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The Columbia Bar is a system of bars and shoals at the mouth of the Columbia River spanning the U.S. states of Oregon and Washington. It is one of the most dangerous bar crossings in the world, earning the nickname Graveyard of the Pacific. The bar is about 3 miles (5 km) wide and 6 miles (10 km) long. [1]
Sledding in Yyteri, Finland. Children sledding in a park, 18 secs video. Sledding, sledging or sleighing is a winter sport typically carried out in a prone or seated position on a vehicle generically known as a sled (North American), a sledge (British), or a sleigh.
The sled was then accelerated according to the experiment's design requirements for data collection along a length of isolated, precisely level and straight test track. Testing ejection seat systems and technology prior to their use in experimental or operational aircraft was a common application of the rocket sled at Holloman Air Force Base .
The packing and lashing of a sled is an art. Weight must be carried low on the sled, to reduce the risk of tipping. Ingenious structures and materials are used to protect the passengers and hunters build small sleek versions to permit fast day trips. The qamutiik were traditionally hauled by trained dog teams.
The Bars-29 shares up to 90% of its software and hardware with the original Bars radar while being small enough to be installed within the nose of the MiG-29 fighter. [7] The Bars-29 has a detection range of 120 km against a target with an RCS of 5 m 2, 15 targets can be tracked at once when using track while scan mode, with 4 engaged at any ...
Contrails produced from jet engine exhaust are seen at high altitude, directly behind each engine. By contrast, the visible cores of wingtip vortices are usually seen only at low altitude where the aircraft is travelling slowly after takeoff or before landing, and where the ambient humidity is higher; they trail behind the wingtips and wing ...