Abstract: An improved slingshot pouch with a holding means in which the pouch walls apply equal pressure across the surface of a pressure sensitive projectile. As a result of the uniform pressure on the projectile, it can be fired with confidence that it will not burst or be crushed during the process. The pouch is generally spherically shaped and is formed from a flexible and pliable material. The pouch comprises a triangular handle, a wall, end arms, ribs, and angle arms. The pouch has a smooth inside lining without flex fingers or other projections. The pouch is provided with a triangular gripping element attached in a pigtail fashion at its rearward side.

Abstract: An airfoil which has one or more laminar flow control features to enhance the aerodynamic performance of bluff body vehicles such as buses and truck-tractor trailer rigs. Theses features include a combination of curved and tapered airfoil surfaces, air ejectors or other vacuum producing devices that reduces the air drag over the moving surface. The basic form of structure is a hollow curved and tapered airfoil surface with its base mounted against the rear vehicle wall with hinges such that the airfoil can be folded back against the side of the vehicle.