EUROCOPTER
FLIGHT MANUAL BO 105 CB-5/CBS-5
5 - 1
LBA APPROVED
Rev. 0
S E C T I O N 5
P E R F O R M A N C E D A T A
5.1 GENERAL
This section contains the performance information necessary for preflight and inflight plan-
ning. The information is primarily intended for mission planning and is most useful when
planning operations in unfamiliar areas or at extreme conditions. Although maximum per-
formance is not always required, regular use of the information in this section is recom-
mended for the following reasons:
– Knowledge of performance margins will allow better decisions when unexpected
conditions or alternate missions are encountered.
– Situations requiring maximum performance will be more readily recognized.
– Familiarity with the data will allow performance to be calculated more easily and
quickly.
– Experience will be gained in accurately estimating the effects of conditions for which
data is not presented.
5.1.1 Definitions
Some terms which are used particularly in this section are defined as follows:
5.1.1.1 Airspeeds
IAS The indicated airspeed is the reading obtained on a pitot-static airspeed indicator
having no instrument calibration error. If the calibration error of the particular instru-
ment is not known, then the actual reading may be considered as equal to IAS be-
cause the tolerances permitted on the instrument are small.
CAS The calibrated airspeed is the IAS-value corrected for pitot-static position errors
only.
TAS The true airspeed of the helicopter, relative to undisturbed air, can be obtained by
multiplying the CAS value by the true airspeed factor, if compressibility is neglected.
V
NE
The never exceed speed, IAS.
V
Y
The speed for best rate of climb = 60 KIAS.
5.1.1.2 Height
The true vertical clearance between the lowest part of the helicopter and the ground.
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