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TI2500 GPU-24
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Section 7 – Performance Data
7.1 – Purpose
This section provides performance data for the unit. Continual reference to this information will enable the user
to obtain maximum performance, utilization and service life from the unit. Although maximum performance
is not always required, regular referral to this section is recommended for the following reasons:
To generate knowledge of unit’s performance margins to enable the operator to make sound judgment when A.
unexpected conditions or alternate operational requirements are encountered.
To enable the user to readily recognize situations requiring maximum performance.
B.
To gain experience in accurately estimating the effects of variables for which data is not presented. C.
To help the operator determine if a vehicle or an aircraft system malfunction exists by comparing actual D.
performance with expected performance.
7.2 – General
The data presented covers the maximum range of conditions and performance that can reasonably be
expected. In each area of performance, the effects of temperature and dc electrical load demand relating to
the ground power support requirements are presented. Wherever practical, data is presented conservatively.
However, NO GENERAL CONSERVATISM HAS BEEN APPLIED. All performance data presented is within the
applicable limits of the unit
7.3 – 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 categories:
Derived From Actual Controlled Testing: Controlled test data obtained on a similar unit type. A.
Calculated Data: Data based on tests, but not on a similar unit type placed under a controlled test.
B.
Estimated Data: Data based on estimates using rules of physics, mathematics, and electrical engineering C.
principles and concepts, but not verifi ed by tests.
7.4 – Specifi c Conditions
The data presented are accurate only for specifi c 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 discussed
in associated text. Where data is available or reasonable estimates can be made the amount that each
variable affect performance will be given.
7.5 – General Conditions
In addition to the specifi c conditions, the following general conditions are applicable to the performance data.
Variation in Aircraft: Power demand differences between individual aircraft of the same make and model A.
are known to exist due to variations in dc electrical system effi ciency. These differences, however, are
considered insignifi cant and are not individually accounted for.
Ground Support and Aircraft Instrument Variations: The data shown in the performance charts do not B.
account for instrument tolerance differences or inaccuracies.
NOTE
!
The information provided in this section is primarily intended for operational
planning and is most useful when planning operations under unfamiliar
conditions or environmental extremes. The data may also be used to
establish local operating procedures and to ensure unit’s operational life is
maximized.