Abstract: Flow control ducted fans are disclosed. A disclosed example flow control apparatus for use with an aircraft includes a duct defining an inner cavity with a primary flow path, a fan disposed in the inner cavity, an aperture on an exterior surface of the duct and upstream from the fan, the aperture fluidly coupled to the inner cavity to define a secondary flow path, and a door to control a degree to which the aperture is opened.

Abstract: Flow control ducted fans are disclosed. A disclosed example flow control apparatus for use with an aircraft includes a duct defining an inner cavity with a primary flow path, a fan disposed in the inner cavity, an aperture on an exterior surface of the duct and upstream from the fan, the aperture fluidly coupled to the inner cavity to define a secondary flow path, and a door to control a degree to which the aperture is opened.

Abstract: Disclosed is an electro-mechanical apparatus for snugging a boot, especially a snow ski boot, around the calf of the user. The apparatus is essentially comprised of a reversible electric motor, a jackscrew, a switch, two brackets, a strap, and a power supply. The invention enables the user to achieve a desired snug fit by first placing a foot of the user into the boot, then operating the electric motor to turn the jackscrew, bringing the two brackets together and thereby tightening the strap around the boot to reach the desired fit. Once the desired snug fit is achieved, the electric motor is switched off, the user closes pre-existing latches on the boot to lock the boot parts into place, and the user removes the apparatus from around the boot by unbuckling a quick release buckle provided for this purpose. The apparatus may then be stored for later use.