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Helicopter Survivable Height / Speed envelope

This document by Grégory Caudy from SFACT and DGAC France outlines pivotal research on the Helicopter Survivable Height/Speed Envelope. It discusses the origins and evolution of the program, including insights from international cooperation and various domains such as occupant survivability and environmental impacts. The study analyses accident data and conducts experimental validations to define a safe operational envelope for helicopters. Emphasis is placed on regulatory coherence and key findings that aim to minimize injuries during emergency landings.

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Helicopter Survivable Height / Speed envelope

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  1. Helicopter Survivable Height / Speed envelope Grégory Caudy, SFACT, DGAC France Research and Experience Feedback Office

  2. Helicopter H/S envelope Outlines - The SFACT research activities - Origin of this research program - Description of the study

  3. SFACT Research activities - Evolution of the regulation - Various domains Occupant survivability, Human factors, External hazards, Environment and Innovation - International cooperation JAA RC, CSRTG, …

  4. Origin of the project - The Height / Speed envelope SAFE LANDING PROHIBITED AREA height O speed

  5. Origin of the project(II) The regulation - Compatibility between T/O and Landing trajectories // Regulation SAFE LANDING PROHIBITED AREA height O speed

  6. Origin of the project(IIbis) The operational context - Compatibility between T/O and Landing trajectories // Regulation SAFE LANDING PROHIBITED AREA height O speed

  7. Origin of the project (III) - The Height / Speed envelope - Compatibility between T/O and Landing trajectories // Regulation - Coherence between JAR 27/29 and JAR OPS3 Safe emergency landing

  8. Description of the study - Theoretical part : 1 year Analysis of accident and flight test data > Determination of the consistent parameters Horizontal/Vertical speed, Rotor lift Pitch, Roll, Yaw attitude > Determination of the survivable envelope Development of a structure model JAR 27/29 helicopter Survivable vertical speeds

  9. Description of the study (II) - Experimental part : 2 years Validation of the model Simulation of the h/s envelope for > landing skids / wheels > influence of the configuration

  10. Final objective Current envelope No injury only material damage No serious injury Material damage Forbiden area : Serious injuries Loss of the a/c h Survivable Height / Speed Envelope ( low part especially) 0 s

  11. Helicopter Survivable Height / Speed envelope END Thank you for your attention

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