Drift meter

Drift meter

A drift meter, also drift indicator and drift sight, is an optical device used to improve dead reckoning for aircraft navigation. It consists of a small telescope extended vertically through the bottom of the aircraft with the eyepiece inside the fuselage at the navigator's station. A reticle, normally consisting of spaced parallel lines, is rotated until objects on the ground are seen to be moving parallel to the lines. The angle of the reticle then indicates the aircraft's drift angle due to winds aloft, and can be used to calculate the ground speed.

References


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • drift meter — noun see drift indicator * * * drift meter, an instrument for measuring the drift of aircraft; drift indicator …   Useful english dictionary

  • Ion drift meter — An ion drift meter is a device used to measure the velocity of individual ions in the area of a spacecraft. This information can then be used to calculate the ion drift in the space surrounding the instrument as well as the strength of any… …   Wikipedia

  • drift indicator — noun or drift meter or drift sight : a flight instrument used for measuring the angle of drift of an aircraft and equipped with a hairline or sight wire that may be rotated until objects on the ground appear to travel parallel with it so that… …   Useful english dictionary

  • Drift Sight — This article is about the World War I bombsight. For the aircraft instrument for measuring wind speeds, see drift meter. A Mk. I Drift Sight mounted on the side of an Airco DH.4. The lever just in front of the bomb aimer s fingertips sets the… …   Wikipedia

  • drift indicator — An instrument that looks vertically at the surface to provide an indication of drift angle. It consists essentially of a sight tube with a hairline that is rotated until objects on the ground travel parallel to it. This direction is compared with …   Aviation dictionary

  • drift indicator — Aeron. an instrument that indicates the amount of drift of an aircraft. Also called drift meter, drift sight. [1915 20] * * * …   Universalium

  • Rorke’s Drift — Rorke’s Drift …   Deutsch Wikipedia

  • Electricity meter — Typical North American domestic analog electricity meter …   Wikipedia

  • Optical power meter — in use An optical power meter (OPM) is a device used to measure the power in an optical signal. The term usually refers to a device for testing average power in fiber optic systems. Other general purpose light power measuring devices are usually… …   Wikipedia

  • Magnetic flow meter — The third most common flowmeter behind differential pressure and positive displacement flow meters, is the magnetic flow meter, also technically an electromagnetic flow meter or more commonly just called a mag meter. A magnetic field is applied… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”