Environmental Engineering Reference
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Figure 3-11. Different Mod-0 conigu-
rations during a decade of research.
(a)
1979:
Upwind rotor, steel spar blades,
partial-span pitch, teetered hub, and a
spring base; simulated the “soft” second-
generation Mod-2 HAWT. (b)
1982:
Shell
tower, lap control, inboard blade sections
of laminated wood. (c)
1985:
One-bladed,
teetered rotor with tip control. (
Courtesy
of NASA Lewis Research Center
)
Figure 3-12. Mod-0 teetered hub.
(
Cour-
tesy of NASA Lewis Research Center
)
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