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What is an aircraft the achieve forward propulsion by expelling a stream of fluid called?
airships
Why don't they use hydrogen gas in airships nowadays?
hydrogen is VERY flammable, which makes it an unpleasant choice.
How do airships fly?
Just like how a ship floats in the sea because it weighs less than the amount of water it displaces... an airship weighs less than the amount of air it displaces.This is accomplished through the use of lighter-than-air gasses such as helium. In the past hydrogen was used for this, but due to its high flammability this is no longer done. Helium is completely non-flammable and thus is perfectly safe lifting agent.The pilot adjusts the airships bouyancy by either adding more gas, venting gas or by dropping ballast (usually water tanks or sandbags) Once the airship has neutral bouyancy, it can be steered using the elevators and rudders.It is similar in principle to a submarine, which uses 'air' in the ballast to float to the surface and water to descend. Airships rise when 'air' in their hull tanks is replaced with a 'lighter than air' gas, such as Hydrogen or Helium.Just like how a ship floats in the sea because it weighs less than the amount of water it displaces... an airship weighs less than the amount of air it displaces.This is accomplished through the use of lighter-than-air gasses such as helium. In the past hydrogen was used for this, but due to its high flammability this is no longer done. Helium is completely non-flammable and thus is perfectly safe lifting agent.The pilot adjusts the airships bouyancy by either adding more gas, venting gas or by dropping ballast (usually water tanks or sandbags) Once the airship has neutral bouyancy, it can be steered using the elevators and rudders.It is similar in principle to a submarine, which uses 'air' in the ballast to float to the surface and water to descend. Airships rise when 'air' in their hull tanks is replaced with a 'lighter than air' gas, such as Hydrogen or Helium.
What is run off coefficient?
Run off is when water run off our falls of hill ,moantins ,rocks
Which is higher run or start winding?
run. no ITs the start
What are the most famous airships?
The most famous airships are Hendenburg and Zeppelin.
Do airships use gas?
Airships do use gas, to provide lift.
What shape are most airships?
Airships are usually the shape of a oval. They look like blimps. Airships are usually filled with helium to keep them afloat.
What gas helps airships float?
the gas that helps airships is i hate you wikianswers.com
What flammable gas used to be used in airships?
Hydrogen used to be used in airships.
When was Curly's Airships created?
Curly's Airships was created on 2000-10-05.
Why is gas no longer used for airships?
gas is still used in airships to provide lift.
Which element is also used in airships?
Hydrogen and helium are two elements that are kinda-sorta interchangeable in airships.
Why were airships invented?
Germany
What is the name of a movie with airships?
Hayao Miyazaki has featured airships in several of his films, including Nausicaa of the Valley of the Wind and Castle in the sky. You can also find airships in Howl's moving castle. Here is a website on some anime with airships: http://animeworld.com/related/airships.html Also, here is a website with a lot of other movies with airships: http://spot.colorado.edu/~dziadeck/airship/films.htm
What element is used in airships that is dangerous?
Hydrogen was once used to fill airships. Quite dangerous due to how flammable it is.
Why are airships safer than today they were in the past?
Modern airships use Helium for lift which is non-combustible whereas in the past airships such as the Hindenburg used Hydrogen for lift which is highly combustible. In addition, modern airships take advantage of new alloys and polymers which give them a much stronger airframe.
