Abstract: A first stage earth to low orbit shuttle having mixed-mode propulsion and dual fuel rocket engines. A cargo bay is designed to receive a second stage dart vehicle capable of attaining geosynchronous orbit, deep space and lunar capabilities from launch at low earth orbit from the space shuttle. Upon return from geosynchronous orbit, the dart vehicle would reenter the atmosphere, and rebound toward an outward trajectory. At this point, projectiles would be launched for reentry and the dart vehicle can deviate cross range to a landing site.

Abstract: The invented space structure is elongated and closed upon itself in the form of a ring or belt. In the preferred form it encircles a gravitational body and rotates at or above orbital velocity, while in an alternate form it does not encircle any gravitational body. Said space structure for attaching, among other things, equipment such as sensors, communication devices, energy collectors and transmitters.

Abstract: An aerospace vehicle incorporates within the same stage two different main propulsion systems that are operated in sequence. The first system involves the use of high density-impulse propellants, and the second system involves the use of lower density-impulse propellants to achieve higher final velocities than would otherwise be the case if the total available volume were used for either set of propellants separately. In one arrangement, one stage of a propulsion aerospace vehicle incorporates provisions for carrying and burning three different propellants, --two fuels and a common oxidizer or two oxidizers and a common fuel. Certain of the wing and/or body structures are designed to serve as tankage volume for low pressure storage of at least one of the propellants, which is one that does not require special pressurized tanks.