Helicopter Emergency Medical Services (HEMS) aircraft are currently adaptations of existing helicopter models, which, whilst adequate, are limited in their ability to serve the specific needs of the HEMS mission. The HALO project presents a novel design in the 3,500-ton class that utilises coaxial rotors for lift, capable of cruising at 140 kts with a range of over 600 km. Powered by twin Honeywell HTS9000 engines, HALO includes advanced aerodynamic features such as active flow control to minimise fuel burn and improve cruise speed. The H tail allows for rear loading and best-in-class turnaround times, whilst the onboard electronics and air conditioning provide for up to 35,000 W of auxiliary power for clinical equipment. Advanced stability augmentation allows for a smooth ride for clinicians and patients alike, with gust correction and multichannel tracking.
HER01 - Project Coordinators
- Project coordination & information management
- Cost estimation and market analysis
- Conceptual trade-off studies & design
- Compliance with all relevant design standards and regulations
HER02 - Aerodynamics
- Rotor(s) design
- Design of lifting surfaces
- Airfoil selection & design & optimizations
- Fuselage and empennage aerodynamic design
HER03 - Structural Design & CAD
- Prediction of design loading conditions
- Rotor structural design and dynamic blade behaviour
- Selection of aircraft structural layout and sizing of major components
- Material and manufacturing method selection
- Landing gear design
- Hub design
- CAD modelling
HER04 - Systems & Propulsion
- Powerplant type selection & integration
- Powerplant sizing and performance prediction
- Transmission considerations
- Vehicle sub-systems selection & sizing, layout and integration
- Sensors and avionics
- Weight & Balance prediction
- Medical and mission-specific equipment
HER05 - Flight Mechanics, Performance & Control
- Mission definition and operations
- Vehicle static and dynamic stability prediction
- Response to control inputs
- Design of flight control system
- Aircraft performance prediction
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