My father tells me that the Piasecki HUP-2 had SAS long before his squadron got the HSS (H-34).
Pprune Fan #1 gets my vote. The 'Piasaki' Banana had the first real SAS system in heli's. Lu Zukerman: You are correct, the SCAS on the AH-64 is different than SAS. The wind excursions, yaw excursions etc are effected differently, and not just from gyro inputs. A distinguishment of modern SAS can be found on the level of Airspeed Data inputs and sensitivity. B430 has A/S data input. B222 does not have effective input below approx 60KIAS. If you have total SAS failure, regardless of Heli type, shake the stick in very small movements in the effected axis...and nobody in the back will notice!!!!!