12ftYellowtail 400pxThe Yellowtail was originally known as the Metters "M" windmill. This was developed in the late 1950's from the older "K" and "Nu-Oil" models that Metters had made since the early twentieth century. The Yellowtail was also known as the MBP model "M", but was renamed in the early 1980's with a name which reflected what it was popularly called. The Yellowtail has now been in production for more than forty years.

The Yellowtail features :-

  • "StormProof" - The simple govering system automatically protects the Windmill and tower in high winds
  • Safety ladder - A turntable inspection ladder is fitted to the 10-14ft models that rotates 360º with the Windmill
  • Rugged Windwheel - The Yellowtail features a tension Windwheel that turns in the lightest breeze, yet is rugged enough to withstand gale force winds
  • "A" Frame Wheel arms - Strong one piece "A" frame wheel arms are easier to assemble, hold more securely to the hub and hold the Windwheel section rigidly in place.
  • Built in Sails - The galvanised steel sails are laced into the tension Windwheel and are spaced, shaped and curved for maximum pumping efficiency over a wide range of wind speeds.
  • Twin Pinions - Carbide gear teeth ensure long-life, and pinions will not loosen or allow the large gears to work out of alignment.
  • Double geared - with in-built speed control and manual shut-off.
  • Long Life Replaceable Bearings - The main casting of the gearbox is line bored and fitted with long-lasting replaceable bearings
  • Self maintenance - Automatic lubrication for all moving parts ensures long life and low maintenance. 

The Yellowtail is designed and built to last.

The Wheel Arms, or Spokes, are built as a one piece "A" frame to make assembly easier, and to give  a more rigid structure to the Windwheel. Sails on the Windwheel are built around the outer ring to ensure they will not work loose. The entire Windwheel bolts together under tension to create a tight structure that will withstand gale force winds.

The Yellowtail is available in 5 Windwheel sizes:

  • 6ft (1.8 metres)
  • 8ft (2.4 metres)
  • 10ft (3.0 metres)
  • 12ft (3.6 metres)
  • 14ft (4.2 metres)


Yellowtail Windmill - Pumping Performance
(based on 10 hours of wind per day)

Pump Size

Inches

2"

2.1/4"

2.1/2"

2.3/4"

3"

3.1/2"

4"

Millimetres

50.8mm

56.3mm

63.5mm

69.8mm

76.2mm

88.9mm

101.6mm

6 ft (1.8 Mtr)

Feet

71

61

49

40

34

28

25

 

Metres

22

19

15

12

10

9

8

 

Avg Gallons per day

1100

1530

1750

2110

2475

3410

4400

 

Avg Litres per day

6000

7000

7950

9590

11250

15500

20000

8ft (2.4 Mtr)

Feet

127

102

86

72

62

44

35

 

Metres

39

31

26

22

19

13

11

 

Avg Gallons per day

1320

1860

2090

2540

2970

4125

5280

 

Avg Litres per day

6000

8456

9500

11550

13500

18750

24000

10ft (3.0 Mtr)

Feet

265

233

206

161

139

99

73

 

Metres

81

71

63

49

42

30

22

 

Avg Gallons per day

1540

2145

2420

2970

3465

4785

6160

 

Avg Litres per day

7000

9750

11000

13500

15750

21750

28000

12ft (3.6 Mtr)

Feet

292

255

233

199

169

139

112

 

Metres

89

78

71

61

52

42

34

 

Avg Gallons per day

1650

2287

2585

3180

3700

5115

6500

 

Avg Litres per day

7500

10400

11750

14450

16820

23250

29550

14ft (4.2 Mtr)

Feet

385

314

282

245

201

169

134

 

Metres

117

96

86

75

61

52

41

 

Avg Gallons per day

1705

2385

2668

3285

3823

5280

6820

 

Avg Litres per day

7750

10840

12130

14934

17380

24000

31000

Flow Rates for Yellowtail Windmills

Expressed in Litres per Minute

Size

Strokes

Per Minute

2”

2¼”

2½”

2¾”

3”

3½”

4”

6ft

34

8.48

10.64

14.33

16.62

19.08

27.47

33.91

8ft

32

9.99

12.53

16.88

19.58

22.48

32.37

39.96

10ft

26

9.55

11.98

16.13

18.71

21.48

30.93

38.19

12ft

23

8.45

10.59

14.27

16.55

19.00

27.36

33.78

14ft

20

7.23

9.06

12.21

14.16

16.26

23.41

28.90

The above table shows the flow rates for each size windmill for the different pump sizes shown. The flow rate is in Litres per Minute and is based on a wind speed of 7 Metres per second.

For more information about the Yellowtail:

Download the brochure - click here