50

51

53

52

55

56

54

57

58

59

60

61

62

64

63

65

67

66

69

68

71

72

70

73

74

75

76

79

77

78

81

80

83

82

85

84

86

87

88

89

90

91

92

93

95

94

96

97

99

98

01

00

02

03

04

05

06

07

09

08

11

10

13

12

15

14

17

16

18

19

20

21

22

23

24

H-II (H-II, H-IIS, H-IIA, H-2B)      -     Vehicle use: Satellite, HTV on H-IIB

Japanese orbital launch vehicle. The original H-II version was cancelled after failures and replaced by the redesigned H-IIA, which launches commercial satellites to orbit, and H-IIB, which launches the H-II Transfer Vehicle (HTV) Kounutori that carries cargo to the ISS. H-II vehicles are two-stage rockets which use liquid oxygen and liquid hydrogen as propellant and strap-on solid rocket boosters (SRBs) powered by polibutadiene. H-IIA uses one engine for the first stage and two strap-on SRBs, while H-IIB uses two engines in the first stage and four strap-on SRBs.

source: http://global.jaxa.jp/projects/rockets/

 

 

 

Variant

All variants

H-II

H-IIS

H-IIA

H-IIB

 

Launches

59

6

1

43

9

 

Failures

3

1

1

1

0

 

Realized

0.95

0.83

0.00

0.98

1.00

 

Predicted

0.93

0.75

0.33

0.96

0.91

 

0.83

0.75

0.83

0.80

0.82

0.77

0.86

0.83

0.71

0.67

0.85

0.82

0.77

0.73

1.00

0.75

0.75

0.70

0.71

0.67

0.79

0.75

0.77

0.73

1.00

0.83

1.00

0.80

0.94

0.92

0.95

0.93

0.94

0.93

 

0.94

0.93

 

0.91

0.89

0.93

0.91

0.90

0.87

0.94

0.92

0.90

0.88

0.93

0.91

0.88

0.86

0.88

0.85

1.00

0.86

Realized Rate

Predicted Rate