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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.
How does helium make air-balloons fly?
Helium is less dense than nitrogen and oxygen, the main components or air. Any given volume of helium has less mass than the same volume of air at the same pressure. Balloons filled with helium therefor rise through air just as air bubbles rise up through denser, heavier water. A helium filled ballon expands as it rises displacing an increasing volume of air as it goes. This is because the air around it becomes thinner and less dense with altitude. Air pressure at sea level is 1 atmosphere or about fourteen and a half pounds per square inch dropping to zero at the edge of space. Hydrogen is less dense than helium and therefor has a greater lifting capacity per unit volume than helium. Both were used for airships but helium was much safer because it's not flammable like hydrogen. The altitude of airships was controlled by venting (releasing) excess gas to stop them rising too far or too fast. They also carried lots of water ballast. It would be dumped as needed to stop the airship from descending too fast. Airships and submarines use similar methods to fix their vertical positions. Whether it's in liquid or gas, it's all about density, pressure, and gravity. Got to fly ;-) M.G.S.C.A.Alexander www.limitbuster.com
Are the Hindenburg and the goodyear blimp examples of hot air balloons?
No. All three are so-called "lighter than air" machines, because they're filled with gases that make tham buoyant in normal atmosphere. But the gases are different. The Hindenburg was filled with hydrogen, and was destroyed in 1937, in a catastrophe so deadly and so graphic that hydrogen was never again used to float airships. Blimps today, including the Goodyears, are floated with helium. And hot-air balloons, as the name implies, are floated with . . . . .
What is the main element in protein?
hidrogen
Which gases were parts of earths original atmosphere?
HIDROGEN
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 is the most powerful type of nuclear bomb?
The Hidrogen Bomb.
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.
Is Jupiter only gas?
No. Its core is made out of Rock, Metal, and Hidrogen compounds.
Which element is also used in airships?
Hydrogen and helium are two elements that are kinda-sorta interchangeable in airships.
