Gr

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
PROHIBITED AREA
SAFE LANDING
height
O
speed
5
Origin of the project(II) The regulation
- Compatibility between T/O and Landing
trajectories // Regulation
PROHIBITED AREA
SAFE LANDING
height
O
speed
6
Origin of the project(IIbis) The operational
context
- Compatibility between T/O and Landing
trajectories // Regulation
PROHIBITED AREA
SAFE LANDING
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
• gt Determination of the consistent parameters
• Horizontal/Vertical speed, Rotor lift
• Pitch, Roll, Yaw attitude
• gt 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
• gt landing skids / wheels
• gt influence of the configuration

10
Final objective

• Survivable Height / Speed Envelope
• ( low part especially)

Current envelope No injury only material damage
No serious injury Material
damage Forbiden area Serious injuries
Loss of the a/c
h
0
s
11
Helicopter
Survivable Height / Speed envelope


END

• Thank you for your attention