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  2. Hornblower Hybrid - Wikipedia

    en.wikipedia.org/wiki/Hornblower_Hybrid

    The Alcatraz Clipper Hybrid was originally constructed in the early 1970s as a vessel to serve Catalina Island. Hornblower Cruises subsidiary Alcatraz Cruises acquired the vessel in 2008 and retrofitted it to have Tier II engines with a Selective Catalytic Reduction (SCR) units. In 2011 Alcatraz Cruises implemented Hornblower's Hybrid technology.

  3. Counter-rotating propellers - Wikipedia

    en.wikipedia.org/wiki/Counter-rotating_propellers

    Six engines North American P-82 Twin Mustang: US: 1946: Twin engines North American Rockwell OV-10 Bronco: US: 1969: Twin engines [citation needed] Piaggio P.180 Avanti: Italy: 1986: Twin engines Piper PA-31 Navajo (some variants) US: 1967: Twin engines Piper PA-34 Seneca: US: 1971: Twin engines Piper PA-39 Twin Comanche C/R: US: 1962: Twin ...

  4. Cemre Shipyard - Wikipedia

    en.wikipedia.org/wiki/Cemre_Shipyard

    Wind of Change is equipped with a Heave Compensated Gangway (providing continuous access to the turbines), a 3D Crane, helideck and a side boat landing. Delivered in April 2019, she operates for Ørsted in German waters. [5] She has a DP system and an innovative DC grid developed by ABB. [6] Groenewind is the first DP2, twin-hulled SOV in the ...

  5. Flat-twin engine - Wikipedia

    en.wikipedia.org/wiki/Flat-twin_engine

    The most common type of flat-twin engine is the boxer-twin engine, where both pistons move inwards and outwards at the same time. The flat-twin design was patented by Karl Benz in 1896 and the first production flat-twin engine was used in the Lanchester 8 hp Phaeton car released in 1900. The flat-twin engine was used in several other cars since ...

  6. Rigid inflatable boat - Wikipedia

    en.wikipedia.org/wiki/Rigid_inflatable_boat

    RNLI inshore rescue boat during Falmouth Lifeboat Day, August 2006. A rigid inflatable boat (RIB), also rigid-hull inflatable boat or rigid-hulled inflatable boat (RHIB), is a lightweight but high-performance and high-capacity boat constructed with a rigid hull bottom joined to side-forming air tubes that are inflated with air to a high pressure so as to give the sides resilient rigidity along ...

  7. Straight-twin engine - Wikipedia

    en.wikipedia.org/wiki/Straight-twin_engine

    A straight-twin engine, also known as an inline-twin, vertical-twin, inline-2, or parallel-twin, is a two-cylinder piston engine whose cylinders are arranged in a line along a common crankshaft. Straight-twin engines are primarily used in motorcycles; other uses include automobiles, marine vessels, snowmobiles, jet skis , all-terrain vehicles ...

  8. Engine balance - Wikipedia

    en.wikipedia.org/wiki/Engine_balance

    Engine balance refers to how the inertial forces produced by moving parts in an internal combustion engine or steam engine are neutralised with counterweights and balance shafts, to prevent unpleasant and potentially damaging vibration. The strongest inertial forces occur at crankshaft speed (first-order forces) and balance is mandatory, while ...

  9. Grumman G-21 Goose - Wikipedia

    en.wikipedia.org/wiki/Grumman_G-21_Goose

    The Grumman G-21 Goose is an amphibious flying boat designed by Grumman to serve as an eight-seat "commuter" aircraft for businessmen in the Long Island area. The Goose was Grumman's first monoplane to fly, its first twin-engined aircraft, and its first aircraft to enter commercial airline service.