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Terb bulls eye
- and exactly what I have been trying to figure for years now...!
The problem with the WTs are the enormous torques they must endure, particularly the start momentum ... the forces involved chew gears like kids chew gum.
So adding a 90dg angular/beveled gear would probably add to these issues - and a loss of maybe 20% ...
The larger 5MW WTs are really heavy up there, the Nacelle with components plus the 3-blades weigh 310 tons - OR the same as 310 nos of 1ton automobiles - IT all put on top of the tower ...wow.
These 5MW WTs need to be started up by a separate motor, in order to start their mission. An average tower is at some 5 million Pound Sterling - only the tower.
... and it all done on purpose at free will – peak-energy is around and we scramble for solutions – the power table submitted tells me all (!)
see the below image for the innards of a typical turbine.
This is the fellah I described above - M5000 Multibrid - How do they do this ...? I mean it is impressive stuff, but is it smart anymore - for such intermittant power. I read somewhere ( iI think Edmonton/Calgary ?- Canada) the local grid had too many WTs in their mix, rendering disruptions at low winds ... too many eggs in the same basket ... the WT basket(!)
The airbus A380 is maximum large as per overall size, had they made it larger, AND they had to alter the airports as well.... there is a limit for "stuff" -