Abstract: An aircraft propulsion system includes four engines with pusher propellers. The engines are mounted in pairs on the wings of the aircraft and the respective directions of rotation thereof, when viewing the engines from the rear of the aircraft from left to right, are: (1) the clockwise direction, (2) the counterclockwise direction, (3) the clockwise direction, and (4) the counterclockwise direction.

Abstract: An apparatus for temporarily holding a button on a garment to replace a button which has been detached or lost from the garment. The apparatus includes a spring-like U-shaped clip that has an upper planar portion and a lower planar portion. The upper and lower planar portions are connected at their rear ends so that the front ends of the planar portions are resiliently moveable between a normal closed position in which the front ends of the planar members abut to an open position in which the front ends are separated. The front ends of the upper and lower planar members are biased toward each other in the closed position. The upper surface of the upper planar member is provided with a retainer for being connected to a button. More specifically, the upper the retainer with a retaining element having a receptive socket receiving a second retaining element.

Abstract: The present invention consists of an apparatus for temporarily holding a button on a garment to replace a button which has been detached or lost from the garment. The apparatus includes a spring-like U-shaped clip that has an upper planar portion and a lower planar portion. The upper and lower planar portions are connected at their rear ends so that the front ends of the planar portions are resiliently moveable between a normal closed position in which the front ends of the planar members abut to an open position in which the front ends are separated. The front ends of the upper and lower planar members are biased toward each other in the closed position. The upper surface of the upper planar member is provided with a retainer for being connected to a button. More specifically, the upper the retainer with a retaining element having a receptive socket receiving a second retaining element.