Windmill Engineering Co.

Windmill Engineering Co.

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The 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