Specifications

SECTION VII
MODEL 560 FLIGHT PLANNING AND PERFORMANCE
CRUISE
Specific performance data are presented on the following pages for various combinations of fan
speeds, weights, temperature, altitudes and winds to enable the calculation of the cruise portion of a range
profile.
The various fan speeds presented provide the specific ranges between maximum cruise thrust
(maximum TAS) and the approximate maximum range thrust. It should be noted that reducing thrust to
maintain a constant indicated airspeed as the airplane weight decreases during cruise results in a significant
increase in range. The best range, however, results from decreasing thrust to fly a constantly decreasing
airspeed as airplane weight decreases per the values shown in the tabulated data.
When the anti-ice systems are ON, increase the fuel flows and decrease the specific ranges that are
presented for each altitude by 10 percent. The cruise speeds will remain the same for a given fan RPM
(N
1
). The maximum allowable fan speeds with anti-ice systems ON are presented on each chart for each
altitude. Only fan speeds equal to or lower than these values can be used.
The one engine specific range data is presented for use in the event of an enroute engine failure.
I 56OMB-01 Configuration AA 7-61