Rocket Thrust Coefficient Tables (Gamma = 1.2)


e Expansion area ratio
Me: Mach number at exit plane
pe/pc: Ratio of pressure at exit plane to chamber pressure
Cf-opt: Thrust coefficient assuming optimal expansion
Cfv: Vaccuum thrust coefficient

epsilon Me pe/pc Cf-opt Cfv

1.0 1.000 0.5643080 0.67753 1.24184

2.0 2.055 0.1207748 1.22420 1.46575

3.0 2.397 0.0656052 1.35714 1.55396

4.0 2.619 0.0435133 1.43312 1.60717

5.0 2.785 0.0319051 1.48482 1.64435

6.0 2.917 0.0248603 1.52331 1.67247

7.0 3.027 0.0201796 1.55359 1.69485

8.0 3.122 0.0168690 1.57833 1.71328

9.0 3.205 0.0144174 1.59911 1.72887

10.0 3.278 0.0125373 1.61693 1.74231

11.0 3.345 0.0110547 1.63247 1.75408

12.0 3.405 0.0098591 1.64620 1.76451

13.0 3.461 0.0088767 1.65847 1.77386

14.0 3.512 0.0080569 1.66952 1.78232

15.0 3.560 0.0073636 1.67957 1.79002

16.0 3.604 0.0067703 1.68875 1.79708

17.0 3.646 0.0062577 1.69721 1.80359

18.0 3.686 0.0058107 1.70502 1.80962

19.0 3.723 0.0054180 1.71229 1.81523

20.0 3.759 0.0050705 1.71906 1.82047

epsilon Me pe/pc Cf-opt Cfv

21.0 3.792 0.0047611 1.72540 1.82538

22.0 3.824 0.0044840 1.73135 1.83000

23.0 3.855 0.0042346 1.73696 1.83436

24.0 3.885 0.0040091 1.74226 1.83848

25.0 3.913 0.0038043 1.74728 1.84238

26.0 3.940 0.0036175 1.75204 1.84609

27.0 3.966 0.0034467 1.75656 1.84962

28.0 3.991 0.0032898 1.76088 1.85299

29.0 4.016 0.0031453 1.76499 1.85621

30.0 4.039 0.0030119 1.76893 1.85928

31.0 4.062 0.0028883 1.77270 1.86223

32.0 4.084 0.0027735 1.77631 1.86506

33.0 4.105 0.0026667 1.77978 1.86778

34.0 4.126 0.0025671 1.78312 1.87040

35.0 4.146 0.0024740 1.78633 1.87292

36.0 4.166 0.0023868 1.78943 1.87535

37.0 4.185 0.0023050 1.79241 1.87770

38.0 4.204 0.0022281 1.79529 1.87996

39.0 4.222 0.0021557 1.79808 1.88215

40.0 4.239 0.0020874 1.80078 1.88427

epsilon Me pe/pc Cf-opt Cfv

41.0 4.257 0.0020230 1.80339 1.88633

42.0 4.274 0.0019620 1.80592 1.88832

43.0 4.290 0.0019043 1.80837 1.89025

44.0 4.306 0.0018495 1.81075 1.89213

45.0 4.322 0.0017976 1.81306 1.89395

46.0 4.337 0.0017482 1.81531 1.89573

47.0 4.352 0.0017012 1.81750 1.89745

48.0 4.367 0.0016564 1.81962 1.89913

49.0 4.382 0.0016137 1.82169 1.90077

50.0 4.396 0.0015730 1.82371 1.90236

52.0 4.423 0.0014968 1.82759 1.90543

54.0 4.450 0.0014271 1.83129 1.90835

56.0 4.476 0.0013630 1.83481 1.91114

58.0 4.501 0.0013039 1.83818 1.91381

60.0 4.524 0.0012493 1.84140 1.91636

62.0 4.548 0.0011987 1.84449 1.91881

64.0 4.570 0.0011517 1.84745 1.92116

66.0 4.592 0.0011079 1.85029 1.92341

68.0 4.613 0.0010670 1.85303 1.92559

70.0 4.634 0.0010288 1.85567 1.92768

epsilon Me pe/pc Cf-opt Cfv

72.0 4.654 0.0009929 1.85821 1.92971

74.0 4.674 0.0009593 1.86067 1.93166

76.0 4.693 0.0009277 1.86304 1.93354

78.0 4.711 0.0008979 1.86534 1.93537

80.0 4.729 0.0008698 1.86756 1.93714

82.0 4.747 0.0008432 1.86971 1.93885

84.0 4.764 0.0008181 1.87179 1.94051

86.0 4.781 0.0007943 1.87382 1.94212

88.0 4.798 0.0007717 1.87578 1.94369

90.0 4.814 0.0007502 1.87769 1.94521

95.0 4.853 0.0007011 1.88223 1.94884

100.0 4.890 0.0006574 1.88649 1.95223

105.0 4.925 0.0006185 1.89048 1.95542

110.0 4.959 0.0005835 1.89424 1.95842

115.0 4.992 0.0005520 1.89778 1.96126

120.0 5.023 0.0005234 1.90114 1.96395

125.0 5.052 0.0004973 1.90433 1.96650

130.0 5.081 0.0004736 1.90736 1.96892

135.0 5.109 0.0004518 1.91024 1.97123

140.0 5.136 0.0004317 1.91300 1.97344

epsilon Me pe/pc Cf-opt Cfv

145.0 5.161 0.0004133 1.91563 1.97555

150.0 5.186 0.0003962 1.91815 1.97758

155.0 5.211 0.0003803 1.92057 1.97952

160.0 5.234 0.0003655 1.92290 1.98138

165.0 5.257 0.0003518 1.92513 1.98318

170.0 5.279 0.0003390 1.92728 1.98490

175.0 5.301 0.0003270 1.92935 1.98657

180.0 5.322 0.0003157 1.93135 1.98817

185.0 5.342 0.0003051 1.93328 1.98972

190.0 5.362 0.0002952 1.93514 1.99123

200.0 5.401 0.0002769 1.93870 1.99408

210.0 5.437 0.0002607 1.94203 1.99677

220.0 5.473 0.0002460 1.94518 1.99930

230.0 5.506 0.0002328 1.94815 2.00170

240.0 5.538 0.0002208 1.95096 2.00396

250.0 5.569 0.0002099 1.95363 2.00612

260.0 5.599 0.0002000 1.95617 2.00817

270.0 5.628 0.0001908 1.95859 2.01012

280.0 5.656 0.0001824 1.96090 2.01198

290.0 5.683 0.0001747 1.96311 2.01377

epsilon Me pe/pc Cf-opt Cfv