-
Notifications
You must be signed in to change notification settings - Fork 1
/
Readme-747-200-jbsim.txt
198 lines (149 loc) · 5.6 KB
/
Readme-747-200-jbsim.txt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
747-200 real data
==================
Weight limit (A) :
maximum (takeoff) : 833000 lb.
landing (recommended) : 630000 lb.
VMO/MMO : 375/0.92 (A).
VNE/MNE : 445/0.95 (B).
Ceiling : 45100 ft (C).
747-200 ops
===========
See help.xml and Dialogs/747-200-help.xml.
Takeoff : - rotation 180 kt (full load), 170 kt (landing load), flaps 20 (D1).
Climb : - flaps retraction scheduled with autothrottle (D2).
- 1000 ft/min, 220 kt until 5000 ft (G).
- 300 kt above 10000 ft (G).
- 1500 ft/min until FL150 (G).
- 1200 ft/min until FL240 (G).
- 1000 ft/min, 0.82 mach until cruise (G).
Descent : - 1000 ft/min, 0.84 mach until FL240 (G).
- decelerate to 290 kt until FL100 (G).
- 250 kt until approach (G).
Landing : - 154 kt (landing load), 140 kt (empty tank) (D1).
Installation
============
Fuel load
---------
- default is maximum landing weight, 630000 lb.
- for alternate load, press "= f" (saved on exit in aircraft-data).
Known compatibility
-------------------
2019.1.2 : minimal version.
Keyboard
========
Views
-----
- "ctrl-E" : toggle "E"ngineer view.
- "ctrl-K" : toggle Observer view (floating).
- "shift-ctrl-V" : reset view pitch.
- "shift-ctrl-X" : reset floating view.
- "shift F5/F6" : move floating view in length.
- "ctrl F5/F6" : move floating view in height.
- "shift F7/F8" : move floating view in width.
- "F9" : toggle nearby view.
Same behaviour
--------------
- "S" : "S"waps between Captain and Center 2D panels.
- "F12" : radio frequencies.
Improved behaviour
------------------
- "a / A" : speeds up BOTH speed and time (until X 15).
Automatically resets to 1, when above 2000 ft/min.
- "left / right" : autopilot heading (knob).
- "up / down" : increases / decreases (knob) autopilot altitude.
Altitude hold, vertical speed hold.
- "page up / : increases / decreases (knob) autothrottle.
page down" Speed hold, Mach hold.
Alternate behaviour
-------------------
- "ctrl-T" : toggle al"T"itude hold.
- "=" : menu.
Additional behaviour
--------------------
- "q" : quit speed up.
- "ctrl up / : increases / decreases (knob) autopilot altitude (slow).
ctrl down" Altitude hold, vertical speed hold.
- "F4" : open navigation dialog.
- "F8" : toggle help on other keys.
Disabled
--------
- "ctrl-P".
- "ctrl-W".
Mouse
=====
Autopilot
---------
- avoid default autopilot setting (F10 key), use 2D panel or 3D cockpit.
Consumption
===========
Cruise Mach 0.84 for 1 engine :
- full load, 900 gallons/h at 30000 ft.
- empty fuel, 1050 gallons/h at 38000 ft.
All with lateral wind.
Example
-------
KMSP - RJAA (E), 5300 NM :
- load --flight-plan from Doc.
- at 12h45 zulu (morning), takeoff at full load (55212 US gal).
- warm, with light adverse alofts.
- cruise starts at 30000 ft, +2000 ft every 2h30, until 38000 ft.
- after 11h45, lands in the morning with 8200 gallons (1000 gallons/h); or 2h / 920 NM.
Typical city pair (F) KJFK - RJAA (6000 NM) is not possible at full load (A).
JSBSim
======
- geometry is real data.
- center of gravity inside corridor.
- extended range 7500 NM (6200 NM at full load), without wind (A).
- 747 coefficients.
TO DO
=====
- 3D instruments.
- systems.
Known problems
==============
- data are not saved on reinit.
- use turn at maximum angle, only to stop taxi.
- from Mach 0.82, Mach drag delays altitude modes, when velocity increases.
- approach steady below the glide slope, otherwise descent overspeed triggers inertia roll.
- if misalignment of fonts over 2D textures, restore the 2006 version of Fonts/Helvetica.txf.
Known problems FDM
------------------
- descent rate too slow (G) ?
Known problems autopilot
------------------------
- toggle INS mode, only AFTER activation of route, or use "= a".
- NAV hold mode is sensitive to the turbulence of the ground layer.
- beyond 15 NM, nav hold makes wide rolls.
- yoke rolls with nav hold.
Known problems autoland
-----------------------
- nav must be accurate until 0 ft AGL : KSFO 28R, RJAA 34L are correct;
but EGLL 27R, KJFK 22L are wrong : to land at these airports,
set /controls/autoflight/real-nav to false, by "= a".
- glide slope must be accurate until 250 ft AGL : real should be 100 ft,
but nose tends to dive to catch the slope (simplistic autopilot or wrong glide slope ?).
Known problems OSG
------------------
The following artefacts are supposed to be solved by OSG :
- panels swaping too early.
- instrument transparent through layer with alpha (observer view).
- no emission adjustment (always white) on osg text, with osg greater than 3.4.0.
References
==========
(A) http://www.boeing.com/ :
(747 airplane characteristics, D6-58236 - May 1984).
(B) http://www.bh.com/companions/034074152X/appendices/data-a/table-3/table.htm :
(C) http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/MainFrame?OpenFrameSet :
(FAA certificate, a20we - 23 December 1970, 747-200B).
(D1) http://www.airliners.net/discussions/tech_ops/read.main/52218/6/#ID52218 :
V2 190 kt (max takeoff load), climbs with no flaps at V2 + 100 kt, VREF 154 kt (max landing load).
(D2) http://www.airliners.net/discussions/tech_ops/read.main/72686/6/#ID72686 :
retract V2 + 80, for maneuver V2 + 100; extend Vref + 80.
(E) http://www.airlineroutemaps.com :
KDTW - RJAA is 5800 NM (Northwest Airlines).
(F) http://www.boeing.com/ :
747 Classics.
(G) http://elearning.ians.lu/aircraftperformance/ :
https://www.flight-manuals-online.com :
TWA flight manual.
8 February 2020.