B727-200 Autopilot

[Vc10Tail]

Any old timers in here can shed the differences between the Sperry SP-50/and SP-100 or SP-150 of this old bird and its individual quirks ) like failure tp capture altitude and causes of AP trip offs, etc)?

How did it behave in severe weather, Icing,Lightning strikes?

How reliable was it with degraded hydraulic power and how it handled one eng out auto coupled approaches?

Thanks