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快3一定牛

2021-02-20 19:42

就像Marty McFly由香蕉提供動力的 “德羅寧” 時光機一樣优美,未來一代的飛行汽車可能顛覆所有飛行都對氣候有害的觀念他倒好。最新研究日前發表于《自然—通訊》雜志开打。

諸如勞斯萊斯飛行汽車500WJ、莉莉姆我聊天、垂直航空等公司曾辯稱要击溃,飛行汽車可能是一種綠色交通方式但人活,盡管它們起飛需要大量能源加内敛。

關于此類垂直起降飛行器(VTOLs)對環境影響的首批研究表明里回,它們的支持者可能是對的点亏,至少在某些情況下是如此上面居。

美國密歇根大學的Gregory Keoleian和同事發現蚂蚁窝,如果VTOLs升空令大,其產生的排放量比一輛電動汽車行駛100公里以上的排放量少6%要由他。

“VTOLs在起降過程中的能量消耗特別大岩修葺。然而很怪异,巡航階段的飛行非常高效年岁,並且在長距離飛行時他凭借,如果載滿人人探,完全可與地面車輛的效率競爭前一样。”Keoleian介紹說四片。

飛行汽車還有一個優勢︰能避開彎彎曲曲的路線三圈,在一條直線上飛行远古时。

不過他凸起,現在還不要貿然行動荣荣算。其中的差別非常泻棋省,而且面臨著好幾個打擊要裁。首先次害,會飛的汽車還不存在——目前它們僅處于原型階段才想通。

這些原型機依靠電力推進点熟悉,並且可像直升機一樣垂直降落抬脚走,從而充當空中出租車涛显。但另一個問題是拿下他,這項研究有點像隻果他没想、橘子之間的比較今佳人。

研究人員假定虚构,每輛電動汽車平均搭載1.54人力大手,而飛行汽車的乘客和司機分別為3人和1人呱噪烦。作出這種假定的理由是︰飛行汽車將提供像UberPool一樣的共享出租車服務点反常,但實際上電動汽車也可以做到這一點你进进。此外炼安排,由于起飛時需要能源前几次,飛行汽車35公里以下的行程產生的排放量將超過電動汽車回身边。

Keoleian及其團隊得出的結論是很假哦,飛行汽車在可持續交通領域可能會有一席之地很老。不過光正,即使被證明是綠色的托儿,它們也有很多需要跨越的障礙发布出。

勞斯萊斯飛行汽車

English version

Like Marty McFly's banana-powered “Dronin” time machine, future generations of flying cars may overturn the notion that all flights are harmful to the climate. The latest research was published in the journal Nature-Communication.

Companies such as Rolls Royce, Lilym, and Vertical Aviation have argued that flying cars may be a form of green transportation, although they require a lot of energy to take off.

The first studies on the environmental impact of such vertical takeoff and landing vehicles (VTOLs) suggest that their supporters may be right, at least in some cases.

Gregory Keoleian and colleagues at the University of Michigan found that if VTOLs were launched, they would emit 6% less emissions than an electric car driving more than 100 kilometers.

“VTOLs have a particularly high energy consumption during the takeoff and landing process. However, the flight during the cruise phase is very efficient, and when flying over long distances, if it is full, it can compete with the efficiency of the ground vehicle,” Keoleian said.

Flying cars also have an advantage: they can avoid the winding route and fly in a straight line.

However, do not act rashly now. The difference is very small and faces several blows. First of all, the flying cars don't exist yet - they are currently in the prototype stage.

These prototypes rely on electric propulsion and can land vertically like a helicopter to act as an air taxi. But another problem is that this study is a bit like a comparison between apples and oranges.

The researchers assume that each electric car carries an average of 1.54 passengers, while the passengers and drivers of the flying car are three and one. The reason for this assumption is that the flying car will provide a shared taxi service like UberPool, but in fact electric cars can do the same. In addition, due to the need for energy during take-off, the emissions from the flight below 35 km will exceed that of electric vehicles.

Keoleian and his team concluded that flying cars may have a place in the field of sustainable transportation. However, even if they prove to be green, they have many obstacles to overcome.

(文編譯︰飛行汽車 www.flycar.com.cn)

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