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  2. List of wind tunnels - Wikipedia

    en.wikipedia.org/wiki/List_of_wind_tunnels

    7' x 5' tunnel 2.1 m (6 ft 11 in) by 1.5 m (4 ft 11 in) R J Mitchell Wind Tunnel 3.5 m (11 ft) by 2.4 m (7 ft 10 in) United Kingdom University of Surrey [17] Operational EnFlo Laboratory meteorological wind tunnel 3.5 m (11 ft) by 1.5 m (4 ft 11 in) by 20 m (66 ft) United Kingdom University of Washington Aeronautical Laboratory, Kirsten Wind ...

  3. Polytunnel - Wikipedia

    en.wikipedia.org/wiki/Polytunnel

    Because of the wide variety of constantly changing designs, in reality there is an entirely continuous spectrum from high tunnels through low tunnels to the simplest row covers, although they are often thought about as discrete steps. Major themes of continuing development are (1) achieving the same results with lighter construction and less ...

  4. Boring test tunnel - Wikipedia

    en.wikipedia.org/wiki/Boring_Test_Tunnel

    On October 5, 2018, the Hawthorne City Council granted an easement for up to 2,600 meters (8,600 ft) of tunnel, in exchange for a structural encroachment fee of $2.5 million. Permission for the first 210 meters (700 ft) of tunnel under SpaceX's own land had been obtained earlier. [11]

  5. List of tunnels in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_tunnels_in_the...

    [2] Blount Tunnel, a rail tunnel near Blount Springs. [3] Brocks Gap Tunnel, a 900-foot-long (270 m) CSX rail tunnel in Hoover near Birmingham, under Shades Mountain. [4] Cooks Springs Tunnel, a Norfolk Southern rail tunnel near Cooks Springs, on the main line between Birmingham and Anniston. [5] Coosa Tunnel a rail tunnel on an active Norfolk ...

  6. Hvalfjörður Tunnel - Wikipedia

    en.wikipedia.org/wiki/Hvalfjörður_Tunnel

    The tunnel is toll free as of 28 September 2018, the date when the tunnel was turned over from the private operator Spölur to the Icelandic Road Administration (Vegagerðin). [1] Previously, the toll for vehicles less than 6 meters (20 ft) in length was ISK 1,000 (USD 9.80). [2] Motorcycles and larger vehicles paid different tolls.

  7. Robertson Tunnel - Wikipedia

    en.wikipedia.org/wiki/Robertson_Tunnel

    The tunnel is 2.9 miles (4.7 kilometers) long [1] and consists of twin 21-foot-diameter (6.4 m) tunnels. There is one station within the tunnel at Washington Park , which at 259 feet (79 m) deep is the deepest subway station in the United States and the fifth-deepest in the world. [ 5 ]

  8. List of long tunnels by type - Wikipedia

    en.wikipedia.org/wiki/List_of_long_tunnels_by_type

    10 km (6.2 mi) 2009/2011 1* A86 *the two two-lane directions are superimposed (hence duplex) in one tube Lowari Tunnel: Pakistan 8.5 km (5.3 mi) 1975 2017 1 N-45 / Dir-Chitral Highway: Part of a group of two consecutive tunnels: 8.5 km (5.3 mi) and 1.9 km (1.2 mi) Many more tunnels exist that are shorter than 10 kilometres (6 mi)

  9. Intercontinental and transoceanic fixed links - Wikipedia

    en.wikipedia.org/wiki/Intercontinental_and...

    A service road tunnel runs the entire length of the crossing, but is closed to general use and used only during emergencies and for maintenance. Cyclists – both amateur and professional – have crossed the channel via the tunnel on special occasions. [2] There have been proposals at various times for a second channel tunnel of some kind. [3]

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