The term “propulsion” means to push forward or drive an object forward. Propulsion systems consist of a source of mechanical power and a propulsor – or means of converting this power into propulsive force. What do you know about the concept?
The fuel does not have to be vaporised
It cannot operate inverted
A throttle butterfly is unnecessary
There is no choke on the intake
The connecting rod assembly
The cam shaft
The tappet assembly
The crankshaft
W
X
Y
Z
Just before TDC on the compression stroke
Just before TDC on the power stroke
At TDC on the power stroke
At TDC on the compression stroke
Olympus 593
Spey
Tyne
Pegasus
Hold the sparking plugs in place
Attach the pistons to their connecting rods
Fasten together the two halves of the crankcase
Retain the valves in their guides
Jet pipe
Turbine
Combustion chamber
Compressor
To direct air through the engine compartment
To reduce the weight of the engine
To support the engine cowlings
To allow heat to dissipate rapidly
Fine pitch
Take-off pitch
Optimum pitch
Coarse pitch
Maintain a selected engine speed within the power available
Feather the propeller
Retard the ignition timing
Increase the mixture strength
Promotes longer life between engine overhauls
Much cheaper to make
Can hold the engine at a more even temperature
Engine can be more easily streamlined
Windmilling
Propeller braking
Reverse thrust
Contra rotating
High voltage electrical impulses to the cylinders
Oil to all parts of the engine
The correct mixture of air and fuel to the cylinders
Cooling air to all parts
Make feathering possible
Make the blade stronger and lighter
Reduce noise levels
Even out the thrust along the length of the blade
Its leading edges are facing forwards in the direction of flight
It is operating at its maximum rotational speed
Its leading edges are facing 90O to the direction of flight
It is producing maximum power
To scavenge containments from the oil
To transfer oil from the crankcase to the oil tank
To direct oil into the pressure chamber
To ensure that all engine components are lubricated
A steady operating temperature will be more easily maintained
The engine will be lighter
The engine will be simpler
The engine will be less costly to produce
A secondary compass system
A dynamo to produce the spark for the spark plugs
A mechanical pump for circulating
An instrument for metering fuel flow
Low-speed fixed-wing aircraft
Helicopters
High altitude reconnaissance aircraft
High-speed combat aircraft
Gravity
Coil springs
Cams pressing on the valve stems
Atmospheric pressure
Fitted to turbo-fans only
Driven by exhaust gases
Driven by gears from the engine
Fitted to turbojet engines only
Adour
Dart
RB 211
Spey
Inlet valve closing after the piston has passed BDC
Inlet and exhaust valves are open together
Exhaust valves clsoing after the piston has passed TDC
Exhaust valve opening before the piston reaches BDC
Vapourise the fuel as much as possible
Drive the gas stream into the atmosphere
Energise the gas steam
Drive the compressor