wing,
    similar to a bird’s constant adjustments to movements in the air.

    #Concorde, which flew on only a limited number of routes, was the last passenger plane in service with a truly distinctive design.

    The supersonic jet, which had swept-back, delta wings, was retired in 2003.

    #Boom #Supersonic, a startup, is testing the technologies for a proposed “son of Concorde” with a similar look.

    That plane would only ever be a niche service, flying 80 passengers at a time on premium routes.

    But there is a possibility that Boeing and Airbus take radically different approaches to the workhorses that carry billions of passengers each year.

    If the manufacturers go in different directions, then passengers might start paying serious attention to plane design, says Addison Schonland, an analyst who tracks the industry at AirInsight.

    “I don’t think we’ve ever had a situation before, to look at an aeroplane and say, ‘that’s completely different’,” he says.

    “How will people react to seeing those novel shapes?”

    (3/3)
    #Airbus #JetZero #Delft #University #McKinsey #fuel #efficiency #Boeing #truss #transonic

  13. Efficiency gains from engines will still be vital for the industry.

    The most marked change in the appearance of #engines could be the return of the open #propeller.

    The design dispenses with the #nacelle
    – the cover
    – to allow for a bigger fan that offers more propulsive force.

    Superficially, it will look like existing turboprop engines,
    but with the ability to fly at Mach 0.8, or 80% of the speed of sound
    – the same as current jet engines.

    #CFM, a joint-venture between America’s General Electric and France’s Safran, has said that its open fan #Rise engine could theoretically reduce fuel consumption and carbon emissions by 20%.

    The company says it can reduce noise, which put paid to a previous prototype in 1986.

    It will still have to persuade regulators and passengers that the engines will be safe if a blade breaks in midair.

    As well as radical changes to airframes or engines, manufacturers are constantly looking for ways to salami-slice #fuel burn via small gains.

    #Winglets, the curved tips of wings, were first introduced in the 1970s in response to the then oil crisis,
    mimicking birds’ wings to reduce drag.

    The split winglets on the 737 family since 2014 can reduce fuel burn by as much as 2% during a long journey, according to the Seattle-based manufacturer Aviation Partners.

    (For plane-spotters, they double as the easiest way to distinguish a 737 from an A320.)

    Birds have had millennia to evolve the ideal features for efficient flight,
    so aviation designers have constantly used them for inspiration.

    Airbus is experimenting with #gust #sensors on the front of the aircraft to register during turbulence,
    with automatic responses from control surfaces of the wing,
    similar to a bird’s constant adjustments to movements in the air.

    #Concorde, which flew on only a limited number of routes, was the last passenger plane in service with a truly distinctive design.

    The supersonic jet, which had swept-back, delta wings, was retired in 2003.

    #Boom #Supersonic, a startup, is testing the technologies for a proposed “son of Concorde” with a similar look.

    That plane would only ever be a niche service, flying 80 passengers at a time on premium routes.

    But there is a possibility that Boeing and Airbus take radically different approaches to the workhorses that carry billions of passengers each year.

    If the manufacturers go in different directions, then passengers might start paying serious attention to plane design, says Addison Schonland, an analyst who tracks the industry at AirInsight.

    “I don’t think we’ve ever had a situation before, to look at an aeroplane and say, ‘that’s completely different’,” he says.

    “How will people react to seeing those novel shapes?”

    (3/3)
    #Airbus #JetZero #Delft #University #McKinsey #fuel #efficiency #Boeing #truss #transonic

  14. Efficiency gains from engines will still be vital for the industry.

    The most marked change in the appearance of #engines could be the return of the open #propeller.

    The design dispenses with the #nacelle
    – the cover
    – to allow for a bigger fan that offers more propulsive force.

    Superficially, it will look like existing turboprop engines,
    but with the ability to fly at Mach 0.8, or 80% of the speed of sound
    – the same as current jet engines.

    #CFM, a joint-venture between America’s General Electric and France’s Safran, has said that its open fan #Rise engine could theoretically reduce fuel consumption and carbon emissions by 20%.

    The company says it can reduce noise, which put paid to a previous prototype in 1986.

    It will still have to persuade regulators and passengers that the engines will be safe if a blade breaks in midair.

    As well as radical changes to airframes or engines, manufacturers are constantly looking for ways to salami-slice #fuel burn via small gains.

    #Winglets, the curved tips of wings, were first introduced in the 1970s in response to the then oil crisis,
    mimicking birds’ wings to reduce drag.

    The split winglets on the 737 family since 2014 can reduce fuel burn by as much as 2% during a long journey, according to the Seattle-based manufacturer Aviation Partners.

    (For plane-spotters, they double as the easiest way to distinguish a 737 from an A320.)

    Birds have had millennia to evolve the ideal features for efficient flight,
    so aviation designers have constantly used them for inspiration.

    Airbus is experimenting with #gust #sensors on the front of the aircraft to register during turbulence,
    with automatic responses from control surfaces of the wing,
    similar to a bird’s constant adjustments to movements in the air.

    #Concorde, which flew on only a limited number of routes, was the last passenger plane in service with a truly distinctive design.

    The supersonic jet, which had swept-back, delta wings, was retired in 2003.

    #Boom #Supersonic, a startup, is testing the technologies for a proposed “son of Concorde” with a similar look.

    That plane would only ever be a niche service, flying 80 passengers at a time on premium routes.

    But there is a possibility that Boeing and Airbus take radically different approaches to the workhorses that carry billions of passengers each year.

    If the manufacturers go in different directions, then passengers might start paying serious attention to plane design, says Addison Schonland, an analyst who tracks the industry at AirInsight.

    “I don’t think we’ve ever had a situation before, to look at an aeroplane and say, ‘that’s completely different’,” he says.

    “How will people react to seeing those novel shapes?”

    (3/3)
    #Airbus #JetZero #Delft #University #McKinsey #fuel #efficiency #Boeing #truss #transonic

  15. Efficiency gains from engines will still be vital for the industry.

    The most marked change in the appearance of #engines could be the return of the open #propeller.

    The design dispenses with the #nacelle
    – the cover
    – to allow for a bigger fan that offers more propulsive force.

    Superficially, it will look like existing turboprop engines,
    but with the ability to fly at Mach 0.8, or 80% of the speed of sound
    – the same as current jet engines.

    #CFM, a joint-venture between America’s General Electric and France’s Safran, has said that its open fan #Rise engine could theoretically reduce fuel consumption and carbon emissions by 20%.

    The company says it can reduce noise, which put paid to a previous prototype in 1986.

    It will still have to persuade regulators and passengers that the engines will be safe if a blade breaks in midair.

    As well as radical changes to airframes or engines, manufacturers are constantly looking for ways to salami-slice #fuel burn via small gains.

    #Winglets, the curved tips of wings, were first introduced in the 1970s in response to the then oil crisis,
    mimicking birds’ wings to reduce drag.

    The split winglets on the 737 family since 2014 can reduce fuel burn by as much as 2% during a long journey, according to the Seattle-based manufacturer Aviation Partners.

    (For plane-spotters, they double as the easiest way to distinguish a 737 from an A320.)

    Birds have had millennia to evolve the ideal features for efficient flight,
    so aviation designers have constantly used them for inspiration.

    Airbus is experimenting with #gust #sensors on the front of the aircraft to register during turbulence,
    with automatic responses from control surfaces of the wing,
    similar to a bird’s constant adjustments to movements in the air.

    #Concorde, which flew on only a limited number of routes, was the last passenger plane in service with a truly distinctive design.

    The supersonic jet, which had swept-back, delta wings, was retired in 2003.

    #Boom #Supersonic, a startup, is testing the technologies for a proposed “son of Concorde” with a similar look.

    That plane would only ever be a niche service, flying 80 passengers at a time on premium routes.

    But there is a possibility that Boeing and Airbus take radically different approaches to the workhorses that carry billions of passengers each year.

    If the manufacturers go in different directions, then passengers might start paying serious attention to plane design, says Addison Schonland, an analyst who tracks the industry at AirInsight.

    “I don’t think we’ve ever had a situation before, to look at an aeroplane and say, ‘that’s completely different’,” he says.

    “How will people react to seeing those novel shapes?”

    (3/3)
    #Airbus #JetZero #Delft #University #McKinsey #fuel #efficiency #Boeing #truss #transonic

  16. Efficiency gains from engines will still be vital for the industry.

    The most marked change in the appearance of #engines could be the return of the open #propeller.

    The design dispenses with the #nacelle
    – the cover
    – to allow for a bigger fan that offers more propulsive force.

    Superficially, it will look like existing turboprop engines,
    but with the ability to fly at Mach 0.8, or 80% of the speed of sound
    – the same as current jet engines.

    #CFM, a joint-venture between America’s General Electric and France’s Safran, has said that its open fan #Rise engine could theoretically reduce fuel consumption and carbon emissions by 20%.

    The company says it can reduce noise, which put paid to a previous prototype in 1986.

    It will still have to persuade regulators and passengers that the engines will be safe if a blade breaks in midair.

    As well as radical changes to airframes or engines, manufacturers are constantly looking for ways to salami-slice #fuel burn via small gains.

    #Winglets, the curved tips of wings, were first introduced in the 1970s in response to the then oil crisis,
    mimicking birds’ wings to reduce drag.

    The split winglets on the 737 family since 2014 can reduce fuel burn by as much as 2% during a long journey, according to the Seattle-based manufacturer Aviation Partners.

    (For plane-spotters, they double as the easiest way to distinguish a 737 from an A320.)

    Birds have had millennia to evolve the ideal features for efficient flight,
    so aviation designers have constantly used them for inspiration.

    Airbus is experimenting with #gust #sensors on the front of the aircraft to register during turbulence,
    with automatic responses from control surfaces of the wing,
    similar to a bird’s constant adjustments to movements in the air.

    #Concorde, which flew on only a limited number of routes, was the last passenger plane in service with a truly distinctive design.

    The supersonic jet, which had swept-back, delta wings, was retired in 2003.

    #Boom #Supersonic, a startup, is testing the technologies for a proposed “son of Concorde” with a similar look.

    That plane would only ever be a niche service, flying 80 passengers at a time on premium routes.

    But there is a possibility that Boeing and Airbus take radically different approaches to the workhorses that carry billions of passengers each year.

    If the manufacturers go in different directions, then passengers might start paying serious attention to plane design, says Addison Schonland, an analyst who tracks the industry at AirInsight.

    “I don’t think we’ve ever had a situation before, to look at an aeroplane and say, ‘that’s completely different’,” he says.

    “How will people react to seeing those novel shapes?”

    (3/3)
    #Airbus #JetZero #Delft #University #McKinsey #fuel #efficiency #Boeing #truss #transonic

  17. Brass Propeller Gets Impressive Hand Trimming - Whether you’re a landlubber or an old salt, you’ve got to appreciate the effort th... - hackaday.com/2024/09/22/brass- #transportationhacks #metalworking #propeller #boat