Rocket Engines

Contemplating the expansion ratio and mach number of miscellaneous high-expansion rocket engines. The mach number is from Figure 3.1 on page 39, assuming a specific heat ratio of 1.3:

|| || ratio || mach ||

Saturn V first stage F1

16.1

4.01

Saturn V 2nd/3rd J2

27.5

4.50

Apollo SM AJ10-137

62.5

5.31

Shuttle SSME RS-25

77.5

5.53

SpaceX Merlin Vacuum 1C

14.5

3.91

SpaceX Merlin Vacuum 1D

165.1

6.36

|| Laser Ablation Thrust || 2.95 || 2.50 ||