7A-1-7. General Conditions.

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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