Abstract: In a turbofan jet engine installation including a low pressure area (48) located between a primary exhaust nozzle (20) and strut fairings (30), an improvement including a fencing assembly (66) for reducing interaction of fan air (52) with air in the low pressure area. The fencing assembly (66) includes two pairs (70), (72) of opposed flow control fences (68) connected to the primary exhaust nozzle (20) at locations laterally outboard of the strut fairings (30). A first pair (70) includes fences formed of a single piece connected directly to the primary nozzle (20). A second pair (72) includes fences formed of a number of longitudinally spaced-apart segments (82). The segments (82) are connected to one face of an elongated attachment strap (84) with the opposite strap face being connected to the nozzle. Each fence includes a foot portion (78) and an upright portion (80) extending outwardly from the foot portion.

Abstract: A self-supporting hand-held grinding device (10) for beveling the edges of a part having a compound contoured surface includes a frame (12) having a flat triangular-shaped base (22) and an integrally formed arm (24) with a cylindrical flange (26) projecting from the arm (24) to which is attached a grinding tool (14). The longitudinal axis of the cylindrical flange (26) is oriented such that the longitudinal axis X of the grinding tool (14) tilts away from the longitudinal axis (W) of the base (22) by an angle, .alpha., lying in the range of 5.degree. to 8.degree., and preferably at 7.5.degree.. Three legs (46) are attached to the base (22) by a retaining nut (58) and are adjusted in height by backing off a knurled locking nut (60) and turning the shaft by means of an adjusting nut (68). A foot (48) having a socket (52) is pivotally mounted to the ball-shaped supporting end (50) of each leg (46 ).