Aircraft Propulsion, 2nd Edition

APPENDIX A U.S. Standard Atmosphere

U.S. Standard Atmosphere U.S. Units

In this table alt is altitude in thousands of feet.

sigma is density divided by sea-level density.

delta is pressure divided by sea-level pressure.

theta is temperature divided by sea-level temperature.

temp is temperature in degrees Rankine.

press is pressure in pounds per square foot.

dens is density in slugs per cubic foot.

a is the speed of sound in feet per second.

visc is viscosity in 10⁻⁶ slugs per foot-second.

k.visc is kinematic viscosity in 10⁻⁶ square feet per second.

ratio is speed of sound divided by kinematic viscosity times 10⁶.

Sea-level density = 0.0023769 slugs per cubic foot

Sea-level temperature = 518.7 degree Rankine

Sea-level pressure = 2116.2 pounds per square foot

alt	sigma	delta	theta	temp	press	dens	a	visc	k.visc	ratio
−1	1.0296	1.0367	1.0069	522.2	2193.8	0.0024472	1120.3	0.376	1.54E–4	7.30
0	1.0000	1.0000	1.0000	518.7	2116.2	0.0023769	1116.5	0.374	1.57E–4	7.10
1	0.9711	0.9644	0.9931	515.1	2040.9	0.0023081	1112.6	0.372	1.61E–4	6.91
2	0.9428	0.9298	0.9863	511.5	1967.7	0.0022409	1108.7	0.370	1.65E–4	6.72
3	0.9151	0.8963	0.9794	508.0	1896.7	0.0021752	1104.9	0.368	1.69E–4	6.54
4	0.8881	0.8637	0.9725	504.4	1827.7	0.0021109	1101.0	0.366	1.73E–4	6.36
5	0.8617	0.8321	0.9656	500.8	1760.9	0.0020482	1097.1	0.364	1.78E–4	6.18
6	0.8359	0.8014	0.9588	497.3	1696.0	0.0019869	1093.2	0.362	1.82E–4	6.01
7	0.8107	0.7717	0.9519	493.7	1633.1	0.0019270	1089.3