SECTION II
DATA CRITERIA
5-3 DATA BASIS
The type of data used is indicated at the bottom of each performance
chart under DATA BASIS. The applicable report and date of the data are
also given. The data provided generally are based on one of three cat-
egories:
a.
Derived From Actual Controlled Testing.
Controlled test data
obtained on a similar unit type.
b.
Calculated Data.
Data based on tests, but not on a similar unit
type placed under a controlled test.
c.
Estimated Data
. Data based on estimates using rules of physics,
mathematics, and electrical engineering principles and concepts, but
not verified by tests.
5-4. SPECIFIC CONDITIONS
The data presented are accurate only for specific conditions listed
under the title of each chart or graph. Variables for which data are
not presented, but which may affect that phase of performance, are dis-
cussed in associated text. Where data is available or reasonable esti-
mates can be made the amount that each variable affect performance will
be given.
5-5. GENERAL CONDITIONS
In addition to the specific conditions, the following general condi-
tions are applicable to the performance data.
a.
Variation in Aircraft.
Power demand differences between indi-
vidual aircraft of the same make and model are known to exist due to
variations in DC electrical system efficiency. These differences,
however, are considered insignificant and are not individually ac-
counted for.
b.
Aircraft Instrument Variations.
The data shown in the perfor-
mance charts do not account for instrument tolerance differences or
inaccuracies.
5-6. DEFINITIONS OF ABBREVIATIONS
Unless otherwise indicated, the abbreviations defined in Chapter 1 will
be applicable to all charts and graphs in this chapter.
5-2