曝光台 注意防骗
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Expended or Jettisoned
Expended or Jettisoned
Expended or Jettisoned
Expended or Jettisoned
Expended or Jettisoned
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded
Fully Loaded Any
Any
Any
Any
Any
Any
Any
Any
Any
Any Fully Loaded
Fully Loaded
Fully Loaded
Jettisoned
Expended
Expended
Expended
Jettisoned
Jettisoned
Expended
Jettisoned
Jettisoned
4500
4500
.50 cal Gun
.50 cal Gun
.50 cal Gun
6-28
TM 1-1520-248-10
CHAPTER 7
PERFORMANCE DATA
SECTION I. INTRODUCTION
7-1. PURPOSE. performance data presented is within the applicable
limits of the helicopter.
The purpose of this chapter is to provide the best
available performance data for the OH-58D with a
T703-AD-700A (250-C30R) or OH-58D with a 250- 7-3. LIMITS.
C30R/3 engine. Regular use of this information will
enable you to receive maximum safe utilization from Applicable limits are shown on the charts. Performance
the helicopter. The information provided in this chapter generally deteriorates rapidly beyond limits. If limits are
is primarily intended for mission planning and is most exceeded, minimize the amount and time. Enter the
useful when planning operations in unfamiliar areas or maximum value and time above limits on DA Form
at extreme conditions. The data may also be used in- 2408-13-1 or 2408-13-1E so proper maintenance action
flight to establish unit or area standing operating can be taken.
procedures, and to inform ground commanders of
performance/risk trade-offs. Although maximum
performance is not always required, regular use of this 7-4. USE OF CHART.
chapter is recommended for the following reasons.
a. Chart Explanation. The first page of each
a. Knowledge of your performance margin will allow section describes the chart(s) and explains its uses.
you to make better decisions when unexpected
conditions or alternate missions are encountered. b. Reading the Charts. The primary use of each
chart is given in an example to help you follow the
b. Situations requiring maximum performance will route through the chart. The use of of a straight edge
be more recognized. (rule or page edge) and a hard fine point pencil is
recommended to avoid cumulative errors. The majority
c. Familiarity with the data will allow performance to of the charts provide a standard pattern for use as
be computed more easily and quickly. follows: Enter first variable on top left scale, move right
to the second variable, reflect down at right angles to
d. Experience w i l l be gained in accurately the third variable, reflect left at right angles to the
estimating the effects of variables for which data are fourth variable, reflect down, etc., until the final variable
presented. is read out at the final scale. In addition to the primary
use, other uses of each chart are explained in the text
accompanying each set of performance charts.
7-2. GENERAL.
NOTE
The data presented covers the maximum range of
conditions and performance that can reasonably be
expected. In each area of performance, the effects of An example of an auxiliary use of the charts
altitude, temperature, gross weight, and other referenced above is as follows: Although the
parameters relating to that phase of flight are hover chart is primarily arranged to find
presented. In addition to the presented data, your torque required to hover, by entering torque
judgement and experience will be necessary to available as required, maximum skid height
accurately obtain performance under a given set of for hover can be found. In general, any
circumstances. The conditions for the data are listed single variable can be found if all others are
under the title of each chart. The effects of different known. Also, the tradeoffs between two
conditions are discussed in the text accompanying variables can be found. For example, at a
each phase of performance. Where practical, data is given FAT and pressure altitude, you can
presented at conservative conditions. However, NO find the maximum gross weight capability as
GENERAL CONSERVATISM HAS BEEN APPLIED. All free air temperature changes.
7-1
TM 1-1520-248-10
7-5. DATA BASIS. d. Instrument Variations. The data shown in the
performance charts do not account for instrument
The type of data used in each performance chart is inaccuracies or malfunctions.
generally based on one of the four categories;
a. Flight Test Data. Data obtained by flight test of 7-8. PERFORMANCE DISCREPANCIES.
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OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPTER 2(64)
