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CHAPTER  7A    PERFORMANCE DATA
Figure  7A-1-1.  Temperature Conversion Chart

TM-1-1520-240-10 Army CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-10 7A-1-2            c. Estimated Data.  Data based on estimates using aerodynamic theory or other means but not verified by flight test. 7A-1-6.  Specific Conditions. The data presented is accurate only for specific condi- tions listed under the title of each chart.  Variables for which data are not presented, but which may affect that phase of performance, are discussed in the text.  Where data is available or reasonable estimates can be made, the amount that each variable affects performance will be given. 7A-1-7.  General Conditions. In addition to the specific conditions, the following gener- al conditions are applicable  to the performance data. a. Rigging.  All  airframe  and  engine  controls  are assumed to be rigged within allowable tolerances. b. Pilot    Technique.  Normal    pilot    technique    is assumed. c. Aircraft    Variation.  Variations    in    performance between individual aircraft are known to exist: however, they are considered to be small and cannot be accounted for individually. d. Instrument  Variations.  The  data  shown  in  the performance   charts   does   not   allow   for   instrument inaccuracies or malfunctions. e. Airspeed Calibrations.  The airspeed calibration chart presents the difference between indicated airspeed (IAS), and calibrated airspeeds (CAS) for different flight conditions. f. Except as noted, all data is for clean configuration (all doors installed, without armament). g. Types  of  Fuel.  All  flight  performance  data  is based on JP-5 fuel.  The change in fuel flow and torque available, when using JP-4, JP-8, Aviation gasoline or any other approved fuels, is insignificant. 7A-1-8.  Performance Discrepancies. Regular use of this chapter will allow you to monitor in- struments and other aircraft systems for malfunction by comparing   actual   performance   with   planned   perfor- mance.  Knowledge will also be gained concerning the effects  of  variables  for  which  data  are  not  provided, thereby increasing the accuracy of performance predica- tions. 7A-1-9.  Definitions of Abbreviations. Capitalization and punctuation of abbreviations varies, depending upon the context in which they are used.  In general, full capital letter abbreviations are used in text material, charts and illustrations.  Periods do not usually follow abbreviations; however, periods are used with ab- breviations that could be mistaken for whole words if the period were omitted.







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