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The Blackburn B-20 was an experimental aircraft, first flying in 1940, that attempted to drastically increase the performance of flying boat designs. Blackburn Aircraft undertook an independent design study based on a patent filed by their chief designer, John Douglas Rennie [1] for a retractable pontoon float that formed the planing hull.
Tigerfish Aviation is an aerospace research and development company based in Norwood, South Australia. [1] The company has been developing a retractable pontoon system for the float plane industry, which has been patented as Retractable Amphibious Pontoon Technology or RAPT since the late 1990s.
A pontoon bridge is a collection of specialized, shallow draft boats or floats, connected together to cross a river or canal, with a track or deck attached on top. The water buoyancy supports the boats, limiting the maximum load to the total and point buoyancy of the pontoons or boats. [ 2 ]
It is a special kind of floating retractable bridge, used at the Great North Holland Canal, which pivot either centrally or from one or both banks of a body of water to allow vessels to pass through. In the Dutch province of North Holland , a vlotbrug is a retractable pontoon bridge which opens for water traffic by retracting in its long ...
A Braby pontoon constructed at Evans Bay in Wellington, New Zealand in 1951 consisted of 124 large square steel tanks connected together and ballasted with water and oil. [9] The pontoon was U-shaped, 110 feet (34 m) long and 74 feet (23 m) wide. Flying boats were winched tail-first into the U so that passengers could step onto the pontoon dock ...
A retractable bridge is a type of moveable bridge in which the deck can be rolled or slid backwards to open a gap while traffic crosses, usually a ship on a waterway. This type is sometimes referred to as a thrust bridge. The bridge is retracted to the right. Borden Avenue Bridge, Long Island City. Retractable bridges date back to medieval times.