Eurocopter BK117: history, specifications and applications
The Eurocopter BK117 is a multi-role twin-engine helicopter developed by Messerschmitt-Bölkow-Blohm (MBB) in Germany and Kawasaki Heavy Industries in Japan. Its versatility, reliability and capabilities have made it an ideal aircraft for emergency missions, passenger transport and police and military operations. Since its introduction in the 80s, it has evolved to become a reference in medium helicopter aviation.
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History and development of the Eurocopter BK117
Development of the BK117 began in the 1970s, when MBB and Kawasaki decided to collaborate on the creation of a helicopter that would combine the strengths of both companies.
- MBB brought its expertise in rigid rotor system design and advanced avionics.
- Kawasaki was responsible for the airframe structure and the manufacture of several key components.
The first flight of the Eurocopter BK117 took place on 13 June 1979, and after a period of testing and certification, it entered service in 1982. Its robust design and spacious cabin made it a highly demanded aircraft in sectors such as medical aviation, police and emergency services.
In the 1990s, the BK117 evolved into the Eurocopter EC145, which incorporated technological improvements and increased performance. Today, the legacy of the BK117 lives on in modern EUROCOPTERS helicopters, such as the H145.
Technical specifications of the BK117
The Eurocopter BK117 is characterized by its compact design, high maneuverability and ability to operate in harsh environments.
Below are its main technical specifications:
| Specification | Detail |
|---|---|
| Maker | MBB (Germany) / Kawasaki (Japan) |
| First flight | June 13, 1979 |
| Engines | 2 × Turbomeca Arriel 1E or LTS 101-750B-1 |
| Maximum speed | 278 km/h |
| Cruising speed | 250 km/h |
| Autonomy | 675 km |
| Capacity | 7-10 passengers + 2 crew |
| Maximum take-off weight | 3,350 kg |
| Operating altitude | 5,500 m |
The modular design of the BK117 allows for specialized configurations for medical transport, tactical operations, and rescue in hard-to-reach areas.
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Versions and variants of the Eurocopter BK117
Since its launch, the BK117 has undergone several modifications to improve its performance and adaptability to different missions.
BK-117 A-1 (1982)
- First production version.
- Lower power starter engines.
BK-117 A-3 (1985)
- Larger tail rotor.
- Increase in maximum take-off weight.
BK-117 B-1 (1987)
- Introduction of more powerful LTS 101-750B-1 engines.
- Increased payload capacity.
BK-117 C-1 (1992)
- Equipped with Turbomeca Arriel 1E engines.
- Advanced avionics and increased stability.
BK-117 C-2 / EC145 (1999 – present)
- Evolution of the BK-117 with a larger cabin and longer range.
- It became the Eurocopter EC145, and later the Airbus H145.
Applications of the Eurocopter BK117
The BK117 is renowned for its versatility and ability to operate in a variety of environments. Its main applications include:
Medical Emergencies and Medical Transport (EMS)
The BK-117 is a preferred choice for medical and air rescue helicopters. Its design allows:
- Enough space to carry stretchers and medical equipment.
- Easy access to the cabin for quick patient evacuation.
- Landing capabilities in confined areas.
Police and security operations
Many police and security forces around the world use the BK-117 to:
- Aerial surveillance and traffic control.
- Fast transport of tactical units.
- Urban search and rescue operations.
Executive and VIP transportation
Thanks to its spacious cabin and stable flight, the BK-117 has also been used in the transport of executives and authorities.
Search and rescue (SAR) missions
The BK-117 is an ideal aircraft for SAR missions, with the ability to operate at high altitudes and adverse weather conditions.
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BK-117 Safety and Technology
The Eurocopter BK-117 was designed with a strong focus on safety and reliability. Some of its features include:
- Redundant avionics and flight controls system, which allows to continue operating in the event of failures.
- Reinforced structure that improves resistance in forced landings.
- Modern avionics, with advanced navigation systems and ground proximity alerts.
- Efficiently designed rotors, which provide stability and reduce vibrations.
Maintenance and spare parts for the Eurocopter BK-117
Proper maintenance is essential to ensure the safety and longevity of the BK-117. Among the services and spare parts available for this aircraft, the following stand out:
- Covers and protections for conservation in hangars.
- Aeronautical labels for identification and operational safety.
- State-of-the-art avionics and monitoring systems.
At Indaero, we offer solutions for the protection and maintenance of the BK-117, ensuring that this aircraft can continue to operate with maximum efficiency and safety. If you are looking for aeronautical protections and labels for the BK-117, at Indaero we have a wide range of products to keep your helicopter in optimal operating conditions.
Need more information or a quote? Contact us and we will advise you with customized solutions for your aircraft.