Abstract: A method and device (10) for testing condoms, the device (10) comprises a perforated, elongated plastic, cylindrical member (12) having a head (14) at one end thereof, a body (16) and a base (18) at the other end thereof. Fitable into the hollow interior of cylindrical member (12) is a plunger assembly (30) with a piston (78) thereon. Perforations (20) in the body (16) of the cylindrical member (12) provide communication with a sleeve (28) in which the piston (78) rides. A condom is unrolled over cylindrical member (12) and sealed air-tight to the base (18) thereof. Pumping the piston (78) inflates the condom where it can be inspected for perforations, tears, and porosity. A flap valve (35) in the piston (78) allows air in the condom to escape through the perforations (20) and through a whistle means (42) to provide an audio signal whose pitch is a function of velocity of air through the signal and thus indicative of the porosity of the condom membrane.

Abstract: A method for joining the upper surface of a wing to its lower surface during assembly of the wing, and a novel internal wing structure. The method and structure uses multiple overlapping rib pairs. A rib is attached to the upper surface of the wing and overlaps an identical rib attached to the lower surface when the two surfaces are brought together at the leading and trailing edges. The two ribs so disposed are flush, one lying next to another with a rib spar hole in each rib matching an identical hole in the other of the pair. Wing spars are then inserted into the wing spar holes. In this manner wing spar alignment and attachment is simplified, and the upper and lower surfaces of the wings are mated.