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2. Sail switch - Wikipedia

   en.wikipedia.org/wiki/Sail_switch

   A sail switch, vane switch or flow switch is a mechanical switch that is actuated on or off in response to the flow or non-flow of a fluid such as air or water. [1] A sail switch typically operates through the use of a paddle or a diaphragm which gets displaced due to the force of fluid or air moving past it.

3. List of extant paddle steamers - Wikipedia

   en.wikipedia.org/wiki/List_of_extant_paddle_steamers

   A few paddle steamers serve niche tourism needs as cruise boats on lakes [a] and others, such as Delta Queen, still operate on the Mississippi River. In Oregon , several replica paddle steamers , which are non-steam-powered sternwheelers built in the 1980s and later, are operated for tourism purposes on the Columbia and Willamette Rivers .

4. Director-class tugboat - Wikipedia

   en.wikipedia.org/wiki/Director-class_tugboat

   The Director class was a class of diesel-electric paddle tugboats ordered by the British Admiralty's Royal Maritime Auxiliary Service and constructed in 1957–1958. [3] [2] Each paddle wheel was driven by an individual electric motor, giving outstanding manoeuvrability. Paddle tugs were able to more easily make use of the inherent advantage of ...

5. Marine propulsion - Wikipedia

   en.wikipedia.org/wiki/Marine_propulsion

   Rotation of the paddle wheel produces thrust, forward or backward as required. More advanced paddle wheel designs have featured feathering methods that keep each paddle blade oriented closer to vertical while it is in the water; this increases efficiency. The upper part of a paddle wheel is normally enclosed in a paddle box to minimize splashing.

6. List of How It's Made episodes - Wikipedia

   en.wikipedia.org/wiki/List_of_How_It's_Made_episodes

   Paddle boats: Fibre cement siding: November 2, 2011 ... Electrical switches: Thai fish sauce: Capers: July 18, 2016 ... Electric boats: Fencing foils: Specials

7. Dead man's switch - Wikipedia

   en.wikipedia.org/wiki/Dead_man's_switch

   Interest in dead man's controls increased with the introduction of electric trams (streetcars in North America) and especially electrified rapid transit trains. The first widespread use came with the introduction of the mass-produced Birney One-Man Safety (tram) Car, though dead-man equipment was fairly rare on US streetcars until the successful PCC streetcar, which had a left-foot-operated ...