1.1.1 The
systems are to be free from excessive torsional, axial, lateral and
linear vibration, and are to be aligned in accordance with accepted
tolerances and taking into account the requirements of Pt 5, Ch 8, 5.5 Measurements.
1.1.2 System
designs are to take account of the potential effects of engine and
component malfunction and variability in characteristic values such
as stiffness and damping of flexible couplings and dampers or engine
misfire conditions.
1.1.3 Where
torques, stresses or amplitudes are found to exceed the limits for
continuous operation, restrictions in speed and/or power will be imposed.
1.1.4 Where
significant changes are subsequently made to a dynamic system which
has been approved, (e.g. by changing the original design parameters
of the prime movers and/or propulsion shafting system, or by fitting
a propeller or flexible coupling of different design from the previous),
revised calculations may require to be submitted for consideration.
Details of all such changes are to be submitted.