ACN/PCN module in PEP Monique FUERI Director Operational Performance Presented by: - презентация

1 ACN/PCN module in PEP Monique FUERI Director Operational Performance Presented by:

2 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 2 Content ACN/PCN method ACN determination ACN/PCN PEP module Conclusion

3 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 3 Content ACN/PCN method ACN determination ACN/PCN PEP module Conclusion

4 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 4 ACN/PCN method Aim: Considering a runway with a given bearing strength, can a given aircraft with a given load operate on this runway without damaging the pavement ? Numerous methods developed: 44 methods in USA in the 80s 1982: ACN/PCN method developed by ICAO Former official ICAO method: LCN (Load Classification Number) still sometimes used.

5 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 5 The PCN expresses the bearing capacity of a pavement for unlimited operation The PCN is provided by airport authorities The PCN is qualified by: Pavement type Subgrade strength category Tire pressure category Pavement calculation method ACN/PCN method Pavement Classification number:

6 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 6 Pavement Classification Number: The PCN expresses the bearing capacity of a pavement for unlimited operation The PCN is provided by airport authorities The PCN is qualified by: Pavement type Subgrade strength category Tire pressure category Pavement calculation method ACN/PCN method Pavement type R : rigid F : flexible Pavement type R : rigid F : flexible

7 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 7 Pavement Classification Number: The PCN expresses the bearing capacity of a pavement for unlimited operation The PCN is provided by airport authorities The PCN is qualified by: Pavement type Subgrade strength category Tire pressure category Pavement calculation method ACN/PCN method Subgrade strength category A : high B : medium C : low D : ultra low Subgrade strength category A : high B : medium C : low D : ultra low

8 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 8 Pavement Classification Number: The PCN expresses the bearing capacity of a pavement for unlimited operation The PCN is provided by airport authorities The PCN is qualified by: Pavement type Subgrade strength category Tire pressure category Pavement calculation method ACN/PCN method Tire pressure category (maximum permissible tire pressure) W : no limit X : to 1.5 MPa Y : to 1.0 MPa Z : to 0.5 MPa Tire pressure category (maximum permissible tire pressure) W : no limit X : to 1.5 MPa Y : to 1.0 MPa Z : to 0.5 MPa

9 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 9 Pavement Classification Number: The PCN expresses the bearing capacity of a pavement for unlimited operation The PCN is provided by airport authorities The PCN is qualified by: Pavement type Subgrade strength category Tire pressure category Pavement calculation method ACN/PCN method Pavement calculation method T : technical U : using a/c experience Pavement calculation method T : technical U : using a/c experience

10 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 10 ACN/PCN method PCN 58 R / B / W / T Example : rigid pavement The bearing capacity of a rigid pavement resting on a foundation of medium strength has given, by technical assessment, a PCN = 58. There is no tire pressure restriction.

11 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 11 The ACN expresses the relative effect of an aircraft on a pavement for a specified standard subgrade ACN depends on aircraft parameters and runway parameters: Aircraft parameters: weight, C.G. position,landing gear geometry (twin gear or bogie), tire pressure Runway parameters: pavement type, subgrade category ACN/PCN method Aircraft Classification number:

12 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 12 ACN/PCN method Unrestricted operation if ACN is less or equal to PCN Overload operation is possible depending on country and airport policy. ICAO rule for overload operations: –10% PCN margin for flexible pavements –5% PCN margin for rigid pavements –Annual number of overload movements less than 5% of total annual movements

13 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 13 ACN determination ACN for Airbus aircraft can be determined using the Airplane Characteristics for Airport Planning Manual

14 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 14 Content ACN/PCN method ACN determination ACN/PCN PEP module Conclusion

15 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 15 ACN determination

16 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 16 ACN determination

17 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 17 Content ACN/PCN method ACN determination ACN/PCN PEP module Conclusion

18 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 18 ACN/PCN PEP module With the increasing number of Airbus aircraft and Airbus operators, more and more destinations have low strength runways. Runway loading aspects start playing an important role in landing fee determination. ACN determination with the curves presently published may be fastidious and lead to errors.

19 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 19 ACN/PCN PEP module New PEP module: ACN and LCN calculation DRAFT

20 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 20 ACN/PCN PEP module Compute ACN and LCN for every pavement type for given aircraft data Compute maximum aircraft weight for a given runway Possibility to introduce the PCN value of each runway in the airport database managed by the airport manager is being studied Provide a graphical output: ACN function of aircraft C.G. for a given pavement type

21 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 21 ACN/PCN PEP module Center of Gravity Position Influence Same ACN but several tons of Payload/Fuel difference ACNs defined at MRW and max aft CG

22 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 22 Content ACN/PCN method ACN determination ACN/PCN PEP module Conclusion

23 © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document. April 2007ACN/PCN module in PEPPage 23 Conclusion New ACN/PCN module will be fully integrated in the PEP user-friendly interface It will allow: ACN computation of a given aircraft Maximum aircraft weight for a given runway LCN computation Availability: mid-2008

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