Aircraft fuel system.pptx manhar singh

MANHAR
M.TECH(1ST YEAR)
15AE60R18

Reciprocating engine fuels
Turbine engine fuels
• Jet A- Which is Kerosene
• Jet B- A blend of kerosene & gasoline
• Jet A-1- used for operation at extremely
low Temperature

Water contamination in fuel can be in two
form
Dissolve in the fuel
Entrained or suspended
Water in fuel can cause icing in the aircraft
fuel system usesally in
•Boost Pump Screens
•Low pressure filters

The purpose of an aircraft fuel system is to
store and deliver the proper amount of clean
fuel at the correct pressure to the engine
Fuel system should provide positive &
reliable fuel flow through all phases of flight
including
Change in altitudes
Violent maneuvers
Sudden acceletration & deceleration

Fuel system should also continous monitor
system opration such as
Fuel pressure
Fuel flow
warning singnal
Tank quantity

Fuel system can be classified in two broad
categories
Gravity feed csystem
Pressure feed system

Pump
Tanks
Lines valves
Fuel flow meters
Filters & stainer
Quantity indicator
Warning components
Fuel drains
heaters

Fuel pumps are used to move fuel through
the system than gravity feed is insufficiet.
There are three main funtions of fuel pumps
they are to move fuel.
The tank to the engine
One tank to another
The engine back to the tank

Engine fuel system require main pumps and in
some system emergincy pumps
There requiremant depends on the type of
engine installed on the aircraft

Reciprocating engines which are not gravity
fed require
At least one main pump for each engine
There pumps must be engine driven
The pump capacity must capable of providing
enough fuel flow for all aperation

Turbine engine requirement
 At least one main pump for each engine
 Main pump power supply must be indepndent of all
other main pump power supplies
 Each positive aisplacement main pump must be able
to be bypassed

One way to classify fuel pumps is according to
the pumps funtion.
There classification are
Boost pump
Scavenge pump
Cross-feed pump
Another way to classify fuel pump is by then
methods of operation
Those pump are.
 Vane-type
 Variable- volume
 Centrifugal
 Ejector

Fuel system on different aircraft may use
several types of fuel tanks
The Three basic types of fuel tanks used on
aircraft are.

Intergral fuel tanks are commonly located in the
aircraft wing or fuselage
There tanks are ones that are built into structure of
the aircraft &generally can’t be removed
Integral fuel tanks are formed by the actual structure
of the aircraft
This type ao tanks is used in some light hight-
performance aircraft

Rigid removable fuel tanks are often made
of aluminium component that are welded
together
There tanks are in installed in compartment
specifically made for the tanks
The tank may be held in place with padded
straps
This types of tank is often found on more
expensive light aircraft

Bladder type fuel tank are bassically a
reinforced rebberized bag
There tank are installsd in compartment which
support thw weight of the fuel
These tank id held in palce with bottom & slides
og the tank
This type of tank is usually found on light
aircraft

Fuel lines on aircraft are either made of rigid
metal tubing or flexible hose
Most of the fuel line are the regid type which
are usually made of aluminium alloy
The flexible hose fuel lines are either made of
synthetic rubber or tefton
The diameter of tubing used is decided by the
engine fuel requirement

Fuel selector valves sre used in aircraft aff
system to
Shot off fuel flow
Cross –feed
Transfer- fuel
Selector valves may be operated manually or
electrically depending on the installation

Fuel is usually strained at the point in the
system

Mechanical
Inverted float gauge

Some aurcraft fuel system allow for fuel

Aircraft fuel system.pptx manhar singh

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