Abstract: A helicopter rotor system using composite flexbeams for connecting a rotor blade to the rotor hub, each flexbeam being of C-section and having a web section made up of 0.degree. and .+-.45.degree. plies and top and bottom flanges made up of low angle plies in the direction of their length with their ends being connected by an arc of plies so that the top and bottom flange plies are continuous with an attachment fitting encased at the ends of the flexbeams.

Abstract: A construction for a high speed, high DN roller bearing including an outer race 10, a split inner race 12, two rows of bearing rollers 18 and 20, the rollers having an L/D of less than 0.866, a groove guided single piece retainer cage 22 and passages 30, 32, 34, 36, 38 and 42 through which oil is provided to cool and lubricate the bearing components.

Abstract: A starting gate for motorcycle racing of the moto-cross type including a plurality of individual U-shaped members each of which can be raised to a cocked position ahead of the front wheel of a racing motorcycle, a camming device for maintaining the member in cocked position and permitting the release of the member to allow it to drop by gravity towards and out of the way of the motorcycle, and an actuator frame having an interconnection for positioning the camming device to cock the member and means for cocking and releasing the camming device, the construction permitting the addition of a number of U-shaped members extending in either direction from the actuator frame to accommodate the starting of a variable number of racing motorcycles.

Abstract: The achievement of a leak-free connection between polyethylene tubing and metal tubing by inserting the metal tube into the end of the polyethylene tube which has a plurality of radial holes adjacent its end and casting a polyurethane block about the tube assembly.

Abstract: Telescoping collective pitch stick assembly with a locking mechanism for securing extended position and permitting retraction of the stick to facilitate ingress and egress of a pilot from his seat in a helicopter. The locking mechanism has an index pin and cam arrangement having a slot with three interconnected areas.

Abstract: A tool permitting the changing or replacing of a shock absorber helical spring, the tool including a base on which a shock absorber is mounted in a position parallel to the base with one end of the shock absorber being restrained, a shock absorber length adjustment shaft is positioned on the base adjacent the other end of the shock absorber, a hand lever is positioned on the adjustment shaft with strategically located pins on the hand lever being inserted between coils of the spring, and the hand lever is then moveable to cause compression of the spring sufficiently far to enable removal of a spring retainer and thus removal of the spring.