DE1059771B - Righting device for aircraft taking off from the tail stand - Google Patents

Description

Erecting device for aircraft taking off from the tail stand on-board parties Devices for erecting or turning down stern starting or landing aircraft that use on-board assistants are known. she require either relatively large servomotors or long erection times.

The invention described below pulls the thrust of the main engine, with a special design of the chassis, to straighten up, with the Transfer of the aircraft that has landed on the tail, freed work in a compressed air storage with oil seal (and supplementation of the oil seepage from the on-board high-pressure system) for the startup process is retained.

Since the thrust - e.g. of a jet engine - represents an external force, During the righting process, the aircraft must prevent it from rolling away by means of a brake block (in this case in front of the nose wheel).

According to Fig. 1, the nose wheel sits on a relatively long lying flat Leg that can be pivoted down and back until it is in the flight position a keel fin protruding from under the aircraft, which is also used for stabilization serves in supersonic flight (dashed position).

At the rear of the aircraft are two landing gear wheels (each on the right and left, for example at the wing tips), which together with the pivotable nose wheel result in a three-point support. (In top view in Fig. 3.) In Fig. 2 the vertical take-off or landing position can be seen, in which the nose wheel leg is only slightly extended from its flight position, while a Auxiliary support, preferably cushioned against impacts, approximately at the end of the vertical fin forms a fourth base.

In Fig. 1, the support of the aircraft fuselage on one or more preferably hydraulic pistons can be seen, which press the oil displaced when the aircraft is folded over with the strut pivoting out into a pneumatic reservoir, which can be located in a spatially suitable other place and before the first take-off non-on-board funds are topped up to full pressure.

A throttle valve in the connecting line between the piston and the accumulator allows a finely dosed braking of the overturning speed to the horizontal position; also - if desired - a damping of the righting movement, in which the ; moderate engine thrust from back expansion with regard to tip-over the stored air is effectively supported.

Without this quickly available storage energy, a servo center only needed to maintain pressure (because of small amounts of seepage), thrusts of multiples of the weight needed to get the plane out of the necessarily pry up the flat spreading lever position (Fig. 1) against the bow leg supported on the brake block. Firstly, however, these relapses are not available; secondly, they would be immediate Cause the aircraft to stand upside down.

The articulation points of the support piston and cylinder on the leg and fuselage and the compressor volume are to be provided in such a way that the individual erecting phases the best possible balance of forces from the weight and the still stable thrusts with the hyperbolic compression characteristic of the air reservoir.

Since the leg swivel angle is almost 180 °, the cylinder of the Spreader pistons can be swiveled at a suitable point and the pressurized oil guide whenever possible through the pivot pin.

The erecting gear can be dimensioned as an emergency landing gear.

Claims (2)

PATENT CLAIMS: 1. Righting device for people starting from the rear stand Aircraft, characterized by a single or multiple provision, proportionate long lever, one end of which is on the aircraft, mainly on the fuselage and mainly on the rear half of the fuselage, preferably in the area of the aircraft's center of gravity is hinged and under the action of the thrust of the aircraft engines from a facing downwards by almost 180 ° in a vertical plane can be pivoted backwards, the other end of the lever with one If necessary, brakable wheel, a runner or the like. Is provided and the rear End of the aircraft in a manner known per se with one or more support runners is provided. 2. Apparatus according to claim 1, characterized in that the or the levers with a preferably hydraulic or pneumatic working storage device are connected, primarily in the sense that when the aircraft is transported from the vertical in approximately ground-parallel position a storage of this The work gained occurs when straightening the aircraft in a vertical position supporting the torque generated by the thrust of the engines, is used, this working memory device at the same time as a damping device when moving the aircraft from a vertical position parallel to the ground and can be applied.