Abstract: A combustion chamber for a gas turbine using hydrogen as fuel, is equipped with an evaporator for liquid hydrogen which converts the hydrogen into its gaseous form that is fed directly or for instance via an external control valve into the combustor. The evaporator covers and protects at least a portion of the inner and/or outer wall that encloses the combustion chamber, whereby the evaporator also cools the combustion chamber while converting the liquid hydrogen to gaseous hydrogen.

Abstract: The invention provides a flow module comprising sandwiched plate elements, with at least one of each pair of adjacent plate element surfaces having a profiling which has a linear parallel construction so that a plurality of linear parallel flow ducts is formed between adjacent plate elements. These flow ducts can be charged with a first and a second fluid in an alternating manner by way of feeding and removal ducts formed by mutually aligned openings in the plate elements. To seal off the flow spaces and the feeding and removal ducts, seals are provided, and the openings for the feeding and removal ducts extend essentially across the whole end area of the profiling so that a distinct feeding and removal space is formed. According to the invention, for a mechanical stabilization several webs are arranged in the openings for the feeding and removal ducts in the profiled plate elements. These webs which are arranged in the inlet area or outlet area of the profiling end below the plate element surface.

Abstract: A landing process and arrangement for payloads from aerospace missions with a steerable gliding body deployable at high altitudes for accurately returning the payload to the earth surface wherein delicate and stressable elements of the payload are to be recovered. The gliding body is filled with a light gas during its deployment, and the aerostatic lift must be lower than the weight of the landing unit. The payload is divided into a body with delicate elements and a body with stressable elements, wherein the body with the stressable elements is suspended on a pulling element at a spaced location under the other body. After the lower body has come into contact with the ground, the upper body is maintained suspended aerostatically.

Abstract: The invention provides a device for unfolding solar panels 2, 3 for a spacecraft, which solar panels are connected with one another by an articulated axle 4, which in turn is connected with actuating devices for unfolding the panels by way of a tension device gearing provided with cable pulleys 11. An uncoupling mechanism, operative after unfolding of one panel 3, permits the articulated axle 4 to be separated from the tension device gearing. Upon swivelling of the unfolded panel 3 into an unfolded position, a pin 8, which is arranged in parallel to the articulated axle 4 engages in circumferentially extending grooves 12 and 12a. In this manner, the swivelled panel 3 can be guided to follow the solar altitude.

Abstract: A directional coupler that can be produced entirely in integrated technology (MIC or MMIC), particularly for the X-band. The directional coupler can be designed for a high coupling attenuation (>30 dB) and a high directivity (>30 dB) with a large relative bandwidth (approximately 20%). This is achieved with a stepped arrangement comprising a plurality of .lambda./4 waveguide sections and coupling capacitors disposed between the respective paths of the coupler.

Abstract: In a gear-shift device for a change-speed gearbox, a shift actuator, a selection actuator, an actuator which is arranged such that it can be displaced exclusively axially with regard to a housing, an auxiliary transmission for converting a rotary motion into a reciprocating motion, a brake which is connected to the selection actuator and an engageable and disengageable locking device are arranged in terms of their action in such a manner that two of the three actuators are arranged fixed in terms of movement with respect to one another and are connected to the third actuator by the auxiliary transmission, and the selection actuator is fixed either in a rotationally fixed or axially undisplaceable manner with regard to the housing.

Abstract: In order to produce lightweight mirror structures or other reflecting components, preformed silicon elements of sufficient wall thickness are applied to a CFC or CMC substrate structure with the dimensions of the component to be produced, at a temperature in the range 1300.degree. C. and 1600.degree. C. either in vacuum or in a protective atmosphere. In this way a mirror structure or reflector is formed directly. It is possible to work at temperatures in the range of 300.degree. C. to 600.degree. C. when the silicon is applied in the form of a preform such as a wafer, which is joined to the substrate by way of a zone of a melt eutectic incorporating a nonferrous metal, which is preferably gold. The surfaces are subsequently coated.

Abstract: A two-stage evaporator unit converts a liquid reactant mass flow adjustable as a function of a load presetting into a gaseous reactant mass flow. The liquid reactant mass flow is at least partially evaporated in the first stage by a heat-exchange medium, and, if appropriate is completely evaporated and subsequently superheated in the second stage. The evaporator unit is formed by the alternating stacking one on the other of foils having heat-exchange channels and by foils having reaction channels that, in each case, have at least one first and one second stage integrated in one foil. The first stage is configured as a channel with a minimized cross-sectional area which is directly connected to the inflow conduit. The first stage is operated at high coefficients of heat transmission. The total cross-section of the reaction channels in the second stage increases in the flow direction.

Abstract: A rail mounted vehicle speed measuring device includes a first magnetic field generating member and a first magnetic field sensing member positioned at a first measuring location on the vehicle; a second magnetic field generating member and a second magnetic field sensing member positioned at a second measuring location on the vehicle, spaced a fixed distance from the first location in the direction of vehicle movement; wherein the magnetic fields generated by the first and second magnetic field generating member are influenced by the rail to produce first and second signal patterns sensed by the first and second sensing member and varying with movement of the vehicle along the rail; and device is provided for correlating the first and second sensed signal patterns to determine the time displacement between the two sensed signal patterns and the velocity of the vehicle.

Abstract: A servo valve for an injection nozzle includes a housing having a valve chamber, a high-pressure opening, a connecting opening and a return opening. The valve chamber movably accommodates a valve member which can be displaced by actuating means to bear selectively against a first seat and a second seat. The valve member, when bearing against the first seat, closes the return opening and connects the high-pressure opening to the connecting opening. When bearing against the second seat it closes the high-pressure opening and connects the connecting opening to the return opening. The connecting opening is connected to a working chamber of the injection nozzle whose nozzle is closed when the working chamber is subjected to high pressure and opens upon a drop in pressure in the working chamber. The actuating means includes a component which varies in length when electrically actuated and which is connected to the valve member through the return opening by way of an actuating member.

Abstract: A luggage compartment system for a passenger cabin, especially for commercial airliners, is equipped with compartment units each formed by at least two compartments interconnected or coupled through a coupling, guide and drive mechanism (13) for moving the compartments of a unit from a closed upper position to an open lower position and vice versa. Each unit has a large compartment and a small compartment, the latter is intended for smaller luggage items, including fragile items, while the larger compartment is intended for large luggage including suitcases. In the closed position the two compartments of a unit are arranged next to each other in a direction extending crosswise to a longitudinal central vertical plane (10) through the aircraft cabin. The compartments have for their bottom contoured panels that are integrated into the ceiling of the cabin in the closed compartment position.

Abstract: A method of fabricating an HBT using differential epitaxy. By using an emitter mask and an exside-inside spacer structure, a self-aligned fabrication of an emitter contact and a base contact is carried out. The emitter contact layer is made from amorphous silicon. Since the entire process sequence is very temperature-stable and can be carried out at lower implantation energies than conventional methods, HBT's having a high layer quality can be fabricated by the method of the invention which is suitable for mass production and with which high oscillation frequencies can be accomplished.

Abstract: A connector element is provided for variably laying and protecting insulated electrical conductors or cables for interconnecting the electrotechnical devices and lightning protective systems in aircraft and spacecraft. The connector element (29) includes a protective corrugated hose (25) connected to a screw-on component (1) by a collar nut (3) screwed onto the screw-on component (1). The collar nut (3) engages a flange (26A) on an end of the hose (25) and clamps it against the screw-on component (1). Insulated electrical conductors or cables (8) are guided through the hose (25), which is conductively connected to the aircraft structure. The hose (25) serves to protect, hold, and guide the electrical cables (8) in a desired configuration. The corrugated hose (25) includes a compressed portion (25A) with a small corrugation spacing, whereby the hose (25) is bendable into a desired configuration, yet is form-retaining and flexurally stiff to maintain the bent configuration.

Abstract: A projectile, particularly for nonlethal active components. The projectile has a disintegratable shell with pyrotechnic means. The projectile has two or more shell layers made of explosive foil, each alternating with another shell layer made of supportive foil material, between a radially outer shell layer made of supportive foil material and a radially inner protective shell. The different layers made of explosive foil can be ignited sequentially when viewed radially from the outside to the inside.

Abstract: An organic layer for subsequent coating with a cover layer which is harder than the organic layer, and a process for surface treatment of the organic layer. In order to improve the quality of a subsequently applied cover layer, growth nuclei for the cover layer, which exhibit sp.sup.2 and/or sp.sup.3 bonding orbital hybridization, are arranged and/or exposed on the free surface of the organic layer.

Abstract: A method and a device for vehicle guidance as a function of the traffic situation is provided, during which vehicle guidance the traffic situation data are evaluated in a control center which has a computer. The control center computer determines the optimum route as a function of starting data, the traffic situation data and stored road network data in the form of sequences of intermediate destinations such that a vehicle-end navigation device is capable of reproducing successive sections of the optimum route and issuing the associated guidance instructions by using a traffic situation-independent route search method. This system permits a traffic situation-dependent vehicle guidance in which the more costly route optimization tasks are performed by the control center computer. The vehicle-end navigation computer only has to carry out traffic situation-independent route finding tasks.

Abstract: An arrangement for dividing an aircraft cabin that extends perpendicular to the longitudinal direction of the cabin, includes a divider wall that is guided in a position adjustable manner in guide tracks that are arranged stationarily fixed along the aircraft cabin. The divider wall includes a plurality of individual divider elements. Each divider element is held slidably by corresponding support members in at least one guide track. Each guide track is arranged in the area of joints between cabin interior components. With this arrangement, running grooves, scratches, and lubricant smears on visible furnishings or fitting in the interior of the aircraft cabin can be avoided. The cost and effort for cleaning and maintaining the aircraft cabin are thus significantly reduced. The arrangement does not restrict the open or clear cross section of the cabin, particularly in the head room area, thereby reducing a source of danger to passengers.

Abstract: The invention relates to a liquid crystalline, photo cross-linkable main-chain polymer used as interferentially effective, chromophoric substance for colored paints, in which the main mesogenic groups are disposed at least approximately in a chiral-nematic manner. An etherified cellulose ether or a mixture of several etherified cellulose ethers is used pursuant to the invention as liquid crystalline main-chain polymer or polymers wherein:the cellulose ethers have a molecular weight of 500 to 1,000,000,the anhydroglucose units of the cellulose ethers are etherified with an average degree of molar substitution of 2 to 7 with propylene oxide or ethylene oxide units (C.sub.3 H.sub.6 O- or C.sub.2 H.sub.4 O-units), andthe cellulose ethers are etherified with an average degree of molar substitution of 1.5 to 3 with unsaturated hydrocarbon groups (C.sub.r H.sub.2r-1).

Abstract: The present invention pertains to a device with nonlethal interference active bodies for combating aircraft, which violate or do not heed flight bans, etc., and can be forced to land due to vibrations and interferences in the air current on the aerodynamic surfaces. A series of embodiments are described and depicted in the figures of the drawing.