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Banner Towing
Aerial advertising is a form of advertising that incorporates the use of flogos, manned aircraft, or drones to create, transport, or display, advertising media. The media can be ''static'', such as a banner, logo, lighted sign or sponsorship branding. It can also be ''dynamic'', such as animated lighted signage, skywriting, or audio. Prior to World War II, aviation pioneer Arnold Sidney Butler, the owner and operator of Daniel Webster Airport (New Hampshire) utilizing his fleet of J3 Cubs, created banner towing and was credited with a number of inventions and aircraft modifications used to pick up and release banners. At the start of World War II, the government took over the airstrip for military training. Afterward, Butler moved his aircraft to Florida and formed Circle-A Aviation where he continued his banner towing business. Still today, many of his aircraft remain in service and can be seen in the skies over Miami and Hollywood, Florida. Aerial advertising is perceived by m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerostats
An aerostat (, via 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 (which could be heated air or any gas of lower density than air) 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 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, resulting in VTOL ability. 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 bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller (aircraft)
An aircraft propeller, also called an airscrew,Beaumont, R.A.; ''Aeronautical Engineering'', Odhams, 1942, Chapter 13, "Airscrews". converts rotary motion from an engine or other power source into a swirling slipstream which pushes the propeller forwards or backwards. It comprises a rotating power-driven hub, to which are attached several radial airfoil-section blades such that the whole assembly rotates about a longitudinal axis. The blade pitch may be fixed, manually variable to a few set positions, or of the automatically variable "constant-speed" type. The propeller attaches to the power source's driveshaft either directly or through reduction gearing. Propellers can be made from wood, metal or composite materials. Propellers are most suitable for use at subsonic airspeeds generally below about , although supersonic speeds were achieved in the McDonnell XF-88B experimental propeller-equipped aircraft. Supersonic tip-speeds are used in some aircraft like the Tupolev Tu-95 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Altitude
Altitude or height (also sometimes known as depth) is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the context (e.g., aviation, geometry, geographical survey, sport, or atmospheric pressure). Although the term ''altitude'' is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage. Vertical distance measurements in the "down" direction are commonly referred to as depth. In aviation In aviation, the term altitude can have several meanings, and is always qualified by explicitly adding a modifier (e.g. "true altitude"), or implicitly through the context of the communication. Parties exchanging altitude information must be clear which definition is being used. Aviation altitude is measured using either mean sea level (MSL) or local ground level (above ground level, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drag (physics)
In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers (or surfaces) or between a fluid and a solid surface. Unlike other resistive forces, such as dry friction, which are nearly independent of velocity, the drag force depends on velocity. Drag force is proportional to the velocity for low-speed flow and the squared velocity for high speed flow, where the distinction between low and high speed is measured by the Reynolds number. Even though the ultimate cause of drag is viscous friction, turbulent drag is independent of viscosity. Drag forces always tend to decrease fluid velocity relative to the solid object in the fluid's path. Examples Examples of drag include the component of the net aerodynamic or hydrodynamic force acting opposite to the d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Billboard
A billboard (also called a hoarding in the UK and many other parts of the world) is a large outdoor advertising structure (a billing board), typically found in high-traffic areas such as alongside busy roads. Billboards present large advertisements to passing pedestrians and drivers. Typically brands use billboards to build their brands or to push for their new products. The largest ordinary-sized billboards are located primarily on major highways, expressways or principal arterials, and command high-density consumer exposure (mostly to vehicular traffic). These afford greatest visibility due not only to their size, but because they allow creative "customizing" through extensions and embellishments. Posters are the other common form of billboard advertising, located mostly along primary and secondary arterial roads. Posters are a smaller format and are viewed principally by residents and commuter traffic, with some pedestrian exposure. Advertising style Billboard advertisem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banner
A banner can be a flag or another piece of cloth bearing a symbol, logo, slogan or another message. A flag whose design is the same as the shield in a coat of arms (but usually in a square or rectangular shape) is called a banner of arms. Also, a bar-shaped piece of non-cloth advertising material sporting a name, slogan, or other marketing message is also a banner. Banner-making is an ancient craft. Church banners commonly portray the saint to whom the church is dedicated. The word derives from Old French ''baniere'' (modern french: bannière), from Late Latin ''bandum'', which was borrowed from a Germanic source (compare got, 𐌱𐌰𐌽𐌳𐍅𐌰, translit=bandwa). Cognates include Italian ''bandiera'', Portuguese ''bandeira'', and Spanish ''bandera''. Vexillum The vexillum was a flag-like object used as a military standard by units in the Ancient Roman army. The word ''vexillum'' itself is a diminutive of the Latin ''velum'', meaning a sail, which confirms the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grapple (tool)
A grapple is a hook or claw used to catch or hold something. A ship's anchor is a type of grapple, especially the "grapnel" anchor. A throwing grapple (or "grappling hook") is a multi-pronged hook that is tied to a rope and thrown to catch a grip, as on a parapet or branch of a tree. It may also be used in a boat to "drag" the bottom of a waterway to hook debris or to find missing objects. In logging and other engineering vehicles, a grapple is a hydraulically powered claw with two or more opposing levers that pinch a log or other materials, usually to lift or drag them. The logging grapple used in swing yarding is not moved by hydraulics but by cables. To open and close the tongs of the grapple, two cables are used. One is tensioned and the other is slacked off to move the tongs. A third cable goes back to the tail hold then to the yarder. This third cable is used to pull the grapple out into the setting and to create tension for lifting the grapple in the air. A gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agricultural Aircraft
An agricultural aircraft is an aircraft that has been built or converted for agricultural use – usually aerial application of pesticides (crop dusting) or fertilizer (aerial topdressing); in these roles they are referred to as "crop dusters" or "top dressers". Agricultural aircraft are also used for hydroseeding. The most common agricultural aircraft are fixed-wing, such as the Air Tractor, Cessna Ag-wagon, Gippsland GA200, Grumman Ag Cat, PZL-106 KRUK, M-18 Dromader, PAC Fletcher, Piper PA-36 Pawnee Brave, Embraer EMB 202 Ipanema, and Rockwell Thrush Commander but helicopters are also used. Generally agricultural aircraft have piston or turboprop engines. The only known exception is the Polish PZL M-15 Belphegor which has a jet engine. Early use of aircraft in agriculture Crop dusting with insecticides began in the 1920s in the United States. The first widely used agricultural aircraft were converted war-surplus biplanes, such as the De Havilland Tiger Moth an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft Engine
An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Most aircraft engines are either piston engines or gas turbines, although a few have been rocket powered and in recent years many small UAVs have used electric motors. Manufacturing industry In commercial aviation the major Western manufacturers of turbofan engines are Pratt & Whitney (a subsidiary of Raytheon Technologies), General Electric, Rolls-Royce, and CFM International (a joint venture of Safran Aircraft Engines and General Electric). Russian manufacturers include the United Engine Corporation, Aviadvigatel and Klimov. Aeroengine Corporation of China was formed in 2016 with the merger of several smaller companies. The largest manufacturer of turboprop engines for general aviation is Pratt & Whitney. General Electric announced in 2015 entrance into the market. Development history * 1848: John Stringfellow made a steam engine for a 10-foot wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanley Spencer (aeronaut)
Stanley Edward Spencer (1868–1906) was an early English aeronaut, famous for ballooning and parachuting in several countries, and later for building and flying an airship over London in 1902. Stanley's family had a history of flying: all his five siblings were also aeronauts, with Arthur and Percival the more well-known; his father Charles Green Spencer pioneered gliding and founded the balloon factory C.G. Spencer & Sons in London; and his grandfather Edward had flown balloons with Charles Green since 1836. On 15 September 1898, Stanley piloted a hydrogen balloon for the meteorologist Arthur Berson in what was believed to be a record ascent to 27,500 feet. On 15 November 1899, Spencer ascended with John Mackenzie Bacon and Gertrude Bacon to observe the Leonid meteor shower from above the clouds. Ten hours later, their balloon landed near Neath, South Wales, narrowly avoiding drifting out over the Atlantic. The Spencer airships Spencer's first airship The success of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of British Airships
Airship development in the United Kingdom lagged behind that of Germany and France. The first British designed and built airship was constructed by Stanley Spencer, and on 22 September 1902 was flown from Crystal Palace, London to Ruislip, carrying an advertisement for baby food. A series of more practical airships was constructed by Ernest Willows, the "Willows Number 1" making its first flight near Cardiff on 5 August 1905. The Royal Navy realised that airships similar to Ferdinand von Zeppelin's designs could be of great use and in 1909 ordered construction of a rigid airship. This was completed in 1911 but was wrecked while leaving the hangar before it had flown. Meanwhile, the British Army's School of Ballooning, later the Air Battalion Royal Engineers, acquired a small fleet of semi-rigid and non-rigid airships for observation purposes; they were taken over by the Royal Navy on the creation of the Royal Naval Air Service in 1914. A large number of rigid and non-rigid ai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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