Solutions to problems for
Aircraft Performance: An Engineering Approach, Mohammad Sadraey, 2nd ed., CRC, 2023 Chapter 1-10
Ch. 1 The software package Mathcad is used to solve problems.
1.1. Determine the temperature, pressure and air density at 5,000 m and ISA condition. There are two methods: a. Using appendix: From Appendix A: -
Temperature: 255.69 K Pressure: 54,048 Pa Air density: 0.7364 kg/m3
b. Calculations: h 5000 m
ISA
L1 6.5
K 1000 m
Sea level:
To ( 15 273) K 288K
5000 m:
T5 To L1 h 255.5K
T5 P5 Po To
5.256
54000.3 Pa
P5 kg 5 0.736 R1 T5 3 m
R1 287
(Equ 1.6)
(Equ 1.16)
(Equ 1.23)
Same results.
1
J kg K
Po 101325 Pa