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Will Flying cars could cut emissions, replace planes, and reduce traffic - but not soon enough | mmvnews in Hindi


Flying cars could cut emissions, replace planes, and reduce traffic - but not soon enough|mmvnews in Hindi flying car for sale flying car for sale

Flying cars could cut emissions, replace planes, and reduce traffic - but not soon enough|mmvnews in Hindi

When Chitty Chitty Bang Bang was released 50 years ago, flying cars were a flight of fancy. Now, these futuristic vehicles are the realities of the outer fringes of reality. According to a new study published in Nature, for some travels flying cars may eventually be greener than even electric road cars, cutting emissions while also increasingly busy roads on traffic.

• How much does a real flying car cost

However, gaps in essential technology and practical uncertainties beyond the cars' promising physics mean that they may not be able to time in a big-scale solution to the energy crisis and crowd - if at all.

• How to make a car fly

It might be the first time that a car could be more efficient than a road car, especially when conventional planes have such a reputation as gas guzzlers. But flying is not inherently inefficient - After all, birds can fly between continents without eating Of course, a small, four-passenger car is not an albatross, but it is not a Boeing 737 either.

• Flying cars could cut emission

There are many ways to make a car fly, but most are too problematic to get off the ground. Perhaps the most promising option that has taken into this study, based on the physics of vertical take-off and landing (VTOL) aircraft. They're pretty amazing beasts

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If you have heard of VTOL, something like a Harrier Jump Jet probably springs to mind, with two huge engines directing thrust that can be tilted vertically or horizontally. But these very small and light flying cars operate differently, with lots of tiny electric fans blowing air from many places. This fast-developing distributed electric propulsion (DEP) technology is key for efficiency when cruising, and it also creates possibilities for quieter take-off and hovering, as well as many small noise sources can be better managed.

• Will there be flying cars in the future

Wing and propeller design can also be optimized to be long, thin, and have lots of moving surfaces, just as birds do make their flying efficient. The aim of all of these technical enhancements is to achieve maximum lift for minimal drag - the force that opposes an object's motion through air and slows it down. A better lift-to-drag ratio means lower power consumption, and hence lower emissions.


These energy-saving innovations make cruising a breeze - but they do not help much with take-off, hovering, or landing, which are still inherently inefficient. So while VTOL flying vehicles are still viable for short intra-city travel and pizza deliveries, they will not solve the energy crisis.

• Will fly cars ever happen

For 100km journeys, electric flying vehicles could be 35% more efficient than a petrol-powered car - although, the number of passengers of the same number, still less efficient than an electric road car. However, it's fair to assume that the flying cars will serve as the predefined air corridors in primarily as taxi services, and they are therefore usually carrying more people. Taking this in account, for a 100km tour of freight cars

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As travel distance increases, so too do the efficiency gains over stop-start road cars, which has to deal with rolling resistance and less efficient airflow. But unfortunately, the range is the Achilles heel for electric aviation. The study looks at a range of up to 200km and here flying cars could perform well. But while jet-fuelled planes lose as much as 70% of their weight during flight (albeit at a cost of 100kg of CO₂ per passenger per hour), batteries do not get lighter as they discharge. This means that beyond 200km or so, having batteries becomes a distinct disadvantage.

Which was the world's first real flying car

The accepted view is that the electric planes will only be viable for short-haul flights. It's energy density that matters, measured in watt-hours per kilogram. Right now, the best batteries provide around 250 W-h / kg, a mere shadow of jet fuel and gasoline's 12,000 W-h / kg. Batteries could creep up to 800 W-h / kg by the middle of the century, increasing their feasible range to 700 miles - half of all global flights fall within the distance But without more dramatic innovation in battery technology, biofuels and liquid fuel from air-capture of CO₂ may require a long-haul air travel in a substantial role.


• Problems in practice

In focusing on completely the physics of flying cars, the paper steers clear of a number of practicalities that must be considered before. For example, it is important to consider the carbon costs of production, maintenance and down time, known as Life-Cycle Analysis (LCA). Electric vehicles have been criticized for both the energy and environmental costs of mining primary materials for batteries, such as lithium and cobalt. Added infrastructure needed for flight cars And of course, a grid powered by low-carbon sources is necessary to make battery-powered vehicles.

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Aircraft also has high stringent maintenance and downtime, which can often offset gains in performance and emissions. As a whole new breed of planes, it is impossible to predict how to spend them air-worthy. Unforeseen maintenance complications can cost billions - just ask Boeing

Are flying cars safe

Finally, weather matters. A tailwind of 35mph reduces power use and emissions by 15%, but a 35mph headwind increases them by 25%. Having to carry heavy extra batteries to avoid the potential catastrophe of running out of charge. Road cars, by contrast, can easily remove the road when needed, without result

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So when it comes down to CO 2 emissions per passenger kilometer, at present these advanced DEP are the best comparable to their road-going electrical equivalents, and, at worst, slightly better than conventional combustion cars. With technology and safety improvements, they could still play a part in our fossil-fuel-free future, taking less-hull planes out of our skies and freeing up fume-filled roads. The question on everyones' lips is whether this flying cars will be ready in time to make a jot of difference to our very pressing energy crisis. Can we wait 30 years?

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