Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 2-19
Pilot’s Operating Manual
Revision A1: Nov, 2002
Sub-section 2
PREFLIGHT
Hawker 800XP Pro Line 21
Section IV - FLIGHT PLANNING DATA
EQUIVALENT STILL AIR DISTANCE (ESAD) ALLOWANCES and RESERVE FUEL
When a Sector or Diversion is to be flown in other than zero wind conditions it will be necessary to
estimate an Equivalent Still Air distance (ESAD) for purposes of determining the fuel required.
ESAD values may be determined from the tables in this Sub-section, or calculated from the formula:
ESAD = Distance x Airspeed
Airspeed - Wind
In this Sub-section the following conventions will be used:
• Distances in nautical miles.
• Airspeeds and wind components in knots.
• Airspeed is the cruise true airspeed or the mean still air sector speed in knots.
• Headwinds are positive and tailwinds are negative.
The Tables in this sub-section give ESAD values over a range of sector distances for headwinds and
tailwinds of up to 160 knots. Data is provided for true air speed values of 350, 400 and 450 knots.
Cruise true air speeds may be determined from Figure 2 in Sub-section 1 - GENERAL (Speed and
Temperature Correction) or the sector distance may be divided by the still air sector time read from the
tables (High Speed, Intermediate and Long Range Procedures) of this Sub-section i.e.:
Cruise true air speed = Sector distance
Still air sector time
Crosswinds
Even with no headwind or tailwind component, the ESAD will be greater than sector distance if there is
a high crosswind. Increase ESAD if the conditions below apply:
Wind speed (irrespective of component) > 10% of airplane speed and either:
(a) Crosswind > Tailwind component
(b) Crosswind > 50% of headwind component
ESAD should be increased above the values read from the table or calculated from the formula by the
following amounts:
Wind Speed
Airplane True Air Speed
≤
0.1 0.2 0.3 0.4 0.5
Increase in ESAD zero +1% +3% +6% +12%