propeller-head - definizione. Che cos'è propeller-head
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Cosa (chi) è propeller-head - definizione

AIRCRAFT COMPONENT WHICH CONVERTS ENGINE TORQUE INTO FORWARD THRUST
PropHead; Propellor head; Airscrew; Aircraft propeller; Aircraft Propeller; Air screw; Air propeller; Feathering (propeller); Aerial propeller; Propeller (aircraft); Aircraft propellers; Reverse pitch; Twin prop
  • TP400]] turboprop of an [[Airbus A400M]]
  • Changes in propeller blade angle from hub to tip.
  • Counter-rotating propellers
  • [[Leonardo's aerial screw]]
  • Prototype created by [[Mikhail Lomonosov]], 1754
  • A 6-bladed [[Hamilton Standard]] 568F propeller on an [[ATR 72]] short-haul airliner
  • Cut-away view of a [[Hamilton Standard]] propeller. This type of constant-speed propeller was used on many American fighters, bombers and transport aircraft of [[World War II]]
  • A decorated Japanese ''taketombo'' [[bamboo-copter]]
  • A sailor checks the propeller of a [[Landing Craft Air Cushion]] hovercraft

propeller-head      
¦ noun informal a person obsessed with computers or technology.
Origin
1980s: prob. with ref. to a beanie hat with a propeller on top, popularized by science-fiction enthusiasts.
airscrew         
¦ noun Brit. an aircraft propeller.
propeller head         
WIKIMEDIA DISAMBIGUATION PAGE
<jargon> Used by hackers, this is synonym with {computer geek}. Non-hackers sometimes use it to describe all techies. Probably derives from SF fandom's tradition (originally invented by old-time fan Ray Faraday Nelson) of propeller beanies as fannish insignia (though nobody actually wears them except as a joke). [Jargon File] (1995-01-18)

Wikipedia

Propeller (aeronautics)

An aircraft propeller, also called an airscrew, converts rotary motion from an engine or other power source into a swirling slipstream which pushes the propeller forwards or backwards. It comprises a rotating power-driven hub, to which are attached several radial airfoil-section blades such that the whole assembly rotates about a longitudinal axis. The blade pitch may be fixed, manually variable to a few set positions, or of the automatically variable "constant-speed" type.

The propeller attaches to the power source's driveshaft either directly or through reduction gearing. Propellers can be made from wood, metal or composite materials.

Propellers are most suitable for use at subsonic airspeeds generally below about 480 mph (770 km/h), although supersonic speeds were achieved in the McDonnell XF-88B experimental propeller-equipped aircraft. Supersonic tip-speeds are used in some aircraft like the Tupolev Tu-95, which can reach 575 mph (925 km/h).