Fuel & Hydraulic Pressure
Fuel Pressure Fuel pressure gauges also provide critical information to the pilot. Typically, fuel is pumped out of various fuel tanks on the aircraft for use by the engines. A…
Engine Pressure Ratio (EPR)
Turbine engines have their own pressure indication that relates the power being developed by the engine. It is called the engine pressure ratio (EPR) indicator (EPR gauge). This gauge compares…
Manifold Pressure
In reciprocating engine aircraft, the manifold pressure gauge indicates the pressure of the air in the engine’s induction manifold. This is an indication of power being developed by the engine.…
Pressure Instruments
Engine Oil Pressure The most important instrument used by the pilot to perceive the health of an engine is the engine oil pressure gauge.Oil pressure is usually indicated in psi.…
Types of Pressure
Pressure is a comparison between two forces. Absolute pressure exists when a force is compared to a total vacuum, or absolutely no pressure. It is necessary to define absolute pressure,…
Pressure Measuring Instruments
A number of instruments inform the pilot of the aircraft’s condition and flight situations through the measurement of pressure. Pressure-sensing instruments can be found in the flight group and the…
Navigation Instruments
Navigation instruments are those that contribute information used by the pilot to guide the aircraft along a definite course. This group includes compasses of various kinds, some of which incorporate…
Classifying Instruments
There are three basic kinds of instruments classified by the job they perform: flight instruments, engine instruments, and navigation instruments. There are also miscellaneous gauges and indicators that provide information…
Reducing Skin-Friction Drag by Laminar Flow
In a previous post I introduced the concept of skin-friction and pressure drag, and discussed the contradicting aerodynamic conditions to minimise either of the two types of drag. Overall the minimum…
Thrust Reversal
In a typical turbofan jet engine the oncoming airflow is compressed throughout a series of compressor stages, mixed with a fuel (typically kerosene) and combusted, drastically increasing pressure and temperature,…
