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values are stabilized. This will get rid of the discontinuity of the values, as both N1 and N2 "jump" quite a
lot in FS.
MaxMach=0.84
or
MaxMach=84
The cruise mach limit for barber pole.
Ceiling=45000
or
Ceiling=450
Maximum cruise altitude, defaults to 45000 ft/FL450
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106
TrimMin=6
TrimMax=16
TrimScaleMin=40
TrimScaleMax=40
Min/Max values for trim value (for takeoff) and maximum/minimum value of trim scale.
Flap Definitions
The next blocks of entries (in this particular case) represent the nine flap positions of the default B737-
400. These are 0 (translated to UP), 1, 3, 5, 15, 20, 25, 30, 40 in this particular case. The values are to be
understood as follows
• flppos (FS flap setting, scaled from 0 to 40, where 0 is flaps up, 40 is full flaps. Note: in this
example, the real flap setting of 25 is equal to flppos=20, but only because it is defined that way in
the aircraft.cfg fiile).
• flpset (Real flap setting, i.e. what the current flap setting's denomination is next to the flap lever
in the cockpit)
• vmax (Maximum speed for the particular flap position, in this case, for flaps up 340 IAS. This is
where the upper part of the barber pole in the PFD speed tape will end. It will be translated to
mach at high altitudes)... you can also use values such as vref40+70 (meaning the Vref for flaps 40
plus 70 knots).
• vret (Flap retraction speed for the flap bugs in the speed tape. At this speed, the flaps must be
retracted to the next higher setting, not possible when flaps are up, thus 0 for flpset=0, but set to
190 IAS for flpset=1, i.e. flaps should be retracted when passing this bug)
• vext (Speed at which the flaps have to be set to the next lower setting. For flpset=0 it is 210 IAS,
thus we have to extract flaps 1 when we are about to pass the bug)
• vmin (Minimum manoeuvering speed for the particular flap setting)
flppos=0
flpset=0
vmax=340
vret=0
vext=210
vmin=190
flppos=5
flpset =1
vmax = 230
vret = 190
vext = vref40+60
vmin= 170
flppos=10
flpset = 3
vmax = 227
vret = 180
vext = 180
vmin = 165
flppos=15
flpset = 5
vmax = 225
vret = 170
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107
vext = 170
vmin = 160
flppos=20
flpset=15
vmax = 195
vret = 160
vext = 150
vmin = 140
flppos=25
flpset=20
vmax=190
vret=150
vext=140
vmin=135
flppos=30
flpset=25
vmax=190
vret=150
vext=140
vmin=130
flppos=35
flpset=30
vmax=185
vret=140
vext=125
vmin=120
flppos=40
flpset=40
vmax=158
vret=120
vext=0
vmin=120
Note: Any flap speeds can also be defined in reference to a vref speed of a given flap setting
plus a value, e.g. vext=vref30+20 (i.e. vref of flaps 30 for a particular weight plus 20 knots.
The following two entries add the respective speed (in the first case 10 knots) to the speeds for the flap
settings above, when the gross weight of the aircraft passed the value specified in flpadd1. I.e. the vmin of
120 IAS for flpset=40 is increased to 130 when the gross weight is above 116700 lbs.
flpadd1=116700
flpkts1=+10
flpadd2=138200
flpkts2=+20
Project Magenta Revision: 26-May-07
108
V-Speeds
The table for the V1, V2 and VR speeds that follows is interpreted for a take-off at flaps 10 (vr=10). If no
other flap values are specified, then they are applied to the present flap setting. Each line starts with a
weight in pounds, the V1 speed, VR and finally V2. You can have as many entries as you wish, the values
are calculated linearly from one weight to the next. The table must be concluded with the line "vrend". The
values have to go from the smalles weight to the highest.
;v1,vr,v2 for flaps 10
vr=10
88200 113 114 130
93700 117 119 133
99200 121 123 136
104700 125 127 139
110200 129 131 142
115800 133 135 146
121300 137 139 149
126800 141 144 152
132300 144 148 155
137800 148 152 158
143300 151 155 161
148800 155 159 165
154300 158 163 168
vrend
The table for the Vref is similar to the table above. In this case the flap setting is 40 (vref=40). If no other
flap values are specified, then they are applied to the present flap setting. Each line starts with a weight in
pounds, followed by the Vref. You can have as many entries as you wish, the values are calculated linearly
from one weight to the next. The table must be concluded with the line "vrefend".
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