APD-88 Series 4

APD-88 Series 4 System Overview

The APD-88 Series 4 is an aircraft engine start automatic control unit designed as an electromechanical programmed device for automated control of engine start processes within onboard systems of helicopters and fixed-wing aircraft.

APD-88 Series 4 Control Function

The unit controls the sequence of activation and deactivation of engine start system components, including starter operation, fuel supply, ignition systems, and transition to normal engine operation, ensuring execution of the start cycle according to a predefined timing program.

APD-88 Series 4 Aircraft Application

The device is used on helicopters and aircraft equipped with turboprop and turboshaft engines, including platforms such as Mi-8 (Mi-17), Ka-32, An-24, and An-26, where it supports automated engine start procedures.

APD-88 Series 4 System Integration

The unit operates in conjunction with onboard engine systems and cockpit controls, using a cam-based programmed mechanism to generate control signals for ignition units, fuel valves, and starter contactors. The product is also known under alternative designations APD-88 Series 4 and АПД-88 серия 4.

Product Type: Electromechanical programmed engine start control unit
Function: Automatic control of engine start sequence
Application / Where Used: Aircraft engine start systems
System / Installation Area: Engine start control system
Compatible Aircraft / Equipment: Mi-8 (Mi-17), Ka-32, An-24, An-26
Compatible Engines: TV3-117; AI-24
Operating Voltage: 27 V DC
Number of Programs: Typically 2 (ground start; air start)
Operating Modes: Start; Rotation (without fuel and ignition)
Cycle Duration: Approximately 30–55 s
Start Termination: Automatic shutdown after completion of programmed cycle or unsuccessful start
Control Functions: Starter control; ignition activation; fuel valve control; switching to operating systems
Programming Mechanism: Camshaft with profile discs and microswitch actuation
Drive Mechanism: Electric motor with gearbox driving camshaft
Construction Type: Electromechanical programmed unit
Interchangeability: Series 4 differs from earlier series by adjusted timing parameters
Technical Documentation: Product passport and operational documentation

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In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.