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Ridge Soaring Gliderport
Ridge Soaring Gliderport was a public-use Glider (sailplane), glider airport located two nautical miles (4 km) southwest of the central business district of Unionville, Centre County, Pennsylvania, Unionville, in Centre County, Pennsylvania, Centre County, Pennsylvania, United States. It was privately owned by Knauff & Grove, Inc. This Fixed base operator, FBO airport was world-famous for ridge soaring, ridge, thermal and lee waves, wave gliding, soaring. It was located on U.S. Route 220 (alternate) 8 miles south of Interstate 80, between Unionville and Julian, Pennsylvania, Julian, at the base of the Bald Eagle Mountain ridge. It was approximately 10 miles from State College, Pennsylvania, State College and approximately midway between Altoona, Pennsylvania, Altoona and Lock Haven, Pennsylvania, Lock Haven in the Bald Eagle Valley. Visitors could look at an entire wall of U.S. National and World records that have been set from this airfield. Facilities and aircraft Rid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionville, Centre County, Pennsylvania
Unionville is a borough in Centre County, Pennsylvania, United States. It is part of the Bald Eagle Valley and the State College, Pennsylvania Metropolitan Statistical Area. As of the 2010 census, the borough had a total population of 291. History A Late Woodland village that was occupied between AD 1200 and 1600, now known as the Fisher Farm site, is located along Bald Eagle Creek on Unionville's western edge. The village was laid out in 1848 at the site of temporary lumber camps in the Bald Eagle Valley. Unionville became the third borough incorporated in Centre County in 1859, and became a station along the Bald Eagle Valley Railroad in 1864. In the 1860s a pink Methodist church was built in the borough. In 2015 it became an art exhibit known as Marry's Pink Church. In 2024 Unionville flooded due to heavy rains from Tropical Storm Debby. Historic District In 1979, the Unionville Historic District was listed on the National Register of Historic Places. The district ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gliding
Gliding is a recreational activity and competitive air sports, air sport in which pilots fly glider aircraft, unpowered aircraft known as Glider (sailplane), gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to remain airborne. The word ''soaring'' is also used for the sport. Gliding as a sport began in the 1920s. Initially the objective was to increase the duration of flights but soon pilots attempted cross-country flights away from the place of launch. Improvements in aerodynamics and in the understanding of weather phenomena have allowed greater distances at higher average speeds. Long distances are now flown using any of the main sources of rising air: Ridge Lift, ridge lift, thermals and lee waves. When conditions are favourable, experienced pilots can now fly hundreds of kilometres before returning to their home airfields; occasionally flights of more than are achieved. Some competitive pilots fly in races around pre-defined course ... [...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. Aircraft using power components are referred to as powered flight. 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 The largest manufacturer of turboprop engines for general aviation is Pratt & Whitney. General Electric announced in 2015 entrance into the market. Development history * 1903: Manly-Balzer engine sets standards for later radial engines. * 1910: Coandă-1910, an unsuccessful ducted fan aircraft exhibited at Paris Aero Salon, powered by a piston engine. The aircraft never flew, but a patent was filed for routing exhaust gases into the duct to augment thrust. * 1914: Auguste Rateau suggests using exhaust-powered compressor – a turbocharger – to improve high-altitude performance; not accepted after the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glider Aircraft
A glider is a fixed-wing aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose gliding flight, free flight does not depend on an engine. Most gliders do not have an engine, although motor-gliders have small engines for extending their flight when necessary by sustaining the altitude (normally a sailplane relies on rising air to maintain altitude) with some being powerful enough to take off by Motor glider, self-launch. There are a wide variety of types differing in the construction of their wings, aerodynamic efficiency, location of the pilot, controls and intended purpose. Most exploit lift (soaring), meteorological phenomena to maintain or gain height. Gliders are principally used for the air sports of gliding, hang gliding and paragliding. However some spacecraft have been designed to descend as gliders and in the past military gliders have been used in warfare. Some simple and familiar types of glider are toys such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Aviation
General aviation (GA) is defined by the International Civil Aviation Organization (ICAO) as all civil aviation aircraft operations except for commercial air transport or aerial work, which is defined as specialized aviation services for other purposes. However, for statistical purposes, ICAO uses a definition of general aviation which includes aerial work. General aviation thus represents the " private transport" and recreational components of aviation, most of which is accomplished with light aircraft. Definition The International Civil Aviation Organization (ICAO) defines civil aviation aircraft operations in three categories: General Aviation (GA), Aerial Work (AW) and Commercial Air Transport (CAT). Aerial work operations are separated from general aviation by ICAO by this definition. Aerial work is when an aircraft is used for specialized services such as agriculture, construction, photography, surveying, observation and patrol, search and rescue, and aerial adver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grass
Poaceae ( ), also called Gramineae ( ), is a large and nearly ubiquitous family (biology), family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos, the grasses of natural grassland and species cultivated in lawns and pasture. The latter are commonly referred to collectively as grass. With around 780 genera and around 12,000 species, the Poaceae is the fifth-largest :plant families, plant family, following the Asteraceae, Orchidaceae, Fabaceae and Rubiaceae. The Poaceae are the most economically important plant family, including staple foods from domesticated cereal crops such as maize, wheat, rice, oats, barley, and millet for people and as forage, feed for livestock, meat-producing animals. They provide, through direct human consumption, just over one-half (51%) of all dietary energy; rice provides 20%, wheat supplies 20%, maize (corn) 5.5%, and other grains 6%. Some members of the Poaceae are used as building materials ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Runway
In aviation, a runway is an elongated, rectangular surface designed for the landing and takeoff of an aircraft. Runways may be a human-made surface (often asphalt concrete, asphalt, concrete, or a mixture of both) or a natural surface (sod, grass, soil, dirt, gravel, ice, sand or road salt, salt). Runways, taxiways and Airport apron, ramps, are sometimes referred to as "tarmac", though very few runways are built using Tarmacadam, tarmac. Takeoff and landing areas defined on the surface of water for seaplanes are generally referred to as waterways. Runway lengths are now International Civil Aviation Organization#Use of the International System of Units, commonly given in meters worldwide, except in North America where feet are commonly used. History In 1916, in a World War I war effort context, the first concrete-paved runway was built in Clermont-Ferrand in France, allowing local company Michelin to manufacture Bréguet Aviation military aircraft. In January 1919, aviation p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mean Sea Level
A mean is a quantity representing the "center" of a collection of numbers and is intermediate to the extreme values of the set of numbers. There are several kinds of means (or "measures of central tendency") in mathematics, especially in statistics. Each attempts to summarize or typify a given group of data, illustrating the magnitude and sign of the data set. Which of these measures is most illuminating depends on what is being measured, and on context and purpose. The ''arithmetic mean'', also known as "arithmetic average", is the sum of the values divided by the number of values. The arithmetic mean of a set of numbers ''x''1, ''x''2, ..., x''n'' is typically denoted using an overhead bar, \bar. If the numbers are from observing a sample of a larger group, the arithmetic mean is termed the '' sample mean'' (\bar) to distinguish it from the group mean (or expected value) of the underlying distribution, denoted \mu or \mu_x. Outside probability and statistics, a wide rang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elevation
The elevation of a geographic location (geography), ''location'' is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational equipotential surface, surface (see Geodetic datum#Vertical datum, Geodetic datum § Vertical datum). The term ''elevation'' is mainly used when referring to points on the Earth's surface, while ''altitude'' or ''geopotential height'' is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and ''three-dimensional space, depth'' is used for points below the surface. Elevation is not to be confused with the distance from the center of the Earth. Due to the equatorial bulge, the summits of Mount Everest and Chimborazo (volcano), Chimborazo have, respectively, the largest elevation and the largest ECEF, geocentric distance. Aviation In aviation, the term ''elevation'' or ''aerodrome elevation'' is defined by the IC ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bald Eagle Valley
Bald Eagle Valley is a low-lying area in Pennsylvania that drains into Bald Eagle Creek between the Allegheny Front and Bald Eagle Mountain, south of the West Branch Susquehanna River, in the Ridge-and-valley Appalachians. The valley is located southwest of West Branch Susquehanna Valley and includes Williamsport, Nittany Valley, and State College in the central portion of Centre County and southern portion of Clinton County. The valley runs from Port Matilda down to Lock Haven, and it includes most of the Bald Eagle Area School District and Bald Eagle Township. Bald Eagle State Park is in the valley; the park includes the Joseph Foster Sayers Reservoir around Howard, a prominent topographic feature formed by damming Bald Eagle Creek. Principal towns in the Bald Eagle Valley From southwest to northeast, downstream along Bald Eagle Creek: * Port Matilda * Julian * Unionville * Milesburg *Howard * Beech Creek * Mill Hall * Lock Haven Agriculture In the upper valley, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lock Haven, Pennsylvania
Lock Haven is a city in, and the county seat of, Clinton County, in the U.S. state of Pennsylvania. Located near the confluence of the West Branch Susquehanna River and Bald Eagle Creek, it is the principal city of the Lock Haven Micropolitan Statistical Area, itself part of the Williamsport–Lock Haven combined statistical area. At the 2020 census, Lock Haven's population was 8,108. Built on a site long favored by pre-Columbian peoples, Lock Haven began in 1833 as a timber town and a haven for loggers, boatmen, and other travelers on the river or the West Branch Canal. Resource extraction and efficient transportation financed much of the city's growth through the end of the 19th century. In the 20th century, a light-aircraft factory, a college, and a paper mill, along with many smaller enterprises, drove the economy. Frequent floods, especially in 1972, damaged local industry and led to a high rate of unemployment in the 1980s. The city has three sites on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Altoona, Pennsylvania
Altoona ( ) is a city in Blair County, Pennsylvania, United States. The population was 43,963 at the time of the 2020 United States census, 2020 census. It is the principal city of the Altoona Metropolitan statistical area, metropolitan area, which includes all of Blair County and was recorded as having a population of 122,823. Altoona was established in 1849 by the Pennsylvania Railroad. Having grown around the railroad industry, the city has worked to recover from Deindustrialization, industrial decline and Urban sprawl, urban decentralization experienced in recent decades. The city is home to the Altoona Curve baseball team of the Eastern League (1938–present), Eastern League, which is the AA affiliate of the Pittsburgh Pirates Major League Baseball team. They play at Peoples Natural Gas Field in Altoona. The Altoona Symphony Orchestra has called Altoona home since 1928. Prominent landmarks include the Horseshoe Curve (Pennsylvania), Horseshoe Curve, the Railroaders Mem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
