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Example ComputationBoeing 737-300 (a medium size jet transport) flies at 250knots (IAS) at an altitude of 5.0 km. in a standardatmosphere. What is TAS?A quick glance at the ISA Table reveals that air density at5.0 km. is about 0.736 kg/m 3 thus resulting in a true machnumber of 0.4824 (use Equation 10).Since the speed of sound at that altitude is 320.5 m/s (seeTable) then the true airspeed of the aircraft is 154.62 m/sor 300.56 knots.Virginia Tech - Air Transportation Systems Laboratory 20
Sample Computation (continuation)Note that in this case there is a difference of 50.56 knotsbetween IAS and TAS.As the aircraft climbs the value of TAS increases even ifIAS remains constant. True Airspeed (TAS) is needed toestimate Ground Speed (GS).GS is ultimately responsible for the travel time betweenairports and thus it is important to learn how to estimateTAS for any feasible flight condition.Later analysis will introduce more details on how toestimate travel times between Origin-Destination airportsVirginia Tech - Air Transportation Systems Laboratory 21
Page 2 and 3: Introductory RemarksAir vehicles ar
Page 4 and 5: Aircraft Performance Basics(Interna
Page 6 and 7: Basic Relationships to Uderstand th
Page 8 and 9: Atmosphere with Constant Temperatur
Page 10 and 11: Atmosphere with Linear Temperature
Page 12 and 13: Atmosphere with Linear Temperature
Page 14 and 15: International Standard AtmosphereCh
Page 16 and 17: Important Aircraft Speed Terms to K
Page 18 and 19: Air Compressibility EffectsA mathem
Page 22 and 23: Sample Matlab Code Used (ISAM.m)Vir
Page 24 and 25: Plot of CAS vs. TAS (Subsonic Aircr
Page 26 and 27: Aircraft Runway Length PerformanceE
Page 28 and 29: Functional Forms of the ForcesThe f
Page 30 and 31: Notes on Various Parameters1) C L a
Page 32 and 33: Remarks About the Aircraft Accelera
Page 34 and 35: Flap Angle• Angle formed between
Page 36 and 37: Remarks• The mass of the aircraft
Page 38 and 39: • At large flap angles (> 25 degr
Page 40 and 41: A Word on Stalling and Lift-off Spe
Page 42 and 43: These considerations are necessary
Page 44 and 45: Integration of Acceleration Equatio
Page 46 and 47: Aircraft Speed During Takeoff RollN
Page 48 and 49: Takeoff Roll Distance vs. Aircraft
Page 50 and 51: General Procedure for Runway Length
Page 52 and 53: FAR Certification ProceduresFAR 25
Page 54 and 55: Landing Distance CaseThe landing di
Page 56 and 57: Engine-Out Takeoff CaseDictated by
Page 58 and 59: Runway Length Procedures (AC 150/53
Page 60 and 61: Contents of Advisory Circular 150/5
Page 62 and 63: Groupings Method AC 150/5325-4 (Fig
Page 64 and 65: Sample Calculations (FAA AC 150-532
Page 66 and 67: a) If MALW > DTW use DTW in your co
Page 68 and 69: III) Landing and Takeoff Runway Len
Page 70 and 71:
I) Landing Analysisa) Estimate the
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Simple interpolation for a flap ang
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c) Compute the takeoff runway lengt
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Runway Length Analysis usingAircraf
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IAD-BGR TripIAD4,200 nmBGRVirginia
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Boeing 777-200 (GE Engines)Virginia
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Computation of Fuel WeightThis anal
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Explanation of Payload-Range Diagra
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Payload-Range Diagrams Explanations
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Sample Payload Range DiagramsPayloa
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Payload Range Diagrams (B777)Virgin
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Payload Range Diagrams (A320)Virgin
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Payload Range Dagrams (A380)Virgini
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Presentation of Runway Length Infor
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Boeing 777-200 HGW Takeoff Performa
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Landing AnalysisThis analysis is si
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Reconcile Takeoff and Landing Cases
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Other Considerations in Runway Leng
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Some Runway Design TermsThe followi
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Sketch of RPZVirginia Tech - Air Tr
Page 110 and 111:
Runway Object Free Area (ROFA or OF
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OFA Dimensions (Approach Cat. C and
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Example Runway Design for Boeing 77
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Climb PerformanceMany airport and a
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Climb Performance Model Simplificat
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Final Derivation of Climb Rate Expr
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Modeling Aircraft Thrust• Thrust
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Sample Thrust Variations (PW JT9D E
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Takeoff Thrust Variations with Spee
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Variations of Cruise TSFC (PW JT9D
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Typical Rate of Climb EnvelopeItera
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