Abstract: A rotor stage disposed within an annular fluid flowpath in a turbomachine is disclosed. The rotor stage includes outer and inner rings and a plurality of first and second airfoils. The outer and inner rings define flowpath surfaces for said flowpath. The first and second airfoils extend between the rings for transferring energy between the fluid and the rotor stage. At least one of the first airfoils surrounds means for transmitting energy across the flowpath.

Abstract: An improved counterrotating power turbine is disclosed. The power turbine includes a support having an annular axial cross-section and forward and aft portions. The forward portion of the support has a diameter greater than the diameter of the aft portion. Also included are a first rotor and a second rotor. The first rotor is supported on the first portion of the support by first bearing means and extends to the aft portion forming a first interface therewith. The second rotor is supported on the first rotor by second bearing means and extends to the aft portion of the support forming a second interface therewith. In this manner, it is possible to have low diameter slip rings at the first and second interfaces while maintaining relative high diameters for the rotor bearing means.

Abstract: The invention relates to a rotor device, preferably a boat propeller device. The propeller shaft drives, via a planetary gear system, two propellers in the rotational direction of the shaft and one propeller counter to the rotational direction of the shaft. The propellers are dimensioned so that they absorb approximately equal torques.

Abstract: A temperature indicating propeller assembly comprises first and second propellers freely suspended one above the other on a common suspension wire for rotation by rising air currents. One propeller is of larger diameter than the other so that it commences rotation by air currents generated at lower temperatures than the other propeller. The assembly can be suspended over a domestic stove, for example, to indicate when the stove is operating at normal temperature by rotation of the one propeller, or when the stove is operating at an excessive temperature by rotation of both propellers.

Abstract: A hydraulic-energy conversion system in which an output shaft is drivingly connected through a planetary gear to at least one turbine stage comprising a first turbine rotor with a plurality of left- or right-handed blades and a second turbine rotor with a plurality of right- or left-handed blades. In one embodiment the output shaft and those of the first and second turbine rotors are extended coaxially of each other and the sun gear carried by the output shaft is in mesh with the planet gears carried by the second turbine rotor and in mesh with the internal gear carried by the first turbine rotor. In operation hydraulic energy; that is, water or wind causes the first turbine rotor to rotate in one direction and the second turbine rotor to rotate in the other direction and because of the planetary gear transmission the output shaft can rotate about twice as fast as that of the conventional system, whereby high conversion efficiency and a high output power can be attained.

Abstract: A model having a flying saucer shaped body which is provided with lift by means of a thrust producing device such as a reciprocating Wankel or turbine engine and a propeller. The body is prevented from rotating by means of counterrotational fins, and stability in the horizontal plane is provided by means of an internal gyro rotor actuated by the airflow from the propeller.

Abstract: The use of thrusters at the bow and stern of an airship for control of the direction, attitude, and orientation of such an airship is described. The thruster utilizes an electric motor or a gas turbine for power. In the electric motor embodiment, the motor utilizes two contra-rotating rotors which each drive a separate and contra-rotating propeller to generate the controlling jet of air. Thrusters are arranged in pairs at the top, bottom, and each side of the bow and stern of the airship. Lifting thrusters directed downwardly and located above the longitudinal extent of the hull are provided to augment the static lift capability of the airship when under heavy load.

Abstract: A wave motor is comprised of two or more parallel rotors having apertured radial paddle elements with hinged flaps or blades covering the apertures such that upon the impingement of water upon one side of the paddles the blades cover the apertures and the wheel is turned, but upon impingement of water against the other side of the paddles the blades swing open. Each pair of rotors are coaxially mounted and designed for rotation in opposite directions to maximize extracted power regardless of the predominant current direction, and a single take off shaft is coupled to the rotors through a ratchet and gear mechanism.