SHELL AVIATION FUELS
Shell Aviation fuels may be classified into three basic groups : aviation
gasoline, for use in reciprocating or piston engines; aviation turbine fuels
(jet fuels), for use in turbo-fan, turbo-jet and turbo-prop engines and power
boost fluids. The various grades of each type available are described in
All Shell Aviation fuels are produced to stringent manufacturing
specifications. At every stage between refinery and aircraft tank, fuel
quality is checked by sampling and laboratory analysis, to ensure that the
fuel conforms to the requirements specified for the grade when it is
delivered to the aircraft. The Shell Aviation Quality Assurance System is
organised on a worldwide basis, made easier because Shell Aviation
Service is provided directly in many countries of the world; a representation
matched by no other supplier of aviation fuel.
AVIATION TURBINE FUEL (JET FUEL)
Today's kerosine ‘Jet’ fuels have been developed from the illuminating
kerosine used in the early gas turbine engines. These engines needed a
fuel with good combustion characteristics and a high energy content. The
kerosine type fuels used in civil aviation nowadays are mainly Jet A-1 and
Jet A. The latter has a higher freezing point (maximum –40°C instead of
maximum –47°C) and is available only in North America.
MAJOR CIVIL JET FUEL GRADES
Jet A-1 is a kerosine grade of fuel suitable for most turbine engined aircraft.
It has a flash point minimum of 38°C (100°F) and a freeze point maximum
of –47°C. It is widely available outside the U.S.A. The main specifications
for Jet A-1 grade (see below) are the UK specification DEF STAN 91-91 (Jet
A-1) NATO code F-35, (formerly DERD 2494) and the ASTM specification
D 1655 (Jet A-1).
Jet A is a kerosine grade fuel, normally only available in the U.S.A. It has
the same flash point as Jet A-1 but a higher freeze point maximum (–40°C).
It is supplied against the ASTM D 1655 (Jet A) specification. Jet A is used
within the United States by domestic and internati