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The retardation data, in the table below, was calculated by Programs using the 'Retardation Functions' derived from the firing tests of these two Standard Projectiles. When viewing the graph, 5, of Change of Retardation Rate over Velocity, please note that the velocity intervals are not equal. You may wish to compare the values obtained for the retardation of the British 1904-6 projectile with those in the 'Retardation of Standard Projectiles' table and on the graph, 4.

          

Retardation of Standard Projectiles, Calculated from their Retardation Functions

Velocity (fps) Retardation of Krupp Projectile - Mayevski / Ingalls' Functions W u n Retardation of British 1904-1906 Projectile- British Functions W u e
750

800

850

900

950

1000

1050

1100

1120

1150

1200

1250

1300

1400

1600

1800

2000

2200

2400

2600

2800

3000

3200

3400

3600

3800

4000

4200

4400

26.3

30.4

36.5

43.3

50.9

63.4

80.9

102.1

111.7

127.5

157.7

186.9

210.2

257.9

336.9

426.4

510.5

600.3

695.9

797.4

895.7

996.8

1101.6

1210.2

1322.3

1437.9

1556.8

1679.1

1804.7



4.1

6.1

6.8

7.6

12.5

17.5

21.2

9.6

15.8

30.2

29.2

23.3

47.7

79

89.5

84.1

89.8

95.6

101.5

98.3

101.1

104.8

108.6

112.1

115.6

118.9

122.3

125.6

29.63

32.86

36.81

43.7

51.39

59.94

71.71

96.81

108.74

128.96

164.87

186.34

209.61

261.8

350.12

432.81

523.19

603.6

687.75

775.48

877.64

984.81

1096.89

1213.75

1335.32

1461.5

1592.21

1727.38

1866.92



3.23

3.95

6.89

7.69

8.55

11.77

25.1

11.93

20.22

35.91

21.47

23.27

52.19

88.32

82.69

90.38

80.41

84.15

87.73

102.16

107.17

112.08

116.86

121.57

126.18

130.71

135.17

139.54

 

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