1. Wood laminates layered with epoxy, solid wood for small rotors
2. Steel and Aluminum Alloys
Spar and Skin construction (skeleton and outer skin, aviation technology)
3. Glass Reinforced Polyester or Wood/ Epoxy
4. Synthetic composites:
Polyester or epoxy matrix reinforced with glass fibers
Resin soaked glass Strands wrapped around forms
5. Hybrid Composities
Aluminum + thin Aramid (strong heat-resistant fiber such as Kevlar) or Carbon fiber and Epoxy Layers
6. Epoxy resin in Engineered Fabric
photo: ScienceDaily
ref: M Ragheb1-5
Owens Corning Ultrablade Fabric
(WindPowerEngineering)
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