Aircraft Propulsion Systems

In propulsion by action, a great ______ of air is expelled rearwards with a low increase of speed.

In propulsion by reaction, the forward force is produced by expelling a ______ of gas with a certain speed.

The principle of operation of a jet engine is similar to a ______ engine in that the processes such as induction, compression, ignition and exhaust are the same.

The ambient air enters the engine through the ______ intake.

The air is then compressed by a multi- stage axial ______.

The combustion is achieved in an ______ chamber.

Gas turbine engines are divided into two main classes: ______ jet engine and Turbo prop engine.

The forward force 'F' is given by 'F' = m (V2- ______).

The primary aircraft controls are arranged as follows: a control ______ governs the aircraft's roll and pitch.

The ______ pedals, to control yaw, which move the rudder.

The throttle controls are used to control engine ______ or thrust for powered aircraft.

The trim tabs are small control surfaces connected to the trailing edge of a larger control surface of ______.

Trim tabs are used to control the ______ of the controls, i.e. to counteract aerodynamic forces and stabilise the aircraft in a particular desired attitude.

Air brakes or speed brakes are a type of flight control surface used on an aircraft to increase ______ or increase the angle of approach during landing.

Spoilers are designed to increase ______ while making little change to lift.

Spoilers reduce the ______-to-drag ratio and require a higher angle of attack to maintain lift, resulting in a higher stall speed.

The fuselage is the main body of the ______ to which all the other components are attached.

Early aircraft were constructed of ______ frames covered in fabric.

As monoplanes became popular, ______ frames improved the strength.

Some modern aircraft are constructed with ______ materials for major control surfaces.

The Boeing 787 makes possible higher ______ levels and larger windows for passenger comfort.

The cockpit is where the pilot controls the ______.

A wing is a type of ______ with a surface that produces lift for flight or propulsion.

Wings have an ______ shape, a streamlined cross-sectional shape producing a useful lift to drag ratio.

During such occasions, the instruments of an aircraft play a very vital role in aiding the pilot to fly the aircraft ______.

The ______ indicator is an instrument used in an aircraft to display the craft's airspeed to the pilot.

The static pressure is due to the pressure exerted by the ______ and the dynamic is due to the movement of the tube through the air.

The dynamic pressure is calculated as: Dynamic = ______ – Static.

The ______ pressure remaining constant in the entire case, the variation is only in the pitot pressure due to the movement of the aircraft in air.

An ______ is an instrument used to measure the altitude of an object above a fixed level usually the sea level.

The atmosphere has weight and this weight exerts ______.

Altitude can be determined based on the measurement of ______ pressure.

The radar signals that are reflected back towards the transmitter are the desirable ones that make radar ______.

In aviation, aircraft are equipped with radar devices that warn of obstacles in or approaching their ______ and give accurate altitude readings.

Primary radar uses the principle of ______ technique to determine range and bearing of an object.

In secondary radar, active cooperation of the other ______ is required.

In continuous wave radar, both the transmission and the reception take place ______.

Understanding the basic functions of Radar would help cadets in better assimilation of facilities available in the ______ and their role in promoting safe flying.