: A highly popular two-axis autopilot system utilizing the KC 295 Flight Computer.
For official technical data, refer to the following BendixKing and third-party technical archives: Downloads & Manuals - BendixKing
Understanding the physical and electrical requirements is the first step in a successful installation: ki 256 installation manual
The KI 256 is a 3-inch (ATI) panel-mounted electrically driven attitude gyro with built-in Flight Director command bars. It receives pitch and roll steering commands from an external Flight Director computer (e.g., KFC 150/200/250 series). The instrument requires both (or optional 14 VDC with converter) and a regulated vacuum source for gyro spin-up and rigidity.
Technicians must perform a complete functional test as outlined in Section VI of the KI 256 Maintenance Manual to ensure the indicator responds correctly to pitch and roll inputs. : A highly popular two-axis autopilot system utilizing
Start the aircraft engine or connect an external vacuum source. Verify the vacuum gauge reads between 4.5 and 5.2 in. Hg.
The following steps provide a detailed guide on the installation of the KI 256: The instrument requires both (or optional 14 VDC
Insert the KI 256 from behind the panel and secure it using standard 6-32 brass or non-magnetic screws to prevent interference with nearby magnetic compasses. 3. Electrical Wiring and Pinout Configuration
The KI 256 is known for needing periodic overhaul due to bearing wear.