A Comparison of the Bell 525, the HC175, and the AW189.

This report provides a comparative analysis of three super-medium helicopters: the Bell 525 Relentless, Airbus H175, and Leonardo AW189. These helicopters are widely used for offshore transport, search and rescue (SAR), and VIP transport. The evaluation covers key features, advantages, and drawbacks of each model.

Bell 525 Relentless

Key Features

• First commercial helicopter with a fly-by-wire (FBW) system for improved stability and control.
• Garmin G5000H avionics providing advanced situational awareness.
• Cruise speed of approximately 160 knots, making it one of the fastest in its class.
• Large and customizable cabin for various operational needs.

Pros

• Enhanced safety and stability due to the FBW system.
• High-speed capability, improving mission efficiency.
• Modern avionics for superior pilot assistance and operational awareness.

Cons

• Delayed certification, affecting commercial availability.
• High acquisition and operational costs due to advanced technology.
• Limited operational history, making real-world performance assessment difficult.

Airbus H175

Key Features

• Proven operational track record since its service entry in 2015.
• Helionix avionics suite, offering advanced autopilot and flight control features.
• Optimized for offshore transport and SAR, with configurations supporting both roles effectively.
• Fuel-efficient design, reducing overall operating costs.

Pros

• Reliable and widely used in offshore operations.
• Smooth handling and comfortable ride for passengers and crew.
• Efficient fuel consumption, improving cost-effectiveness.
• Low noise and vibration levels, enhancing passenger experience.

Cons

• Slightly lower cruise speed (~150 knots) compared to the Bell 525.
• Cabin space is smaller than some competitors, though still well-configured.
• Lower payload capacity, making it less suitable for heavier transport missions.

Leonardo AW189

Key Features

• Versatile for SAR and offshore transport, with a strong operational presence.
• Twin-engine configuration utilizing FADEC-controlled GE CT7-2E1 engines for fuel efficiency.
• Advanced avionics with a 4-axis autopilot, improving stability and safety.
• Maximum seating for up to 19 passengers, supporting high-capacity operations.

Pros

• Strong SAR and offshore performance, well-suited for demanding environments.
• Good payload and range capabilities, providing operational flexibility.
• Advanced safety features ensuring enhanced reliability.

Cons

• Lower cruise speed (~145 knots) than the Bell 525.
• Higher maintenance demands, potentially increasing operational costs.
• Cabin comfort slightly less spacious compared to the Bell 525.

Conclusion

Each helicopter presents unique advantages and trade-offs:

• Bell 525 Relentless is the best choice for cutting-edge technology and speed but faces certification delays.
• Airbus H175 is a reliable, fuel-efficient, and well-proven option for offshore transport.
• Leonardo AW189 excels in SAR and heavy-lift operations, offering strong safety features and passenger capacity.

The selection depends on operational priorities, whether focused on speed, efficiency, or proven performance. Further assessment based on specific mission needs and budget constraints is recommended.