One advantage of airships is that for vertical lift(the force that keeps the ship airborne),they use a balloon that floats rather than an engine.Airplanes and helicopters use engines for both vertical lift and horizontal movement,but airships use engines solely for horizontal movement.So,airships use less fuel than a typical aircraft-thus making their fuel costs more economical.
An airship is a type of aircraft that flies using a very large balloon filled with a lighter-than-air gas. Airships were an important means of air transportation before the 1940s but are little used today, having been largely replaced by airplanes and helicopters.However,some aeronautical engineers believe that airships could become popular again because they offer a number of advantages over airplanes and helicopters.
Another advantage of airships is that they can be used in hard-to-reach locations.Unlike airplanes, airships do not require a long runway for takeoff and landing because of their ability to lift off and land vertically.The only other aircraft capable of ascending into the sky by going straight up and descending straight down to the ground is the helicopter,which can carry only a small amount of weight.Airships,meanwhile,are able to carry very heavy loads.As a result,airships could do jobs that neither airplanes nor helicopters can do,such as carrying heavy logs from forests to distribution centers.
Finally,airships could even be used to replace satellites.Currently, satellites are launched into Earth's orbit carying all kinds of equipment important in telecommunications or in surveying large areas of Earth's surface for military purposes.Since airships can also rise high above the surface and stay there without refueling for a significant amount of time,they could provide services similar to those provided by satellites,and at a considerably cheaper cost.
Both the reading and the lecture discuss about airship which is replaced by the airplane and helicopter. The author explains three advantages of airships; however, the lecturer believes that airships have several demerits which do not let to use them in the future anymore.
First of all, the passage claims that due to the fact that airships use less fuel, it is more economical to use them. Conversely, the speaker illustrates that the airships need special gases such as hydrogen or helium in order to lift. Hydrogen catches fire easily; so, it is dangerous to use it. For example, some accidents are reported in the past that show some airships destroyed due to using hydrogen. Moreover, helium, however it is safe, is a rare gas, and obtaining it is difficult. Therefore, it is too challenging to provide a balance between safety and cost.
Secondly, the text states that airships can transport heavy loads that is a positive point for them against airplanes and helicopters. On the other hand, the professor rejects the claim by saying that airships would be crashed at the time of the loading. To put logs on the airship, it must be steady. However, airships have light weights which does not let them be resistible to windy weather. A slight wind can break the airship balance during the loading of the freights. Therefore, using airships for carrying heavy loads is challenging.
Finally, the text explains that airships can be used as a satellite for carrying essential equipment for telecommunications. Nevertheless, the lecturer refutes it because she believes that the only type of airships which are used in this application, just can go up to 40KM which is not enough. Additionally, if they can go upper, they need to refueled continuously in order to save their balance against the wind. Not only are there no adequate tools that provide continuous fuel for them, but also it is not economical.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2021-05-30 | Greenbluemind | 75 | view |
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Grammar and spelling errors:
Line 2, column 524, Rule ID: ALLOW_TO[1]
Message: Did you mean 'providing'? Or maybe you should add a pronoun? In active voice, 'challenge' + 'to' takes an object, usually a pronoun.
Suggestion: providing
...icult. Therefore, it is too challenging to provide a balance between safety and cost. Se...
^^^^^^^^^^
Transition Words or Phrases used:
also, but, conversely, finally, first, however, if, moreover, nevertheless, second, secondly, so, therefore, for example, such as, first of all, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 18.0 10.4613686534 172% => OK
Auxiliary verbs: 9.0 5.04856512141 178% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 16.0 12.0772626932 132% => OK
Pronoun: 30.0 22.412803532 134% => Less pronouns wanted
Preposition: 34.0 30.3222958057 112% => OK
Nominalization: 5.0 5.01324503311 100% => OK
Performance on vocabulary words:
No of characters: 1593.0 1373.03311258 116% => OK
No of words: 321.0 270.72406181 119% => OK
Chars per words: 4.96261682243 5.08290768461 98% => OK
Fourth root words length: 4.23278547379 4.04702891845 105% => OK
Word Length SD: 2.77336612628 2.5805825403 107% => OK
Unique words: 178.0 145.348785872 122% => OK
Unique words percentage: 0.554517133956 0.540411800872 103% => OK
syllable_count: 489.6 419.366225166 117% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 5.0 3.25607064018 154% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 2.0 2.5761589404 78% => OK
Performance on sentences:
How many sentences: 18.0 13.0662251656 138% => OK
Sentence length: 17.0 21.2450331126 80% => The Avg. Sentence Length is relatively short.
Sentence length SD: 32.5320354932 49.2860985944 66% => OK
Chars per sentence: 88.5 110.228320801 80% => OK
Words per sentence: 17.8333333333 21.698381199 82% => OK
Discourse Markers: 9.0 7.06452816374 127% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 7.0 4.33554083885 161% => OK
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 8.0 4.27373068433 187% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.264671829122 0.272083759551 97% => OK
Sentence topic coherence: 0.0864475482648 0.0996497079465 87% => OK
Sentence topic coherence SD: 0.059396212337 0.0662205650399 90% => OK
Paragraph topic coherence: 0.164290765633 0.162205337803 101% => OK
Paragraph topic coherence SD: 0.0204720846474 0.0443174109184 46% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 10.8 13.3589403974 81% => Automated_readability_index is low.
flesch_reading_ease: 62.68 53.8541721854 116% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 8.7 11.0289183223 79% => OK
coleman_liau_index: 11.19 12.2367328918 91% => OK
dale_chall_readability_score: 8.07 8.42419426049 96% => OK
difficult_words: 73.0 63.6247240618 115% => OK
linsear_write_formula: 8.0 10.7273730684 75% => OK
gunning_fog: 8.8 10.498013245 84% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
---------------------
Write the essay in 20 minutes.
Rates: 75.0 out of 100
Scores by essay e-grader: 22.5 Out of 30
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.