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Plum Tree Island National Wildlife Refuge

1972 establishments in VirginiaHampton Roads, Virginia geography stubsIUCN Category IVNational Wildlife Refuges in VirginiaProtected areas established in 1972
Protected areas of Poquoson, VirginiaVirginia protected area stubs
Plum Tree Island National Wildlife Refuge, VA. Credit USFWS (11805434276)
Plum Tree Island National Wildlife Refuge, VA. Credit USFWS (11805434276)

The Plum Tree Island National Wildlife Refuge is a National Wildlife Refuge in Poquoson, Virginia, located on the southwestern corner of the Chesapeake Bay. The 3,501-acre (14.17 km2) refuge is located at about the midpoint of the Atlantic Flyway, and is one of four refuges that comprise the Eastern Virginia Rivers National Wildlife Refuge Complex. Prior to being transferred to the jurisdiction of the United States Fish and Wildlife Service in 1972, the preserve's lands were owned by the United States Department of Defense and used as a bombing range. Due to the amount of unexploded ordnance that remains, only the 200-acre (0.81 km2) Cow Island portion of the refuge is open to the public.

Excerpt from the Wikipedia article Plum Tree Island National Wildlife Refuge (License: CC BY-SA 3.0, Authors, Images).

Plum Tree Island National Wildlife Refuge
Old Landfill Road,

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N 37.14 ° E -76.3275 °
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Plum Tree Island National Wildlife Refuge

Old Landfill Road
23662
Virginia, United States
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Plum Tree Island National Wildlife Refuge, VA. Credit USFWS (11805434276)
Plum Tree Island National Wildlife Refuge, VA. Credit USFWS (11805434276)
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Full-Scale Wind Tunnel
Full-Scale Wind Tunnel

The Full-Scale Tunnel (abbreviated FST, also known as the 30-by 60-Foot Tunnel) was a wind tunnel at NASA's Langley Research Center. It was a National Historic Landmark. In 1929, National Advisory Committee for Aeronautics began construction of the world's first full-scale wind tunnel. The design team was led by Smith J. DeFrance. The tunnel was completed in 1931 (dedicated 27 May) at a cost just under $900,000. It was a double-return tunnel capable of moving air at speeds up to 118 miles/hour (190 km/h) through its circuit. It had a 30 ft by 60 ft (9.1 m x 18.3 m) open throat, which is capable of testing aircraft with spans of 40 ft (12.2 m). The wind tunnel was a double-return, atmospheric pressure tunnel with two fans powered by 4,000 hp electric motors. The Vought O3U-1 biplane observation airplane was the first complete airplane tested in the tunnel. After that, it was used to test virtually every high-performance aircraft used by the United States in World War II. For much of the war, when it was operational 24 hours a day, seven days a week, the full-scale tunnel was the only tunnel in the free world large enough to perform these tests. After the war, many types of aircraft were tested in the tunnel including the Harrier jump jet fighter, the F-16, the American supersonic transport, the Space Shuttle and Lunar Landing Test Vehicle. During the 1950s and 1960s, the tunnel was modified and upgraded several times. The principal improvement was adding the ability to test free-flying scale models in the test throat. The wind tunnel was in use through the 2000s, testing procedures such as free-flight and high angle of attack.It was declared a National Historic Landmark in 1985. However, despite this designation and the efforts of some aviation historians, demolition of the tunnel began in 2010. It was documented before its demolition, with the fan blades being salvaged for display. In 2014 its landmark designation was withdrawn and it was removed from the National Register of Historic Places.

Eight-Foot High Speed Tunnel
Eight-Foot High Speed Tunnel

The Eight-Foot High Speed Tunnel, also known as Eight-Foot Transonic Tunnel, was a wind tunnel located in Building 641 of NASA's Langley Research Center in Hampton, Virginia. It was a National Historic Landmark.The tunnel was completed in 1936 at a cost of $36,266,000. Because of its high speed and Bernoulli's principle, the pressure in the test section is much lower than that in the rest of the tunnel. This required a structure that could withstand an inward force due to the pressure difference. Instead of steel construction, it was built from reinforced concrete with walls up to 1 ft (0.3 m) thick. This resulted in an "igloo-like" structure at the test section. The wind tunnel was designed as a single-return tunnel capable of moving air at speeds up to a Mach number up to 0.75. It was powered by an 8,000 hp (6,000 kW) electric motor. It was repowered to 16,000 hp (12,000 kW) to give Mach number 1 capability in 1945. In 1947, the speed was increased to a Mach number of 1.2 with the installation of a contoured nozzle. In 1950, a slotted-throat test section was installed, and it was repowered to 25,000 hp (19,000 kW). Because it was the first continuous-flow high-speed tunnel, this tunnel was a landmark in wind tunnel design. This meant it could operate almost indefinitely to produce a high-speed airstream approaching the speed of sound. And it was large enough to accommodate large-scale models and even full-scale aircraft sections. In 1950, the tunnel was the first in the world to be modified to incorporate a slotted throat design. This revolutionary design gave researchers their first accurate data on airframe performance in the transonic range. The tunnel was deactivated in 1956, when a new 8-foot (2.4 m) tunnel was built near it. The wind tunnel was used for critical tests that validated the area rule for the design of supersonic aircraft. This said that the fuselage of the aircraft should narrow at the wings and expand at their trailing edges. This resulted in "wasp-waisted" aircraft. The tunnel was taken out of service in 1956. It was declared a National Historic Landmark in 1985. In 2011, Building 641, which housed the tunnel, was demolished. The landmark designation was withdrawn in 2014, and it was removed from the National Register of Historic Places.There are additional photographs of the wind tunnel in the Historic American Engineering Record collection.