© 1970 - 2008 Iron Man Windmill Co.LTD

Diameter Of
Pump Cylinder

Amount Pumped Pr HourLiters

Elevation in Water Can be Raised in FEET - METERS

Diameter of Wind Wheel

Inch

mm

6ft

8ft  - 16ft

6ft
1.8M

8ft
2.4M

10ft
3.0M

12ft
3.6M

14ft
4.2M

16ft
4.8M

1 3/4

45

397

568

130 - 40

184 - 56

279 - 85

419 -128

600 -183

999 -305

1 7/8

48

473

681

120 - 37

174 - 53

259 - 79

390 -119

561 -171

918 -280

2

50

530

719

95 - 29

141 - 43

216 - 66

321 - 98

459 -140

751 -229

2 1/4

60

681

984

75 - 23

112 - 34

171 - 52

249 - 76

360 -110

590 -180

2 1/2

63

852

1230

65 - 20

95 - 29

141 - 43

210 - 64

298 - 91

488 -149

2 3/4

70

1022

1457

55 - 17

79 - 24

120 - 37

180 - 55

259 - 79

426 -130

3

75

1211

1779

46 - 14

69 - 21

98 - 30

154 - 47

220 - 67

360 -110

3 1/4

80

1420

2082

40 - 12

55 - 17

89 - 27

130 - 40

184 - 56

305 - 93

3 1/2

90

1666

2423

36 - 11

49 - 15

75 - 23

113 - 35

161 - 49

265 - 81

3 3/4

95

1893

2763

30 - 9

43 - 13

65 - 20

98 - 30

144 - 44

230 - 70

4

100

2158

3142

26 - 8

40 - 12

59 - 18

85 - 26

125 - 38

200 - 61

4 1/4

108

2423

3558

23 - 7

33 - 10

52 - 16

75 - 23

112 - 34

180 - 55

4 1/2

115

2744

3975

20 - 6

30 - 9

46 - 14

69 - 21

98 - 30

161 - 49

4 3/4

120

3028

4429

16 - 5

26 - 8

40 - 12

62 - 19

89 - 27

141 - 43

5

130

3407

4921

16 - 5

26 - 8

36 - 11

55 - 17

79 - 24

130 - 40

5 3/4

146

4429

6435

13 - 4

16 - 5

26 - 8

40 - 12

59 - 18

98 - 30

6

150

4883

7098

10 - 3

16 - 5

26 - 8

40 - 12

55 - 17

85 - 26

7

180

6624

9653

7 - 2

13 - 4

20 - 6

30 - 9

40 - 12

65 - 20

8

200

8669

12492

7 – 2

10 - 3

13 - 4

23 - 7

30 - 9

49 - 15

Average Working Pump Rod Load

 130lb 60kg 

 200lb 90kg 

 310lb 140kg 

 440lb 200kg 

 660lb 300kg 

 990lb 450kg 

The above table shows the approximate quantity of water delivered per hour by the IRON MAN WINDMILLS from 6ft (1.8M) diameter to 16ft (4.8M) diameter when running steadily in winds of 15mph (24kph) to 18mph (28kph.) Output will increase considerably from the values shown in stronger winds up to the wind speed where the maximum number of strokes per minute and the maximum pumping capacity is reached at about 30mph (48kph), as the regulating spring is adjusted. When cylinder size shown is used, windmill should start pumping in about 3mph (5kph) to 5mph (8kph) wind speeds. To get the average daily or monthly capacity, multiply the hourly capacity by the number of hours of light, fair or strong winds as are common at your location.

Description of wind speeds: 0.5 mph to 6 mph (1 kph to 10 kph) - just perceptible, Light Winds are 6 mph to 10 mph (11 kph to 16 kph) and will cause movement of leaves, small branches and is felt lightly on the face. Fair winds are 10 mph to 16 mph (17 kph to 27 kph) and will move tree branches, raise dust and blow litter on the ground. Strong winds are 17 mph to 23 mph (28 kph to 38 kph) and will cause small trees to sway. In winds over 30 mph (48 kph), the automatic regulation system will begin turning the wind wheel out of the wind and thus control speed and protect the windmill in storms.

The Iron Man windmill is normally run on the long stroke. The capacities shown in the table are based on using the long stroke of the windmill.  When the short stroke is used, the capacity is reduced by about 25% but the ability to lift water to a higher elevation is increased 33%. We do not recommend using a windmill on the short stroke except when it is found that a cylinder too large to allow pumping in the prevailing wind conditions has been installed.

Elevation
Feet - Meters

LIGHT WINDS

FAIR WINDS

STRONG WINDS

Cylinder Diameter Inches - MM

Water Pumped
per Hour
Gallons - Cu M

Cylinder Diameter
Inches - MM

Water Pumped
per Hour
Gallons - Cu M

Cylinder Diameter
Inches - MM

Water Pumped
per Hour
Gallons - Cu M

10 - 3

16 - 400

7470 - 28.3

18 - 460

13860 - 52.5

18 - 460

18900 - 71.6

16 - 5

14 - 350

5700 - 21.6

16 - 400

10960 - 41.5

16 - 400

14915 - 56.5

23 - 7

12 - 300

4200 - 15.9

14 - 350

8370 - 31.7

14 - 350

11432 - 43.3

33 - 10

10 - 250

2900 - 11

12 - 300

6150 - 23.3

14 - 350

11432 - 43.3

50 - 15

8 - 200

1875 - 7.1

10 - 250

4277 - 16.2

12 - 300

8236 - 31.8

66 - 20

7 - 180

1505 - 5.7

8 - 200

2745 - 10.4

10 - 250

5834 - 22.1

100 - 30

6 - 150

1055 - 4

7 - 180

2218 - 8.4

8 - 200

3722 - 14.1

130 - 40

5 - 130

790 - 3

6 - 150

1530 - 5.8

7 - 180

3088 - 11.5

165 - 50

4 3/4 - 120

660 - 2.5

5 - 130

1162 - 4.4

6 - 150

2112 - 8

200 - 60

4 3/4 - 120

660 - 2.5

4 3/4 - 120

978 - 3.7

6 - 150

2112 - 8

260 - 80

4 1/4 - 110

555 - 2.1

4 3/4 - 120

978 - 3.7

4 3/4 - 120

1346 - 5.1

330 - 100

3 3/4 - 100

475 - 1.8

4 1/4 - 110

818 - 3.1

4 3/4 - 120

1346 - 5.1

410 - 125

3 1/4 - 80

290 - 1.1

3 3/4 - 100

686 - 2.6

4 1/4 - 110

1135 - 4.3

490 - 150

3 1/4 - 80

290 - 1.1

3 1/4 - 80

450 - 1.7

3 3/4 - 100

925 - 3.5

575 - 175

2 3/4 - 70

238 - 0.9

3 1/4 - 80

450 - 1.7

3 1/4 - 80

608 - 2.3

655 - 200

2 3/4 - 70

238 - 0.9

2 3/4 - 70

345 - 1.3

3 1/4 - 80

608 - 2.3

820 - 250

2 1/4 - 60

158 - 0.6

2 3/4 - 70

345 - 1.3

2 3/4 - 70

450 - 1.7

985 - 300

2 1/4 - 60

158 - 0.6

2 1/4 - 60

238 - 0.9

2 3/4 - 70

450 - 1.7

1150 - 350

1 7/8 - 50

105 - 0.4

2 1/4 - 60

238 - 0.9

2 1/4 - 60

345 - 1.3

1300 - 400

1 7/8 - 50

105 - 0.4

1 7/8 - 50

158 - 0.6

2 1/4 - 60

345 - 1.3

The amount of water pumped by a windmill depends on the strength of the usual wind and the exposure to the wind. The wind wheel of the IRON MAN 20ft (6M) windmill should stand at least 25ft (7.5M) above all surrounding obstructions, like trees or buildings, within a 200ft 60M radius so that good wind can get to it. In locations where light winds are common, it is recommended to use a cylinder one size smaller than shown in the chart above. This will load the windmill lightly so that it will run easily in light winds. Where strong winds blow a sufficient amount of the time, a pump cylinder one size larger can be used to pump more water.

The above table shows the approximate quantity of water delivered per hour by the 20ft (6m) IRON MAN WINDMILL when running steadily in the kind of winds indicated.  To get the average daily or monthly capacity, multiply the hourly capacity by the number of hours of light, fair or strong winds as are common at your location. When Loaded according to the table, the 6m windmill will reach its maximum pumping capacity in winds blowing steadily from about 22 mph to 25 mph 30k to 32kph or more. The 6m windmill is self regulated to a maximum speed of about 15 strokes per minuet.

Description of wind speeds: 1k to 10kph - just perceptible, Light Winds are 11k to 16kph and will cause movement of leaves, small branches and is felt lightly on the face. Fair winds are 17kph to 27kph and will move tree branches, raise dust and blow litter on the ground. Strong winds are 28kph to 38kph and will cause small trees to sway. In winds over 38kph. The automatic regulation system will begin turning the wind wheel out of the wind and thus control speed and protect the windmill in storms.

The 6m windmill is normally run on the long stroke of 0.5m. The capacities shown in the table are based on using the long stroke of the windmill. When the short stroke is used, the capacity is reduced by about 25% but the ability to lift water to a higher elevation is increased proportionately. We do not recommend using a windmill on the short stroke of 0.4m except when it is found that a cylinder too large to allow pumping in the prevailing wind conditions has been installed.