Abstract: A circumferential skin joint according to the present disclosure may comprise a first composite fuselage member having a first composite skin comprising a first chamfer at least partially defining a first distal end of the first composite fuselage member, the first chamfer defining a first tapered mating surface extending circumferentially around an outer surface of the first composite fuselage member. In some examples, the circumferential skin joint further comprises a second composite fuselage member having a second composite skin, the second composite skin comprising a second chamfer at least partially defining a second distal end of the second composite fuselage member and defining a second tapered mating surface extending circumferentially around an inner surface of the second composite fuselage member. The first tapered mating surface contacts the second tapered mating surface to form a tapered lap joint between the first composite fuselage member and the second composite fuselage member.

Abstract: An apparatus for laying and burying wire underground having a cutter unit, a tow bar affixed to the front of the cutter unit and a drag plate affixed to the rear of the cutter unit. The cutter unit includes a blade which cuts a slit in the ground into which the wire is layed as the cutter unit is moved over the ground. The drag plate contains a weight and is utilized to repack earth over the slit made by the cutter unit thereby completely burying the wire underground. Motive power for the wire laying/burying apparatus is provided by any suitable vehicle to which the tow bar is attached.