2281B

2281B System Overview

The 2281B is an aircraft air-oil radiator designed for cooling lubrication oil in helicopter engine and main gearbox systems. The unit operates as part of the onboard thermal management system, ensuring stable operating conditions of critical assemblies during flight.

2281B Cooling Function

The radiator performs heat exchange between lubricating oil and ambient airflow, maintaining required temperature limits within engine and transmission lubrication systems. The design ensures effective cooling under varying operational and environmental conditions.

2281B Aircraft Application

The unit is installed on helicopters of the Mi-8 family and its modifications, where it functions as a standard component of oil cooling systems for both engine and main gearbox circuits.

2281B System Integration

The radiator is constructed as a dual-section unit with independent cooling circuits for engine and gearbox oil. It is integrated into the aircraft lubrication system and is interchangeable with modern equivalents used in similar applications. The product is also known under alternative designations 2281B and ВМР 2281Б.

Product Type: Air-oil radiator (heat exchanger)
Function: Cooling of engine and main gearbox lubrication oil
Application / Where Used: Helicopter oil cooling systems
System / Installation Area: Engine and main gearbox lubrication system
Compatible Aircraft / Equipment: Mi-8 family helicopters
Configuration: Dual-section radiator (engine oil / gearbox oil)
Cooling Surface (Engine Section): Not specified
Cooling Surface (Gearbox Section): Not specified
Number of Tubes (Engine Section): 12
Number of Tubes (Gearbox Section): 18
Material: Aluminum alloy (core and collectors)
Maximum Oil Pressure (Inlet): Not specified
Thermostat Setting Pressure: Not specified
Destructive Pressure: Up to 10 kgf/cm²
Maximum Oil Temperature (Inlet): Not specified
Dimensions: ~500 × 400 × 110 mm
Weight (Dry): ~13–15 kg
Weight (With Oil): Increased by ~1.5–2 kg depending on oil volume
Interchangeability: Analog of 5349T (VMR 5349T)
Technical Documentation: Product passport and operational documentation

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

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

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

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.