“…Whereas the present paper follows the classical formulation of the LFCM (as in [19,13,11]), the work in [21] proposes a different manipulation of the LFCM and the eigenvalue analysis is limited to OIS determination rather than full modal analysis and Campbell diagrams. In addition to Case A1, applicability to Case A2 is illustrated in [21] using a similar bilinear foil model, but the results for this case are not verified against Jacobian-based linearisation or TNDA of the fully-coupled system. Hence, the LFCM's inability to detect pad flutter instability of SEC II of Case (Figure 6b) is not reported in [21].…”