초록 ▼

A box-structure airfoil is constructed of a composite material uppers skin, a composite material lower a skin 12 and a spar. Ribs and an elongate projection are formed integrally on the inner surface of each of the two skins. The upper and lower skins and the spar are simultaneously bonded by an adh

A box-structure airfoil is constructed of a composite material uppers skin, a composite material lower a skin 12 and a spar. Ribs and an elongate projection are formed integrally on the inner surface of each of the two skins. The upper and lower skins and the spar are simultaneously bonded by an adhesive to form a single structure. Since the ribs and the elongate projection are one-piece formed with each skin, it is possible to reduce the number of principal constituent components. Furthermore, since assembly operation is made by using the adhesive, there is no need for fasteners or the like for assembling. Moreover, the flanges on both sides of the spar can also be bonded to the respective skins. According to the invention, it is possible to reduce the number of principal constituent components and that of assembling components of an airfoil, thereby achieving its cost reduction.

대표청구항 ▼

A box-structure airfoil is constructed of a composite material uppers skin, a composite material lower a skin 12 and a spar. Ribs and an elongate projection are formed integrally on the inner surface of each of the two skins. The upper and lower skins and the spar are simultaneously bonded by an adh

A box-structure airfoil is constructed of a composite material uppers skin, a composite material lower a skin 12 and a spar. Ribs and an elongate projection are formed integrally on the inner surface of each of the two skins. The upper and lower skins and the spar are simultaneously bonded by an adhesive to form a single structure. Since the ribs and the elongate projection are one-piece formed with each skin, it is possible to reduce the number of principal constituent components. Furthermore, since assembly operation is made by using the adhesive, there is no need for fasteners or the like for assembling. Moreover, the flanges on both sides of the spar can also be bonded to the respective skins. According to the invention, it is possible to reduce the number of principal constituent components and that of assembling components of an airfoil, thereby achieving its cost reduction. certain thickness; (h) applying a thin layer of finely ground rubber to cover the surface of the urethane solution; (i) remove substantially all loose and unbonded ground rubber; (j) apply two coats of aromatic urethane sealer. 4. The method of claim 3 wherein the tri-sodium phosphate (TSP) solution has a 1 to 1 TSP to water ratio. 5. The method of claim 3 wherein the epoxy primer has a 2 to 1 resin (Part A) to cure (Part B) ratio. 6. The method of claim 3 wherein the epoxy components are mixed for a period of two minutes. 7. The method of claim 3 wherein the rubber mats are placed over the wet epoxy at a distance between 1/4" and 1/2" to the next rubber mat. 8. The method of claim 3 wherein the thickness of the applied bead of caulk is the same thickness as the mats. 9. The method of claim 3 wherein the elastomeric urethane solution sand mixture is comprised of 1 gallon of solvent free elastomeric urethane solution and 1 quart of water, mixed throughly with a mixing paddle on a drill, to an equal amount of sand. 10. The method of making the sand mixture in claim 9 wherein the mixture is to set for 5 minutes, or until it reaches a thickened state. 11. The method of applying the elastomeric urethane solution mixture in claim 3 whereby the elastomeric urethane solution mixture is poured out around the outer edges of the mats and coved at an angle to the edge of the mat. 12. The method of applying the elastomeric urethane solution mixture in claim 3 whereby the elastomeric urethane solution mixture is poured out into and filling the gaps between the mats. 13. The method of applying the encapsulating SUNFLEX coat in claim with either a 1/4" serrated squeegee or a 1/4" serrated trowel over the mats to a settling level of 1/16" to 1/8" in thickness. 14. The method of applying the encapsulating elastomeric urethane coat in claim 3 wherein while the surface areas are still wet broadcast the ground rubber to excess over the entire area. 15. The method of applying two coats of aromatic Urethane Sealer in claim 3 wherein the second coat can be rolled when the first is dry to the touch.