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2. Servo (radio control) - Wikipedia

   en.wikipedia.org/wiki/Servo_(radio_control)

   The earliest form of sequential (although not proportional) actuator for radio control was the escapement. [3] Like the device used in clocks, this escapement controls the release of stored energy from a spring or rubber band. Each signal from the transmitter operates a small solenoid that then allows a two- or four-lobed pawl to rotate.

3. Category:Sailboat components - Wikipedia

   en.wikipedia.org/wiki/Category:Sailboat_components

   Pages in category "Sailboat components" The following 59 pages are in this category, out of 59 total. This list may not reflect recent changes. *

4. Fairlead - Wikipedia

   en.wikipedia.org/wiki/Fairlead

   Adjustable fairlead (lower right) leading to winch on sailboat Fairlead (Chock style) Three mooring lines running through fairlead on a Royal New Zealand Navy ship.. A fairlead is a turning point for running rigging like rope, chain, wire or line, that guides that line such that the "lead" is "fair", and therefore low friction and low chafe. [1]

5. Boom vang - Wikipedia

   en.wikipedia.org/wiki/Boom_vang

   Hydraulic piston vangs are used on larger sailboats and controlled by manual or electric hydraulic pumps. [2] By controlling leech tension, the boom vang is one way of controlling sail twist. [3] The boom vang may also be used to flatten the mainsail on dinghies. [4] On small sailboats and some cruising sailboats a vang may be omitted.

6. Grinder (sailing position) - Wikipedia

   en.wikipedia.org/wiki/Grinder_(sailing_position)

   Winch. A grinder is a crew member on a yacht whose duties include operating manual winches (called "coffee grinders") that raise and trim the sails and move the boom. [1] It is a physically demanding role with a significant impact on a racing yacht's overall performance.

7. Radio-controlled boat - Wikipedia

   en.wikipedia.org/wiki/Radio-controlled_boat

   A mass-produced radio-controlled yacht In 1898, Tesla demonstrated a radio-controlled boat (U.S. patent 613,809 —Method of an Apparatus for Controlling Mechanism of Moving Vehicle or Vehicles). A radio-controlled boat is a boat or ship model controlled remotely with radio control equipment.