Aircraft propeller construction

TL;DR: In this paper, the authors described a vehicle having a propeller mechanism for propelling the vehicle in a horizontal direction, which includes a receiver positioned on the bottom of the vehicle for receiving the signal as it is bounced off of a surface, defined as a bounced signal.

TL;DR: A variable pitch fan gas turbine engine has a multi-bladed fan including a rotor and a plurality of fan blades as mentioned in this paper, and the fan blades are mounted in pairs on circular root members by means of pin root fixings, and the root members are rotatable about radial axes through their centres to vary the angle of attack of the blades.

TL;DR: In this article, a method and apparatus for drying floors and carpets using a fan for generating a pressurized air stream within a vertical cylindrical shroud that is spaced two to five inches away from the floor on a set of legs such that an opening is formed between the shroud and the floor.

TL;DR: In this paper, a method and apparatus for drying floors and carpets using a louvered grille with a shrouded floor drying fan for generating a pressurized air stream within a vertical cylindrical shroud was presented.