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AIR 403 Land Manual Document #0049 REV D
SOUTHWEST WINDPOWER 8/20/2001 35
11. TOWERS
There are a few things to consider when choosing the correct tower for your turbine, site and
budget. The following is a list of considerations:
- Site: trees, hills, buildings
- Tower budget
- Space for tower; guyed, freestanding, rooftop
- Number of turbines to be installed
- Ease of use
It is important to mount the turbine in the best winds while being balanced by the cost and
effort of the installation. As a rule, the higher the tower is erected, the greater the output.
However, the taller tower also involves greater tower cost and effort. If purchasing a taller
tower will provide significantly more power it might offset the additional cost and effort.
The AIR 403 is designed to be mounted on tubing or pipe 1.875 inch (48mm) outside
diameter. This is equivalent to 1 ½ inch SCH 40 pipe, which can be used in some tower
applications. If larger pipe or tubing is used for part of your tower, make sure that the 1.875
inch pipe that the turbine is mounted to is at least 26” long. Larger pipes will reduce the
blade tip clearance and may cause damage to the blades. Refer to Figure 6 on page 16.
CAUTION: PROPER ENGINEERING, SAFETY CONSIDERATIONS AND LOCAL
CODES SHOULD BE ADDRESSED BEFORE ATTEMPTING ANY INSTALLATION.
NOTE: The yaw wires can support loads up to a total of 150 lbs. (68 kg) in wire weight. For
higher wire weights, you must install a strain relief to minimize the stress put on the hanging
wires.
NOTE: No more than 8 feet (2.5 m) of pipe should extend from the last support.
NOTE: Towers should be capable of withstanding 150 lb. (68 kg) of load in the horizontal
direction at the turbine.
11.1 Guyed Towers
Guyed and freestanding towers are the most common way to install a wind generator. These
towers are available in all shapes, sizes and costs. As with all towers, you must first evaluate
your site to determine the appropriate tower height, available space and reasonable cost.
11.2 Roof Top
One of the revolutionary features of the AIR 403 is its modular design. This allows for the
use of multiple turbines to achieve the desired power production. Roof top mounts offer
relatively easy multiple turbine installations if the site allows.
