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.
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.
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.
The article states that airships offer numerous advantages over airplanes and helicopters, which may lead to their popularity and cites three of such advantages. However, the professor disagrees with this notion stating that it's unlikely for airships to become popular again.
First, the passage claims that the fuel needed by airships is considerably less than other aircrafts making them a more cost effective as a means of travel. The lecturer admites this fact but, points out that airships require specific type of gas namely, Hydrogen and Helium. He explains that Hydrogen is highly flammable, thus its usage has led to many tragic accidents before. Eventhough Helium is safer it is hard to acquire, expensive and has less lifting power than Hydrogen. Therefore, it is hard to balance safety and cost by using airships.
Second, the reading posits that airships are better for traveling and carrying heavy loads to and from hard to reach locations. The professor refutes this point by explaining that airships don't weight much; hence when traveling and carrying to hard to reach locations they need to be kept steady so there would be no damages due to wind. Consequently, airships are not a good option for such travels.
Third, The article states that airships can replace satelites since they can rise high above the surface. The professorrenounces this notion pointing out that airships can only rise fourteen kilometers above surface and in high altitudes wind is very strong for the airships to resist this force they need to use up a considerable amount of fuel. Hence, they would need to descend often to refuel. Therefore, their positioning would be interrupted many times making them useless as satelites.
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Grammar and spelling errors:
Line 3, column 189, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: don't
... this point by explaining that airships dont weight much; hence when traveling and c...
^^^^
Line 4, column 373, Rule ID: ADVERB_WORD_ORDER[9]
Message: The adverb 'often' is usually put before the verb 'descend'.
Suggestion: often descend
...ount of fuel. Hence, they would need to descend often to refuel. Therefore, their positioning...
^^^^^^^^^^^^^
Transition Words or Phrases used:
but, consequently, first, hence, however, if, may, second, so, therefore, third, thus
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 11.0 10.4613686534 105% => OK
Auxiliary verbs: 10.0 5.04856512141 198% => OK
Conjunction : 10.0 7.30242825607 137% => OK
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 27.0 22.412803532 120% => Less pronouns wanted
Preposition: 33.0 30.3222958057 109% => OK
Nominalization: 1.0 5.01324503311 20% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1445.0 1373.03311258 105% => OK
No of words: 280.0 270.72406181 103% => OK
Chars per words: 5.16071428571 5.08290768461 102% => OK
Fourth root words length: 4.09062348924 4.04702891845 101% => OK
Word Length SD: 2.64410925937 2.5805825403 102% => OK
Unique words: 171.0 145.348785872 118% => OK
Unique words percentage: 0.610714285714 0.540411800872 113% => OK
syllable_count: 441.9 419.366225166 105% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 14.0 13.0662251656 107% => OK
Sentence length: 20.0 21.2450331126 94% => OK
Sentence length SD: 52.1086482696 49.2860985944 106% => OK
Chars per sentence: 103.214285714 110.228320801 94% => OK
Words per sentence: 20.0 21.698381199 92% => OK
Discourse Markers: 6.07142857143 7.06452816374 86% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 7.0 4.33554083885 161% => OK
Sentences with negative sentiment : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 3.0 4.27373068433 70% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.144726121457 0.272083759551 53% => OK
Sentence topic coherence: 0.0496845292958 0.0996497079465 50% => OK
Sentence topic coherence SD: 0.0338927495738 0.0662205650399 51% => OK
Paragraph topic coherence: 0.0861313498674 0.162205337803 53% => OK
Paragraph topic coherence SD: 0.0198623171614 0.0443174109184 45% => 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: 12.9 13.3589403974 97% => OK
flesch_reading_ease: 51.18 53.8541721854 95% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 11.1 11.0289183223 101% => OK
coleman_liau_index: 12.65 12.2367328918 103% => OK
dale_chall_readability_score: 9.03 8.42419426049 107% => OK
difficult_words: 78.0 63.6247240618 123% => OK
linsear_write_formula: 11.0 10.7273730684 103% => OK
gunning_fog: 10.0 10.498013245 95% => OK
text_standard: 13.0 11.2008830022 116% => OK
What are above readability scores?
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Rates: 76.6666666667 out of 100
Scores by essay e-grader: 23.0 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.