AMC 25.143(h) Manoeuvre Capability
ED
Decision 2007/010/R
1 As an alternative to a detailed
quantitative demonstration and analysis of coordinated turn capabilities, the
levels of manoeuvrability free of stall warning required by CS 25.143(h) can normally be assumed where the scheduled operating speeds are
not less than –
1.08 VSW
for V2
1.16 VSW
for V2 + xx, VFTO and VREF
where VSW
is the stall warning speed determined at idle power and at 1g in the same
conditions of configuration, weight and centre of gravity, all expressed in
CAS. Neverthless, a limited number of turning flight manoeuvres should be
conducted to confirm qualitatively that the aeroplane does meet the manoeuvre
bank angle objectives (e.g. for an aeroplane with a significant Mach effect on
the CL/α relationship) and does not exhibit other characteristics
which might interfere with normal manoeuvring.
2 The effect of thrust or power is
normally a function of thrust to weight ratio alone and, therefore, it is
acceptable for flight test purposes to use the thrust or power setting that is
consistent with a WAT-limited climb gradient at the test conditions of weight,
altitude and temperature. However, if the manoeuvre margin to stall warning
(or other relevant characteristic that might interfere with normal
manoeuvring) is reduced with increasing thrust or power, the critical
conditions of both thrust or power and thrust-to-weight ratio must be taken
into account when demonstrating the required manoeuvring capabilities.
[Amdt
25/3]