STRAIN REDUCED AIRPLANE SKIN

摘要

An aircraft body member (10) has the space between the bulkheads (12) on the interior of the aircraft (10) filled with a polyisocyanurate solid closed cell foam material (20). The foam (20) is applied so that it adheres to both the inside of the aluminium skin (16) of the fuselage and the facing sides (24) of the bulkheads (12). The foam (20) may be applied by either spraying (Figure 6) or by pouring (Figure 5) the resin with appropriate catalyst materials to cause the resin to form the foam (20). The foam (20) acts to significantly strengthen the aircraft (10) structure and thereby increase the time of usage of aging aircraft (10) before the catastrophic failure of the adherence of the skin (16) to the bulkheads (12).