KV-11 altitude corrector is a component of the automatic flight control system used on Mi-8/Mi-17 series helicopters, including Mi-8T, Mi-8MT, Mi-8AMT, Mi-8MTV-1 and Mi-17 variants. The unit generates height-dependent corrective signals that allow the AP-34B autopilot to stabilize vertical flight and maintain commanded altitude with reduced pilot workload.

The device converts changes in barometric altitude into proportional electrical output, which is processed by amplifiers and sent to executive channels controlling pitch trim and altitude hold. KV-11 supports both steady-state cruise control and transitions during climb, descent and hovering, ensuring improved stability and automatic damping of altitude deviations.

The module is powered simultaneously from the aircraft’s 27-V DC bus and the 36-V 400-Hz three-phase AC network. KV-11 operates effectively across a wide operating envelope — from sea level to 20,000 meters — and is designed to dynamically match atmospheric pressure change to altitude compensation.

KV-11 belongs to certified aviation technical equipment and is installed as part of the AP-34B autopilot set.

Alternate Designations:
KV-11 may also appear as KV11, КВ-11, KB-11.
All refer to the same unit.

Purpose: Generate vertical stabilization and altitude compensation signals
Systems: AP-34B automatic flight control, vertical stabilization channel
Application: Mi-8, Mi-8T, Mi-8MT, Mi-8AMT, Mi-8MTV-1, Mi-17
Product Type: Altitude corrector
DC Power Supply: 27 ±2.7 V
AC Power Supply: 36 ±2 V, 400 ±8 Hz
AC Current Consumption: ≤0.3 A in each phase
DC Current Consumption: ≤0.1 A
Maximum Tracking Rate: Equivalent to ~200 m/s climb/descent rate
Operating Altitude Range: 0–20,000 m
Potentiometer Stroke Range: 160–320 m span at 20,000 m
Potentiometer Slope Limits:
— At 1 km: ≤20 m
— At 12 km: ≤8 m
— At 20 km: ≤3 m
Category: Aviation Technical Equipment (ATE)
Mounting: Installed within autopilot equipment bay
Condition: As applicable
Documentation: Manufacturer passport and operation manual

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