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6.0 Tower and Wind Turbine Generator Installation
NOTICE: Use of the material contained in this document is subject to the warning on page Iv and the disclaimer
on page v of this document.
DOC012R02 AOC 15/50 User Manual Nov 2001
44
Figure 6-7 Positioning the blade for attachment
Figure 6-8 Bolting blade to a hub
The blade pitch can be adjusted to set the peak power production and to accommodate various
wind resources. For pitch setting, consistency between blades and optimum power capture, AOC
recommends that a pitch tool be used which may be purchased from AOC. Currently a standard,
an aggressive and a conservative pitch setting tool are available. (See figure 6-9 for pitch
variance.) Custom pitch tools may also be designed for specific sites.
At this point the remaining six bolts and ten washers should be installed and the pitch tool
removed. Loctite 271 should be applied to each of the bolts strictly following the procedure
outlined in Appendix J-3. All the blade bolts should be torqued in two stages using a 15/16"
socket: first to 180 Nm (130 ft-lbs) and then to 243 Nm (180 ft-lbs). The blade bolts should be
torqued in a star pattern starting with #1 as shown in Figure 6-10. The blade washers MUST be
Blade #1
Ground level
Turbine on pallet
4 Corner Bolts