2016年7月11日 · The indicator above is showing a true airspeed of about 202 MPH, at a pressure altitude of 10,000 feet and a temperature of -15 degrees. For a nice video tutorial check out this one from the University of Oklahoma .

2020年2月6日 · The FAA has a nice introduction document on flight instruments, which explains all the standard markings on a typical airspeed indicator (ASI): As shown in [the figure above], ASIs on single-engine small aircraft include the following standard color-coded markings:

2017年12月3日 · There is a single exception to this, as far as I know, which is the VNE: since the maximum speed is determined not by direct flying characteristics of the wing but by stress and vibration, it depends on true airspeed and not on the indicated one; so, at height, the pilot needs to be aware that the VNE shown in the airspeed indicator is not the ...

2018年11月24日 · The airspeed indicator is basically an instrument that provides the pilot with the difference between static and dynamic pressure, reported in a scale calibrated in a unit of speed (usually knots, which is nautical miles per hour; sometimes km/h or mi/h).

2019年7月1日 · The Indicated Airspeed (IAS) is measured based on the difference between the static air pressure (measured via the static port) and the ram air pressure (measured via the pitot tube). A typical GA airspeed indicator looks like this: (source: Wikimedia) The difference in the pressures causes the diaphragm to flex.

2018年3月29日 · The Airspeed Indicator displays airspeed on a rolling number gauge using a moving tape. The numeric labels and major tick marks on the moving tape are marked at intervals of 10 knots. Speed indication starts at 30 knots, with 60 knots of airspeed viewable at any time. The actual airspeed is displayed inside the black pointer.

2020年12月30日 · Traditional A/S indicators are covered by TSO-C2d which references Society of Automotive Engineers, Inc., (SAE) Aerospace Standard (AS) 8019, "Airspeed Instruments", dated March 30, 1981. Air data computers are covered by TSO-C106 which references SAE AS 8002, “Air Data Computer - Minimum Performance Standard,” dated October 30, 1981.

2014年5月29日 · The airspeed indicator, on the other hand, is really just a "dynamic pressure" sensor. It works by measuring the pressure of the ram airflow. But as we know, as you climb up into the atmosphere, the air gets thinner - less dense, and lower pressure. This makes the airspeer indicator read lower than true airspeed.

2017年7月5日 · However, airspeed indicator does not indicate true airspeed and this is intentional. The EAS, that the airspeed indicator is aiming to show, is a measure of dynamic pressure. Since lift, which also includes effectiveness of control surfaces, is proportional to dynamic pressure and drag is also a function of dynamic pressure, most handling ...

2017年1月21日 · Some aircraft have angle of attack indicator, but most don't even though they have the sensor and use it for stall warning. What you normally have is an unreliable airspeed procedure . This generally says that you should, depending on phase of flight, maintain specific pitch, set specified thrust and then adjust for rate of climb/descent while ...