rocket projector - translation to german
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rocket projector - translation to german

IMAGE PROJECTOR IN A HANDHELD DEVICE
Micro Projector; Pocket projector; Microprojector; Pico projector; Picoprojector; Pico-projector; Pico Projector; Handheld projectors
  • 3M pocket projector
  • Handheld
  • The [[Nikon Coolpix S1000pj]] compact camera projecting an image using its built-in projector.

rocket projector      
Raketenabschuß
rocket motor         
  • Armadillo Aerospace's quad vehicle]] showing visible banding (shock diamonds) in the exhaust jet
  • Exhaust exits nozzle
}}
  • Opel RAK.1 - World's first public flight of a manned  rocket-powered plane on September 30, 1929
  • The four expansion regimes of a de Laval nozzle:
• under-expanded
• perfectly expanded
• over-expanded
• grossly over-expanded
  • Rocket vehicle mechanical efficiency as a function of vehicle instantaneous speed divided by effective exhaust speed. These percentages need to be multiplied by internal engine efficiency to get overall efficiency.
  • Rocket thrust is caused by pressures acting in the combustion chamber and nozzle. From Newton's third law, equal and opposite pressures act on the exhaust, and this accelerates it to high speeds.
  • Exhaust exits nozzle
}}
  • Viking 5C rocket engine]] used on [[Ariane 1]] through [[Ariane 4]]
NON-AIR BREATHING JET ENGINE USED TO PROPEL A MISSILE OR VEHICLE
Chemical rocket; Rocket motor; Rocket engines; Rocket engine cooling; Vacuum Isp; Hydrogen reactor; Rocket Engines; Rocket Dynamics; Rocket Engine; Throttleable rocket engine; Rocket engine throttling; Rocket engine restart; History of rocket engines; Rocket ignition; Rocket engine transients; Rocket engine ignition; Rocket-engine; Rapid Unscheduled Disassembly
Raketenmotor
thrust chamber         
  • Figure 1: A de Laval nozzle, showing approximate flow velocity increasing from green to red in the direction of flow
  • RSA-3]] rocket
  • Diagram of a de Laval nozzle, showing flow velocity (v) increasing in the direction of flow, with decreases in temperature (t) and pressure (p). The Mach number (M) increases from subsonic, to sonic at the throat, to supersonic.
  •  grossly overexpanded.
 }}
If a nozzle is under- or overexpanded, then loss of efficiency occurs relative to an ideal nozzle.

Grossly overexpanded nozzles have improved efficiency relative to an underexpanded nozzle (though are still less efficient than a nozzle with the ideal expansion ratio), however the exhaust jet is unstable.<ref name="NASA"/>
TYPE OF PROPELLING NOZZLE
Rocket engine nozzles; Rocket nozzle; Rocket engine expansion; Thrust chamber
Brennkammer, Antriebskammer (bei Raketen)

Definition

Projector
·noun One who projects a scheme or design; hence, one who forms fanciful or chimerical schemes.
II. Projector ·add. ·noun An optical instrument for projecting a picture upon a screen, as by a magic lantern or by an instrument for projecting (by reflection instead of transmission of light) a picture of an opaque object, as photographs, picture post-cards, insects, ·etc., in the colors of the object itself. In this latter form the projection is accomplished by means of a combination of lenses with a prism and a mirror or reflector. Specific instruments have been called by different names, such as radiopticon, mirrorscope, balopticon, ·etc.

Wikipedia

Handheld projector

A handheld projector (also known as a pocket projector, mobile projector, pico projector or mini beamer) is an image projector in a handheld device. It was developed as a computer display device for compact portable devices such as mobile phones, personal digital assistants, and digital cameras, which have sufficient storage capacity to handle presentation materials but are too small to accommodate a display screen that an audience can see easily. Handheld projectors involve miniaturized hardware, and software that can project digital images onto a nearby viewing surface.

The system comprises five main parts: the battery, the electronics, the laser or LED light sources, the combiner optic, and in some cases, scanning micromirror devices. First, the electronics system turns the image into an electronic signal. Next, the electronic signals drive laser or LED light sources with different colors and intensities down different paths. In the combiner optic, the different light paths are combined into one path, defining a palette of colors. An important design characteristic of a handheld projector is the ability to project a clear image on various viewing surfaces.