Abstract: The invention relates to a method of driving a shaft by reaction of silanes, preferably silane oils, with air in a double combustion chamber and an assiciated drive mechanism. The hydrogen of the silanes reacts in the first combustion chamber with an insufficient level of oxygen of the air supplied, thereby producing high temperatures. At said high temperatures, the nitrogen from the air supplied reacts with the silicon of the silane to form silicon nitride. The resultant combustion gases and dust and the non-combusted hydrogen are mixed in the second combustion chamber with a large quantity of cold compressed air, the hydrogen undergoing late burning, and they subsequently enter a turbine chamber to actuate turbine blades connected to a shaft. The method is particularly environmentally-friendly since no toxic or polluting waste gases are produced.

Abstract: The description relates to a process and a device for drilling holes in hard rocks like granite, in which the rock to be drilled is exposed to a flame produced by gaseous hydrogen and fluorine together and the reaction products produced by the flame are taken out of the drilling with the aid of a sucked aqueous liquid. In order to be able to implement the process economically while preventing the formation of toxic and corrosive reaction products, the aqueous liquid used to remove the reaction products formed is a lye, e.g. a sodium hydroxide solution, in which the excess hydrogen fluorine formed during the combustion of hydrogen and fluorine is converted into a non-toxic fluoride, e.g. sodium fluoride, while at the same time the other reaction products are converted into water-soluble silicates, aluminates and alkaline fluorides.

Abstract: A discus-shaped aircraft is provided with a peripheral jet arrangement for generating lift and, in the bottom of the aircraft, at least one rocket engine supplied with silicon hydride and compressed air and operated under conditions in which the silicon hydride is reacted with nitrogen of the compressed air to form silicon nitride while the nitrogen of the silicon hydride compounds reacts with oxygen to form H.sub.2 O.

Abstract: A reusable space craft having a disk-shaped casing which receives buoyancy upon horizontal travel through a gas atmosphere and three drive systems on the casing. A first drive system utilizes counter-rotating rotors driven by jet engines on the periphery. A second drive system utilizes a rocket rotor which can swing out from the both of the casing into an inclined position. The third drive system is a main thruster rocket at the center of the bottom fueled by an Si.sub.5 to Si.sub.9 silane propellant.