Useful Formulae and Tables for Various Rockets

This is a table of air density versus altitude, rather important for the Balroc design. The 100,000 meter mark is, of course, the elevation required for the X-Prize. Rough estimates of the operating limits of the Balroc indicate that it might be able to "cruise" at that altitude, although it would not be at an orbital velocity.

 ALTITUDE(m)	TEMP(K)	PRESSURE RATIO	DENSITY (kg/cubic m)

 0 (sea level)	288.15		1.000			1.225
 1000		281.65		8.87x10E-1		1.112
 3000		268.65		6.69x10E-1		9.091x10E-1
 5000		255.65		5.33x10E-1		7.631x10E-1
 10,000		223.252		2.62x10E-1		4.135x10E-1
 25,000		221.552		2.52x10E-2		4.008x10E-2
 50,000		270.65		7.87x10E-4		1.027x10E-3
 75,000		206.65		2.04x10E-5		3.486x10E-5
 100,000	195.08		3.16x10E-7		5.604x10E-7
 130,000	469.27		1.23x10E-8		8.152x10E-9
 160,000	696.29		3.00x10E-9		1.233x10E-9
 200,000	845.56		8.36x10E-10		2.541x10E-10
 300,000	976.01		8.66x10E-11		1.916x10E-11
 400,000	995.83		1.43x10E-11		2.803x10E-12
 600,000	99.85		8.11x10E-13		2.137x10E-13
 1,000,000	1000.0		7.42x10E-14		3.561x10E-15