"air is forced back into the ballonets by both scooping air from the engine exhaust and using auxiliary blowers. The two main parts of an airship are its gas-containing envelope and a gondola or similar structure slung beneath and containing crew and other equipment. The engines may be mounted in the gondola or elsewhere off the envelope. The basic structure of an airship may be rigid, semi-rigid or non-rigid, as described. The envelope itself is the structure, including textiles that contains the buoyant gas. Internally two ballonets placed in the front part and in the rear part of the hull"
"Fuselage The fuselage (; from the French ""fuselé"" ""spindle-shaped"") is an aircraft's main body section. It holds crew, passengers, and cargo. In single-engine aircraft it will usually contain an engine, as well, although in some amphibious aircraft the single engine is mounted on a pylon attached to the fuselage, which in turn is used as a floating hull. The fuselage also serves to position control and stabilization surfaces in specific relationships to lifting surfaces, which is required for aircraft stability and maneuverability. This type of structure is still in use in many lightweight aircraft using welded steel tube trusses. A"
"Blimp A blimp, or non-rigid airship, is an airship (dirigible) or barrage balloon without an internal structural framework or a keel. Unlike semi-rigid and rigid airships (e.g. Zeppelins), blimps rely on the pressure of the lifting gas (usually helium, rather than hydrogen) inside the envelope and the strength of the envelope itself to maintain their shape. Since blimps keep their shape with internal overpressure, typically the only solid parts are the passenger car (gondola) and the tail fins. A non-rigid airship that uses heated air instead of a light gas (such as helium) as a lifting medium is called a"
"Ballonet A ballonet is an air bag inside the outer envelope of an airship which, when inflated, reduces the volume available for the lifting gas, making it more dense. Because air is also denser than the lifting gas, inflating the ballonet reduces the overall lift, while deflating it increases lift. In this way, the ballonet can be used to adjust the lift as required. Ballonets may typically be used in non-rigid or semi-rigid airships, commonly with multiple ballonets located both fore and aft to maintain balance and to control the pitch of the airship. The image illustrates the principle of"
"Airship An airship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air under its own power. Aerostats gain their lift from large gasbags filled with a lifting gas that is less dense than the surrounding air. In early dirigibles, the lifting gas used was hydrogen, due to its high lifting capacity and ready availability. Helium gas has almost the same lifting capacity and is not flammable, unlike hydrogen, but is rare and relatively expensive. Significant amounts were first discovered in the United States and for a while helium was only used for"
"Aerostat An aerostat (From Greek ἀήρ ""aer"" (air) + στατός ""statos"" (standing) through French) is a lighter than air aircraft that gains its lift through the use of a buoyant gas. Aerostats include unpowered balloons and powered airships. A balloon may be free-flying or tethered. The average density of the craft is lower than the density of atmospheric air, because its main component is one or more gasbags, a lightweight skin containing a lifting gas to provide buoyancy, to which other components such as a gondola containing equipment or people are attached. Especially with airships, the gasbags are often protected"
"They have a minimal structure that keeps the shape jointly with overpressure of the gas envelope. An ""aerostat"" is an aircraft that remains aloft using buoyancy or static lift, as opposed to the aerodyne, which obtains lift by moving through the air. Airships are a type of aerostat. The term ""aerostat"" has also been used to indicate a tethered or moored balloon as opposed to a free-floating balloon. Aerostats today are capable of lifting a payload of 3,000 pounds to an altitude of more than 4.5 kilometers above sea level. They can also stay in the air for extended periods"
"Sky anchor A sky anchor is a system of two balloons in tandem, with a ""zero-pressure"" lifting gas balloon tethered to a superpressure balloon ""anchor"". The gas balloon is filled with a lifting gas and provides the buoyancy, while the superpressure balloon is filled with air, and pressurized to provide the desired ballast weight. In a passive sky anchor, the superpressure balloon is sealed, while in an active system, its pressure can be varied. Both versions have been tested in flight, but have had frequent failures with only occasional successful outcomes. The tandem arrangement makes launching difficult, and this complexity"
"Aircraft cabin An aircraft cabin is the section of an aircraft in which passengers travel. At cruising altitudes of modern commercial aircraft, the surrounding atmosphere is too thin for passengers and crew to breathe without an oxygen mask, so cabins are pressurized at a higher pressure than ambient pressure at altitude. In commercial air travel, particularly in airliners, cabins may be divided into several parts. These can include travel class sections in medium and large aircraft, areas for flight attendants, the galley and storage for in-flight service. Seats are mostly arranged in rows and alleys. The higher the travel class,"
"its carrying bag, laying it out on the ground, and connecting it to the basket and burner. A fan, often gasoline-powered, is used to blow cold (outside) air into the envelope. The cold air partially inflates the balloon to establish its basic shape before the burner flame is aimed into the mouth heating the air inside. A crew member stationed opposite the mouth, holds a rope (crown line) tied to the apex (crown) of the envelope. Some balloons, AX7 and larger, may have two (or more) crown lines. The ""crown-man"" role is twofold: one is to prevent the envelope from"
"enhanced lift. Aerostat An aerostat (From Greek ἀήρ ""aer"" (air) + στατός ""statos"" (standing) through French) is a lighter than air aircraft that gains its lift through the use of a buoyant gas. Aerostats include unpowered balloons and powered airships. A balloon may be free-flying or tethered. The average density of the craft is lower than the density of atmospheric air, because its main component is one or more gasbags, a lightweight skin containing a lifting gas to provide buoyancy, to which other components such as a gondola containing equipment or people are attached. Especially with airships, the gasbags are"
"Hovercraft A hovercraft, also known as an air-cushion vehicle or ACV, is an amphibious craft capable of travelling over land, water, mud, ice, and other surfaces. Hovercraft use blowers to produce a large volume of air below the hull (air cushion) that is slightly above atmospheric pressure. The pressure difference between the higher pressure air below the hull and lower pressure ambient air above it produces lift, which causes the hull to float above the running surface. For stability reasons, the air is typically blown through slots or holes around the outside of a disk- or oval-shaped platform, giving most"
"commence and five further airships were produced.- The Skyship 500 consists of a polyester fabric envelope, retaining helium gas, and carrying a gondola for the control cabin, passenger cabin, propulsion systems and ballast (fixed and jettison-able). The envelope is of a traditional streamlined shape with cruciform tail surfaces which carry rudder and elevator control surfaces for yaw and pitch. The undercarriage consists of a castoring twin-wheeled oleo-pneumatic strut at the rear of the gondola, with ground handling ropes for ground crew to manoeuvre the airship on the ground. The nose-cone of the envelope also carries the mooring point which can"
"Bathyscaphe A bathyscaphe ( or ) is a free-diving self-propelled deep-sea submersible, consisting of a crew cabin similar to a bathysphere, but suspended below a float rather than from a surface cable, as in the classic bathysphere design. The float is filled with gasoline because it is readily available, buoyant, and, for all practical purposes, incompressible. The incompressibility of the gasoline means the tanks can be very lightly constructed, since the pressure inside and outside the tanks equalises and they are not required to withstand any pressure differential at all. By contrast, the crew cabin must withstand a huge pressure"
"base. Ordnance passed through the envelope without causing critical helium loss. In all instances of light armament fire evaluated under both test and live conditions, the airship was able to complete its mission and return to base. Airship An airship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air under its own power. Aerostats gain their lift from large gasbags filled with a lifting gas that is less dense than the surrounding air. In early dirigibles, the lifting gas used was hydrogen, due to its high lifting capacity and ready availability. Helium"
"modern-day Cloudhopper designs, the burner controls are mounted at the bottom of the burner, like on regular passenger-carrying hot air balloons. Hopper balloon A hopper balloon (simply hopper) is a small, one-person hot air balloon. Unlike a conventional hot air balloon where people ride inside a basket, there is no basket on a hopper balloon. Instead, the hopper pilot usually sits on a seat or wears a harness similar to a parachute harness. Hoppers are typically flown for recreation. These aircraft are sometimes called ""Cloud Hoppers"" or ""Cloudhoppers."" However, these terms formally refer to the products of a particular manufacturer,"
"Hot air balloon A hot air balloon is a lighter-than-air aircraft consisting of a bag, called an envelope, which contains heated air. Suspended beneath is a gondola or wicker basket (in some long-distance or high-altitude balloons, a capsule), which carries passengers and a source of heat, in most cases an open flame caused by burning liquid propane. The heated air inside the envelope makes it buoyant since it has a lower density than the colder air outside the envelope. As with all aircraft, hot air balloons cannot fly beyond the atmosphere. Unlike gas balloons, the envelope does not have to"
"occur so quickly that recovery can be provided only by automatic control systems. In the late 1960s, several experimental ground facilities were developed to evaluate regenerative life support systems for crewed space flight. Cabin (ship) A cabin or berthing is an enclosed space generally on a ship or an aircraft. A cabin which protrudes above the level of a ship's deck may be referred to as a deckhouse. In sailing ships, the officers and paying passengers would have an individual or shared cabin. The captain or commanding officer would occupy the ""great cabin"" that normally spanned width of the stern"
"the aircraft's center of gravity, or in a balloon as a buoyancy compensator. If a cargo vessel (such as a tanker, bulk carrier or container ship) wishes to travel empty or partially empty to collect a cargo, it must travel ""in ballast"". This keeps the vessel in trim, and keeps the propeller and rudder submerged. Typically, being ""in ballast"" will mean flooding the ballast tanks with sea water. Serious problems arise when the ballast water is discharged, as water-borne organisms may create havoc when deposited in new environments. Ballast Ballast is material that is used to provide stability to a"
"balloon ever flown since the golden age of airships in 1930s. The name Cloudhopper is often used to refer to a one-person hot air balloon where the pilot sits in a harness or small seat. There is often a propane tank behind the pilot's back, and the burner is on a frame above the pilot's head. Often the balloon's burner, tank, and pilot's harness can swivel independently of the hot air balloon envelope, to let the pilot turn to any direction in flight and for landing. The term ""Cloudhopper"" was originally coined and trademarked by British balloonist Colin Prescot. The"
"approximately 100,000ft (30.48km) above Earth inside a pressurized spacecraft lofted by a helium-filled high-altitude balloon. The flight vehicle will carry six passengers and two crew on an approximately five hour flight (from liftoff to touchdown). The flight experience is intended to give passengers a wide-angle and long-duration view of the curvature of the Earth against the blackness of space. The pressurized spacecraft is planned to be outfitted with a restroom, minibar, and communications capabilities for communicating with family and friends below in real-time . Taber is a co-founder and served as CEO for over 20 years. He was the Principal"
"the wind. A round balloon is unstable and bobs about in strong winds, so the kite balloon was developed with an aerodynamic shape similar to a non-rigid airship. Both kite balloons and non-rigid airships are sometimes called ""blimps"". Notable uses of tethered balloons include observation balloons and barrage balloons and notable uses of untethered balloons include espionage balloons and fire balloons. An airship is a powered, free-flying aerostat that can be steered. Airships divide into rigid, semi-rigid and non-rigid types, with these last often known as Blimps. A rigid airship has an outer framework or skin surrounding the lifting gas"
"Flight attendant Flight attendants or cabin crew (also known as stewards/stewardesses, air hosts/hostesses, cabin attendants) are members of an aircrew employed by airlines primarily to ensure the safety and comfort of passengers aboard commercial flights, on select business jet aircraft, and on some military aircraft. The role of a flight attendant derives from that of similar positions on passenger ships or passenger trains, but it has more direct involvement with passengers because of the confined quarters on aircraft. Additionally, the job of a flight attendant revolves around safety to a much greater extent than those of similar staff on other"
"half-angle (see Atmospheric reentry). The capsule consisted of two structures - an outer aeroshell, which supported the ablative heatshield (thermal protection system), and an inner pressurized cylinder containing the crew, systems, and cargo space. Most of the spacecraft systems were at the front of the cylinder, up against the front bulkhead. The crew were seated in one row near the rear bulkhead and access hatch, with 2 ""crew"" seats on the sides with flight controls on the rear bulkhead and one passenger in the middle. Cargo was carried in the middle of the capsule, at the capsule's center of gravity,"
"Cabin (ship) A cabin or berthing is an enclosed space generally on a ship or an aircraft. A cabin which protrudes above the level of a ship's deck may be referred to as a deckhouse. In sailing ships, the officers and paying passengers would have an individual or shared cabin. The captain or commanding officer would occupy the ""great cabin"" that normally spanned width of the stern with large windows. On a warship, it would be separated from the rest of the ship, and further subdivided into day and night cabins with movable panels that could be removed in time"
"Airsign Airship Group is the owner and operator of 8 of these active ships, including the Hood Blimp, DirecTV blimp, and the MetLife blimp. Manufacturers in many different countries have built blimps in many different designs. Some examples include: Blimp A blimp, or non-rigid airship, is an airship (dirigible) or barrage balloon without an internal structural framework or a keel. Unlike semi-rigid and rigid airships (e.g. Zeppelins), blimps rely on the pressure of the lifting gas (usually helium, rather than hydrogen) inside the envelope and the strength of the envelope itself to maintain their shape. Since blimps keep their shape"
"by an outer envelope. Aerostats are so named because they use aerostatic lift which is a buoyant force that does not require movement through the surrounding air mass. This contrasts with the heavy aerodynes that primarily use aerodynamic lift which requires the movement of a wing surface through the surrounding air mass. The term has also been used in a narrower sense, to refer to the statically tethered balloon in contrast to the free-flying airship. This article uses the term in its broader sense. In conventional usage, the term aerostat refers to any aircraft that remains aloft primarily using aerostatic"
"the common before troops managed to grab the ropes and secure the airship. The airship was towed to a balloon works shed specially built to house it. It was soon realised it would be a close fit but as it had been measured to fit for the ""Morning Post"" all that was required was that care was taken in moving the airship into the shed. With all but ten feet inside the shed, a large hiss was heard as the envelope had caught on a girder. A number of troops were under the airship as it collapsed but nobody was"
"a balloon within a balloon. The outer balloon represents the airship's outer envelope or gasbag, while the red inner balloon represents the ballonet. In an airship the ballonet would be much smaller relative to the size of the gasbag; for example, in the French airship Lebaudy Patrie the volume of the ballonet was approximately one-fifth that of the envelope. The ballonet was first described in 1783 by Jean Baptiste Meusnier, then a lieutenant in the French Army. However his own airship project was unsuccessful. In 1784 professor Jacques Charles and the Robert brothers built an elongated, steerable craft that followed"
"Hopper balloon A hopper balloon (simply hopper) is a small, one-person hot air balloon. Unlike a conventional hot air balloon where people ride inside a basket, there is no basket on a hopper balloon. Instead, the hopper pilot usually sits on a seat or wears a harness similar to a parachute harness. Hoppers are typically flown for recreation. These aircraft are sometimes called ""Cloud Hoppers"" or ""Cloudhoppers."" However, these terms formally refer to the products of a particular manufacturer, specifically Lindstrand Balloons. Nonetheless, ""Cloudhopper"" is used by many people as a genericized trademark, which refers to all craft of this"
"Empennage The empennage ( or ), also known as the tail or tail assembly, is a structure at the rear of an aircraft that provides stability during flight, in a way similar to the feathers on an arrow. The term derives from the French language word ""empenner"" which means ""to feather an arrow"". Most aircraft feature an empennage incorporating vertical and horizontal stabilising surfaces which stabilise the flight dynamics of yaw and pitch, as well as housing control surfaces. In spite of effective control surfaces, many early aircraft that lacked a stabilising empennage were virtually unflyable. Even so-called ""tailless aircraft"""
"Cockpit A cockpit or flight deck is the area, usually near the front of an aircraft or spacecraft, from which a pilot controls the aircraft. The cockpit of an aircraft contains flight instruments on an instrument panel, and the controls that enable the pilot to fly the aircraft. In most airliners, a door separates the cockpit from the aircraft cabin. After the September 11, 2001 attacks, all major airlines fortified their cockpits against access by hijackers. The word ""cockpit"" was originally a sailing term for the coxswain's station in a Royal Navy ship, and later the location of the ship's"
"Tethered balloon A tethered, moored or captive balloon is a balloon that is restrained by one or more tethers attached to the ground and so it cannot float freely. The base of the tether is wound around the drum of a winch, which may be fixed or mounted on a vehicle, and is used to raise and lower the balloon. A balloon is a form of aerostat, along with the powered free-flying airship, although the American GAO has used the term ""aerostat"" to describe a tethered balloon in contrast to the powered airship. Tethered balloons have been used for advertising,"