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Pressure instruments are widely used in aviation. This article introduces the basic components of pressure as relevant to gliding. We shall then discuss how the pressure varies in the atmosphere, and the implications of this on the functioning of pressure instruments.
The author finds it very hard to discuss such topics without the aid of mathematical formulae. Every effort shall be made to explain the physical background of all the definitions and theorems used. If there is something you cannot understand, please consult an instructor who may determine what level of mathematical understanding (if any) is necessary. You do not need to be a physicist or engineer to fly gliders.
== Fundamental Thermodynamics ==
== Pressure ==
=== Definitions ===
==== Static pressure ====
==== Dynamic pressure ====
==== Total pressure ====
=== How to measure pressure ===
=== Pressure coefficient ===
== Atmosphere ==
=== Simplified model ===
=== Compressible effects ===
=== The International Standard Atmosphere ===
== Instrumentation ==
=== Air speed indicator ===
==== Function ====
==== Errors: TAS & IAS ====
==== Stall speed and \(V_{NE}\) ====
=== Altimeter ===
==== Function ====
==== Setting ====
=== Vertical speed indicator (power) ===
=== Total energy in gliding: a more interesting quantity ===
==== How to measure total energy ====
=== Variometer (gliders) ===
The author finds it very hard to discuss such topics without the aid of mathematical formulae. Every effort shall be made to explain the physical background of all the definitions and theorems used. If there is something you cannot understand, please consult an instructor who may determine what level of mathematical understanding (if any) is necessary. You do not need to be a physicist or engineer to fly gliders.
== Fundamental Thermodynamics ==
== Pressure ==
=== Definitions ===
==== Static pressure ====
==== Dynamic pressure ====
==== Total pressure ====
=== How to measure pressure ===
=== Pressure coefficient ===
== Atmosphere ==
=== Simplified model ===
=== Compressible effects ===
=== The International Standard Atmosphere ===
== Instrumentation ==
=== Air speed indicator ===
==== Function ====
==== Errors: TAS & IAS ====
==== Stall speed and \(V_{NE}\) ====
=== Altimeter ===
==== Function ====
==== Setting ====
=== Vertical speed indicator (power) ===
=== Total energy in gliding: a more interesting quantity ===
==== How to measure total energy ====
=== Variometer (gliders) ===