67aises humpback, wind turbine .

Wing one of six, with detail views of tip .

External surface .

_

This model is based on code from the 57es revision #5 helicopter rotor, (posted 14 August 2010), and the 57aises wind turbine, (posted 19 July 2010) ;

adapting it as a six winged turbine designed to sync with the wind when its tips are traveling at about 7.3 times the wind's speed .

_

Like the 57es, it applies a compound cross-section formula which renders a heavier trailing edge than a single mathematical statement would produce .

As the needs of a wind turbine are more oriented toward efficiency than toward the mission-critical durability of a rotor,

the formula is rewritten to add only a very small amount of material to the trailing edge, (seen at the tip) ;

but this should make it more resistant to such impacts as large hail .

The wing's humpback, most visible near the base, is a consequence of this method .

I rather like it, as it reminds me of the whale of the same name ;

and believe that it may improve efficiency near the base by bring the over and under airstreams together more cleanly .

_

The foundation constant chosen for the serration in this model is small, yielding sharp, curved leading teeth and long trailing ones .

This can be changed, and testing could determine which profile works best .

_

The design consensus is that three-winged turbines are most efficient and cost-effective ; and this may be true .

I feel that serration can allow six wings to turn from the same hub while minimizing their aerodynamic interference with themselves and with eachother .

Yet it may be that this design attempts to overharvest the wind,

and will cause enough air to flow around, (rather than through), that the turbine would be as productive with fewer wings .

If that is true here, it may also be true for the 57aises .

Still, i would like the models to be tried, as i find six and five point symmetries more natural in appearance .

_

I feel that the unbalanced-load-wear associated with even-wing-count turbines can be minimized by using a large driveshaft and innovative tower design .