SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Calculate aircraft speeds and brake and wheel limitations 
SAQA US ID UNIT STANDARD TITLE
263026  Calculate aircraft speeds and brake and wheel limitations 
ORIGINATOR
SGB Aerospace Operations 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 10 - Physical, Mathematical, Computer and Life Sciences Physical Sciences 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 6  Level TBA: Pre-2009 was L6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
The person credited with this Unit Standard is able to calculate the VR, V1 and V2 for aircraft and the final climb speed to effect a safe initial climb. Learners will also be able to analyse the impact of aircraft landing weight on its landing speed as well as calculating the aircrafts actual landing speed. Learners will also be able to explain the influence of non-normal situations on landing reference speed. Learners will also be to ascertain the minimum turnaround time for aircraft taking into account prevailing conditions of temperature, pressure altitude and actual landing weight.

The qualifying learner is capable of:
  • Determining aircraft take off speeds.
  • Establishing landing reference speeds.
  • Calculating brake and wheel cooling periods. 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    Learners accessing this qualification will be assumed competent in:
  • Communication at NQF Level 5 or equivalent.
  • Mathematical Literacy at NQF Level 5 or equivalent. 

  • UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Determine aircraft take off speeds. 
    OUTCOME RANGE 
  • Aircraft take off speeds include consideration of take off weight and prevailing conditions of wind, temperature and pressure altitude on selected take off runway.
  • Aircraft take off speeds must meet minimum legal requirements. 

  • ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    V1 is calculated to comply with accelerate-stop and accelerate-go margins. 
    ASSESSMENT CRITERION RANGE 
    V1 includes V1/VR ratio, Vmcg and Vmbe check.
     

    ASSESSMENT CRITERION 2 
    VR is calculated to ensure lift off with engine failure at V1. 
    ASSESSMENT CRITERION RANGE 
    VR includes Vmu, Vmcg, Vmca-one engine out and tyre speed limits at lift off.
     

    ASSESSMENT CRITERION 3 
    V2 is calculated to ensure safe take-off after engine failure at V1. 
    ASSESSMENT CRITERION RANGE 
    V2 includes Vmu, V stall, Vmca-two engine out.
     

    ASSESSMENT CRITERION 4 
    Final climb speed is determined to effect safe initial climb after engine failure at V1. 
    ASSESSMENT CRITERION RANGE 
    Final climb speed includes climb at maximum continuous thrust after clean-up and minimum fourth segment gradient ability.
     

    SPECIFIC OUTCOME 2 
    Establish landing reference speeds. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Impact of aircraft landing weight on landing speed is analysed according to relevant factors. 
    ASSESSMENT CRITERION RANGE 
    Relevant factors include the impact of pressure altitude, outside air temperature (OAT), legal flap setting options, wind component, maximum tyre speeds, stall margin and organisational policy.
     

    ASSESSMENT CRITERION 2 
    Aircraft landing speed is calculated for the landing weight in order to maintain stall margin without exceeding structural load limits. 

    ASSESSMENT CRITERION 3 
    The influence of non-normal situations on landing reference speed is explained in terms of the usable range. 
    ASSESSMENT CRITERION RANGE 
    Non-normal situations include but are not limited to flap extension limit, speed brake inoperative, fifth pod carriage and hydraulic system inoperative.
     

    ASSESSMENT CRITERION 4 
    Flap setting is selected to keep Vref within practical range. 

    ASSESSMENT CRITERION 5 
    Changes to the drag and lift relationship resulting from non-normal configurations are explained in terms of its effect on Vref. 

    SPECIFIC OUTCOME 3 
    Calculate brake and wheel cooling periods. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The concept of heat build-up in aircraft brakes is assessed in terms of its impact on subsequent operations. 

    ASSESSMENT CRITERION 2 
    Minimum turnaround time is ascertained for prevailing conditions of temperature, pressure altitude and actual landing weight. 

    ASSESSMENT CRITERION 3 
    Brake cooling schedule is used to determine the cooling period required before subsequent aircraft movement may be undertaken. 
    ASSESSMENT CRITERION RANGE 
    Aircraft movement refers taxiing and takeoff.
     


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • An individual wishing to be assessed (including through RPL) against this unit standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA or an ETQA that has a Memorandum of Understanding in place with the relevant ETQA.
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA or an ETQA that has a Memorandum of Understanding in place with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard or assessing this unit standard must be accredited as a provider with the relevant ETQA or an ETQA that has a Memorandum of Understanding in place with the relevant ETQA.
  • Moderation of assessment will be conducted by the relevant ETQA at its discretion. 

  • UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
  • Aircraft takeoff speeds.
  • Aircraft landing speeds.
  • Aircraft brake and wheel cooling periods.
  • Impact of aircraft weight on landing speeds.
  • Aircraft systems. 

  • UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems which occur when determining the aircrafts takeoff and landing speeds and the wheel limitations. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage oneself and one's activities in order to ensure all the required information is at hand as and when needed. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information pertaining to the aircraft takeoff and landing speeds and brake and wheel cooling periods. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology to calculate aircraft speeds and wheel limitations. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems where incorrect calculations could have a devastating effect on the safety of the aircraft during takeoff and landing. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Glossary of terms:
  • V1 is engine failure decision speed.
  • V2 is minimum safe climb speed.
  • Vr is minimum rotation speed.
  • Vmu is minimum un-stick speed.
  • Vmca is minimum control speed air (one or two engines failed).
  • Vs is aircraft stall speed.
  • Vmcg is minimum control speed ground.
  • Vmbe is maximum speed brake energy. 

  • QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  66109   National Diploma: Aircraft Performance Engineering  Level 6  NQF Level 06  Passed the End Date -
    Status was "Reregistered" 
    2016-12-31  TETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.