getting to grips with aircraft performance 如何掌握飞机性能 1(8)

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30 000 29 000 28 000 27 000 26 000  - 44.4 - 42.5 - 40.5 - 38.5 - 36.5  301 315 329 344 360  4.36 4.57 4.78 4.99 5.22  8.89 9.30 9.73 10.17 10.63  0.2970 0.3107 0.3250 0.3398 0.3552  0.3741 0.3881 0.4025 0.4173 0.4325  589 591 594 597 599  9 144 8 839 8 534 8 230 7 925 
25 000 24 000 23 000 22 000 21 000  - 34.5 - 32.5 - 30.6 - 28.6 - 26.6  376 393 410 428 446  5.45 5.70 5.95 6.21 6.47  11.10 11.60 12.11 12.64 13.18  0.3711 0.3876 0.4046 0.4223 0.4406  0.4481 0.4642 0.4806 0.4976 0.5150  602 604 607 609 611  7 620 7 315 7 010 6 706 6 401 
20 000 19 000 18 000 17 000 16 000  - 24.6 - 22.6 - 20.7 - 18.7 - 16.7  466 485 506 527 549  6.75 7.04 7.34 7.65 7.97  13.75 14.34 14.94 15.57 16.22  0.4595 0.4791 0.4994 0.5203 0.5420  0.5328 0.5511 0.5699 0.5892 0.6090  614 616 619 621 624  6 096 5 791 5 406 5 182 4 877 
15 000 14 000 13 000 12 000 11 000  - 14.7 - 12.7 - 10.8 -8.8 -6.8  572 595 619 644 670  8.29 8.63 8.99 9.35 9.72  16.89 17.58 18.29 19.03 19.79  0.5643 0.5875 0.6113 0.6360 0.6614  0.6292 0.6500 0.6713 0.6932 0.7156  626 628 631 633 636  4 572 4 267 3 962 3 658 3 353 
10 000 9 000 8 000 7 000 6 000  -4.8 -2.8 -0.8 + 1.1 + 3.1  697 724 753 782 812  10.10 10.51 10.92 11.34 11.78  20.58 21.39 22.22 23.09 23.98  0.6877 0.7148 0.7428 0.7716 0.8014  0.7385 0.7620 0.7860 0.8106 0.8359  638 640 643 645 647  3 048 2 743 2 438 2 134 1 829 
5 000 4 000 3 000 2 000 1 000  + 5.1 + 7.1 + 9.1 + 11.0 + 13.0  843 875 908 942 977  12.23 12.69 13.17 13.67 14.17  24.90 25.84 26.82 27.82 28.86  0.8320 0.8637 0.8962 0.9298 0.9644  0.8617 0.8881 0.9151 0.9428 0.9711  650 652 654 656 659  1 524 1 219 914 610 305 
0  + 15.0  1013  14.70  29.92  1.0000  1.0000  661  0 
- 1 000  + 17.0  1050  15.23  31.02  1.0366  1.0295  664  - 305 

Table A2: International Standard Atmosphere (ISA)

2. ALTIMETRY PRINCIPLES
2.1. General
An altimeter (Figure A4) is a manometer, which is calibrated following standard pressure and temperature laws. The ambient atmospheric pressure is the only input parameter used by the altimeter.
PA
PRESSURE ALTITUDE
PA amb PA set
P (hPa)

Figure A3: Ambient Pressure and Pressure Setting Figure A4: Altimeter Function on PFD
Assuming the conditions are standard, the “Indicated Altitude” (IA) is the vertical distance between the following two pressure surfaces (Figure A3):
.
The pressure surface at which the ambient pressure is measured (actual aircraft’s location), and

.
The reference pressure surface, corresponding to the pressure selected by the pilot through the altimeter’s pressure setting knob.
　
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