Pitch instability + tracks

[vctpil]

Hi,

F15E clean with A/P ALT HOLD mode : stable flight when reducing speed (Test Pitch stable.trk).

F-15E + TPOD + NAVFLIR with A/P hold mode : slightly unstable when reducing speed trhough 250 knots (Test Pitch Unstable.trk).

In manual flight, the effect is more pronounced. Trimming seems having no effect initially.

Thanks,

Vincent

Test Pitch Stable.trk Test Pitch Unstable.trk