H225 AFCS actuators, explained.

Interactive drawings built from the EC225 LP T1 training manual, chapter 27 Autoflight – Actuators detailed functioning. Each one redraws the manual figure to scale and lets you move the mechanism through the cases described in the text.

AP hydraulic unit – series actuators

Servo-valve, distributor in its stirrup, power actuator and by-pass actuator. Without and with hydraulic assistance, and the five steps of an AFCS order.

Manual 1.10.1 to 1.10.5, pages 27-40 to 27-57 Open

Trim / force feel actuators – parallel actuators

Force law spring and switches, RVDTs, DC motor with wormscrew reducer, clutch, damper and reduction gear. Force feel, trim release, beep and auto trim, shear pin.

Manual 1.10.6 and 1.10.7, pages 27-58 to 27-61 Open

For instruction only. Drawings redrawn from the Airbus EC225 LP training manual for teaching purposes.