It fits into a standard 3-inch instrument hole.
| Pin | Signal Name | Description | | :--- | :--- | :--- | | 1 | +28V DC (or +14V DC) | Power for the flight director command bar (and possibly pick‑off excitation) | | 2 | Ground (DC return) | Return for the power supply | | 3 | Pitch command input (+) | Flight director pitch steering signal from autopilot computer | | 4 | Pitch command input (−) | Return for pitch command | | 5 | Roll command input (+) | Flight director roll steering signal from autopilot computer | | 6 | Roll command input (−) | Return for roll command | | 7 | Pitch pick‑off output (sine) | AC signal proportional to pitch attitude → to autopilot computer | | 8 | Pitch pick‑off output (cosine) | Complementary pitch signal | | 9 | Roll pick‑off output (sine) | AC signal proportional to roll attitude → to autopilot computer | | 10 | Roll pick‑off output (cosine) | Complementary roll signal | | 11 | Pick‑off excitation (AC reference) | Typically 10 VAC, 400 Hz, supplied by autopilot computer | | 12 | Panel lighting (HOT) | 5 V or 14 V dimmed lighting bus | | 13 | Panel lighting (GROUND) | Lighting return | | 14-15 | Shield / Chassis Ground | For EMI protection |
Apply primary DC power to the aircraft bus and verify the Gyro Warning Flag remains in view.
Exact pin numbers for these functions are not publicly available. An authentic installation manual is required to obtain the complete and accurate pinout. ki 256 installation manual
Also verify that your existing instrument panel has the correct cutout (standard 3‑inch attitude indicator hole) and that there is sufficient depth (approximately 8 inches) behind the panel for the KI‑256’s length.
The Ki 256 is a state-of-the-art electronic device designed for [specific purpose]. This manual will guide you through the installation process.
Identify the flight computer connector and wiring harness. 2.2 Mechanical Installation It fits into a standard 3-inch instrument hole
The KI 256 is designed for standard instrument panel mounting.
Allow the gyroscope to spool up undisturbed for at least 3 to 5 minutes.
: Apply a properly filtered and regulated 4.5 in. Hg vacuum source to spin up the gyro rotor. Allow the unit to stabilize completely for at least 15 minutes. An authentic installation manual is required to obtain
The KI‑256 uses a standard D‑subminiature connector (usually 15‑pin or 25‑pin, depending on the autopilot interface). The mounting tray must be securely attached to the instrument panel structure.
Verify the internal lighting illuminates and dims smoothly with the panel rheostat. Autopilot Alignment
Several modern avionics offer KI‑256 replacement:
