Specifies a method of designating the cylinders of reciprocating internal combustion engines.
1.1 It does not apply to engines used to propel:
a) aircraft,
b) automobiles and trucks,
c) agricultural and industrial types of tractors,
d) road construction and earth moving machines, and
e) motorcycles.
IS 7451 Pt.5-1974 history
1975IS 7451 Pt.5-1974 Reciprocating Internal Combustion Engine Part V Cylinder Nomenclature