An airspeed indicator is an aviation instrument which displays an aircraft's current airspeed.
A PITO tube is used to measure airspeed of the plane. The covers are put over the tubes when the aircraft is going to be on the ground for an extended period of time, and are removed before takeoff. They are there to prevent tube blockages, leading to airspeed failure, which (and it has happened) could mean a possible accident.
ferroin indicator
The oil level indicator in a transformer is used to show the oil level.
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Sec. 91.117 - Aircraft speed.(a) Unless otherwise authorized by the Administrator, no person may operate an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250 knots (288 m.p.h.).(b) Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500 feet above the surface within 4 nautical miles of the primary airport of a Class C or Class D airspace area at an indicated airspeed of more than 200 knots (230 mph.). This paragraph (b) does not apply to any operations within a Class B airspace area. Such operations shall comply with paragraph (a) of this section.
The airspeed indicator or airspeed gauge is an instrument used in an aircraft to display the airspeed in knots
It's an airspeed indicator that compensates for outside temperature and barometric pressure at altitude.
the airspeed indicator works by measuring the increase in air pressure caused by the moving aircraft
the airspeed indicator works by measuring the increase in air pressure caused by the moving aircraft
Alexander Ogilvie from England
Airspeed Indicator.
some V speeds are not indicated, It doesn't show true airspeed or ground speed.
Airspeed indicator, alitimeter, and vertical speed indicator.
airspeed indicator
Airspeed indicator.
Airspeed indicator
it works with the difference between pitot pressure and static pressure