Abstract: A convertible ducted fan engine and mounting system. The convertible ducted fan engine has a shroud encircling a mechanical fan. The convertible ducted fan engine includes a fluid-propulsion configuration in which the mechanical fan rotates freely with respect to the shroud to produce thrust through fluid flow, and a drive-wheel configuration in which the shroud rotates about the rotational axis.

Abstract: A convertible ducted fan engine and mounting system. The convertible ducted fan engine has a shroud encircling a mechanical fan. The convertible ducted fan engine includes a fluid-propulsion configuration in which the mechanical fan rotates freely with respect to the shroud to produce thrust through fluid flow, and a drive-wheel configuration in which the shroud rotates about the rotational axis.

Abstract: A convertible ducted fan engine and mounting system. The convertible ducted fan engine has a shroud encircling a mechanical fan. The convertible ducted fan engine includes a fluid-propulsion configuration in which the mechanical fan rotates freely with respect to the shroud to produce thrust through fluid flow, and a drive-wheel configuration in which the shroud rotates about the rotational axis. The mounting system includes at least one gimbal ring and may include a circular track system thereby enabling the convertible engine to be oriented in any direction.

Abstract: At least one temple piece on a pair of eyeglasses configured to magnetically attach to another portion of the eyeglasses when the temple piece is folded inwards towards the lenses. The temple piece may employ an apparatus, attached thereto, having a magnet or magnetic material to temporarily mate the temple piece to a magnetically receptive portion of the eyeglasses or to the other temple piece having a similar apparatus secured thereto. The method of securing a temple piece to another portion of the eyeglasses effectively creates a closed latch for securely hanging the eyeglasses from an object. In addition, the temple piece can secure a pair of eyeglasses to a clothing item by pinching the clothing fabric between the temple piece and the rest of the eyeglasses, similar to a magnetically secured name tag.