Uses and Maintenance
Wind driven pumps can be used to pump water from shallow or deep
bores into tanks, dams or irrigation channels.
They can be used to pump from rivers, dams, channels, swamps or
from tank to tank.
They are used mainly in Australia for pumping stock water, domestic
water and small irrigation systems. Swamp drainage is a common use
in some areas.
Because of their relatively low hourly output it is usually necessary
to pump into some type of storage - such as a tank or dam.
Because of the number of variables in windmill operation it is difficult
to tabulate with any real accuracy, performance figures.
The tables shown under each of the Varcoe windmill models show the
theoretical quantities of water pumped by windmills using standard
available pumps at 30 and 120 strokes per minute. An allowance of
10% should be made for pump efficiencey, depth of bore and other
MAINTENANCE OF A VARCOE MILL:
These mills require very little regular maintenance and this can
be carried out with the minimum of equipment - e.g. hammer, pipe
wrench, shifting spanner. Oil level should be checked at six monthly
intervals, but this will be found to very seldom need adjustment.
Top up or refill with SAE90 Gear Oil. The mill should be greased
at the same time, or more often in coastal areas.
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The Varcoe mill to suit your application can be chosen from the
Direct Drive Oil Bath and Junior in 6 and 7 ft.
Geared drive in 6, 7, 8 and 10ft
Towers 15ft (4.6Mt) high to any height in 5ft (1.5Mt) increments.
All heads and towers are interchangeable to give a large number
Adaptor fittings are available to allow Varcoe heads to be fitted
to almost any other make of existing tower.
All towers are of four post design giving plenty of room at the
pump head. Good access is provided to the head for maintenance and
inspection. All parts are heavily galvanized angle iron. The design
of the tower makes the Varcoe mill very easy to erect with the minimum
The Varcoe 6, 7 and 8ft fans are assembled onto a fully welded and
galvanised steel frame giving it rigidity and very good balance.
The fan is bolted to the shaft by means of a spigoted flange making
assembly easy and accurate, and the fan can not work loose on the
shaft as the boss is shrunk on.
The fan for the 10ft model is modular, comprising six segments,
bolted to the shaft by means of a spigoted flange, making assembly
easy and accurate.
GOVERNING AND CONTROL:
The well designed turntable and large tail provide very sensitive
control, ensuring that the mill faces into the wind even in very
The 'In and Out' gear mechanism is very light, smooth and efficient,
making control easy, either by hand or float. No chains are used.
The mill and fan is so designed that its self-governing characteristics
give the mill excellent protection even in very high winds.