David A. Spera · National Aeronautics and Space Administration; [for sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va.]

37 sayfa · 1969

Creep / Metals / Nimonic alloys / Testing / Thermal fatigue

Epoxy compoundsStructural properties of laminated Douglas fir/epoxy composite materialDavid A. Spera

Structural properties of laminated Douglas fir/epoxy composite material

David A. Spera · Available from National Technical Information Service

127 sayfa · 1990

Laminated wood / Testing / Douglas fir / Epoxy compounds

Wind turbinesStructural analysis of wind turbine rotors for NSF-NASA Mod-O wind power systemDavid A Spera

Structural analysis of wind turbine rotors for NSF-NASA Mod-O wind power system

David A Spera · Dept. of Energy, Division of Solar Energy

37 sayfa · 1975

Wind turbines

Wind turbinesComparison of computer codes for calculating dynamic loads in wind turbinesDavid A Spera

Comparison of computer codes for calculating dynamic loads in wind turbines

David A Spera · Dept. of Energy, Division of Solar Energy

30 sayfa · 1978

Computer programs / Wind-pressure / Wind turbines