Abstract: The current invention is inclusive of a decoy protection system and method of protecting jet aircraft from shoulder fired missiles comprising while such aircraft is in a flight envelope where it is susceptible to being hit by a such a missile, by employing a decoy means towed by aircraft at a distance away from the aircraft whereby the decoy means is located sufficiently remote away from any part of said aircraft that a missile strike on the decoy mean will not normally damage the aircraft, supplying said decoy means with jet fuel from said aircraft and burning said jet fuel in the decoy means to create a high intensity IR signature in the decoy means sufficient to divert shoulder fired missiles from said aircraft to said decoy means.

Abstract: A motor grader including a wheeled main frame and a drawbar structure attached thereto is disclosed wherein a circle-mounted working implement, such as a blade or the like, is supported on the drawbar by improved guide shoes. The improved guide shoes include surfaces in engagement with both upper and lower surfaces of the circle at all times and remotely controlled mechanical apparatus for varying the frictional forces exerted by such guide shoes on the circle, whereby undesirable effects due to wearing of the engaging surfaces in operation are reduced.