The invention relates to the parachute rescue system for aircrafts with a rotating blade, as are helicopters or gyroplanes.

Background of the Invention

Up to the present are parachute rescue systems relatively routinely used especially for ultralight aircrafts aiming to the rescue of these aircrafts and their crews in crisis situations during the flight, such as at accidents owing to a mutual collision, to an engine failure or the loss of possibility to manage the aircraft, its destruction and accidents like that. Usually it concerns rescue systems, consisting of at least one rescue parachute, that is packed in a mounting box and has a rocket engine. Rescue systems may be furnished as well by another driving mechanism for carrying of the rescue parachute out in case of emergency, such as a spring-actuated or an air-operated mechanism, or possibly by a gas producer. These rescue systems may be than if necessary activated by activating handles or other starting devices installed within the pilots reach and connected by an activating wiring with the out-carrying mechanism of the rescue parachutes. From the patent record CZ 285318 is in this way known the parachute rescue system especially for ultralight aircrafts, hang-gliders and engine three- wheelers, activated by a rocket engine, that carries out of the aircraft range the parachute canopy packed in the inner box. The inner box is inserted together with the suspension ropes and the connecting belt in an outside box, with a separated cover. The rocket engine, fastened on the outside box, is connected by a connecting rope with the inner box and the connecting belt, connected with the carrying ropes of the parachute, is by its other free end, provided with a propelling snap hook, grappled to the aircraft fuselage. The release of the rocket engine is connected by a control rope with a handle, which is in the reach of the pilot. From the patent record EP 1509448 is as well known a rescue mechanism of the aircraft, where the parachute system is completed in the bottom of the aircraft by air bags, working as usual airbags and absorbing the shock of the impact.

As well this, as other known solutions cannot be used with helicopters, gyroplanes and other aircrafts with a rotating blade, in view of the vertical rotor axis of their rotors. To a certain extent is the problem of use of these rescue sytems solved by parachute systems for helicopters accordingly with the patent record US 6, 199,799; according to it is the rescue parachute placed in the upper extension of the helicopter over the blades of its rotor.This solution is possible only by helicopters with a hollow rotor, through which goes the suspension bar of the upper extension.

From the patent record US 5,836,544 is then known an emergency landing system for helicopters, which encloses at least one parachute and is simultaneously fulfilled by bottom airbags, located under the bottom part of the helicopter. But this solution can be used especially for large size helicopters, where it is possible to place the parachutes in such position, in which their connecting ropes with the helicopter are out of the revolving rotor range.

Summary of the Invention

The upper mentioned handicaps of the present of engineering are to a large extent removed by a parachute rescue system for aircrafts with a rotating blade, as are primarily helicopters or gyroplanes, which consists activation of the system in an at least of one rescue parachute, that is packed before the system activation in the mounting box and is furnished by a rocket engine or as well by another driving mechanism, connected by an activating wiring with the activating handle installed within the pilots reach, according to the submitted invention. The entity of the invention is based on the state, where one or more rescue parachutes are fastened round about the rotor of the aircraft with a rotating blade under its revolving blades by at least one derrick guy, that goes after the activation end through these revolving blades in the direction upwards, on it is the derrick guy provided by a rope swivel-type head in order to eliminate the tranfer of the rotor revolving on the parachute ropes.

This rope swivel-type head may be made for example by two towards one another revolving lifting eyes, and to the bottom lifting eye is by one end fastened the derrick guy and to the upper lifting eye is fastened at least one rescue parachute. Without such a rope swivel-type head would otherwise, after the activaton of the parachute rescue system, follow a contraction of the parachute ropes and in this way as well the collaps of the parachute canopy, which would get out of order. The entity of the invention is as well based on the fact, that the derrick guy is in the most favourable realisation of the invention fastened by its second end to a ring swivel-type head, arranged around the rotor under its revolving blades, which is made by a supporting collar with fastening soles for fastening of the revolving collar head to the aircraft with a rotating blade. The supporting collar is simultaneously provided towards it by revolvingly placed fastening collar with at least one catching eye for fastening of the derrick guy, from the resistence view better with more catching eyes, optimally with two, placed against one another for fastening of two derrick guys. The supporting collar and toward it revolvingly placed fastening collar of the collar revolving swivel-type head are with advantage placed in the level vertical to the rotor axle with the rotation centre of the. fastening collar in the rotor axle, and the fastening collar is placed under the supporting collar, while the fastening soles are arranged on the inner perimeter of the supporting collar and the catching eyes on the external perimeter of the fastening collar.

The parachute rescue system according to the invention may be in this way by its supporting collar fastened better optimally to the aircraft fuselage, to its engine or reducer, which secures its maximal carrying capacity. During the system activation comes as the effect of the rocket engine or other driving mechanism to carrying out, and usually from the side of the aircraft with a rotating blade, as are helicopters and gyroplanes, of one or more rescue parachutes to a sufficient distance from the aircraft, that after filling of the parachute canopy or canopies and after it by sliding out of their derrick guy over the rotating rotor blades they get in case of need over the aircraft with rotating blade, respectively over the helicopter or gyroplane and enable in this way its safe landing.

In another realisation of the invention may be the derrick guy for attachment around of the rotor provided on its end otherwise only by a guy sling, which after the carrying out of the rescue parachute contracts around of the rotor axle, nevertheless in the above mentioned most favourable realisation after the activation of the rescue system does not threaten the damage of rotor adjusting elements, prevented is the extreme rotor axles overloading during the opening of the parachutes and the whole system of the of the rotor adjusting stays functional. The rescue, respectively safe landing, is in this case possible even with the loss of the rotor. Of course it must be, especially in the case of the derrick guy, an enough strong guy, such as steel cable, aramid cable, called as well as kevlar, in order not to disturbe the rotor by its sliding out.

The advantage of the solution by this invention is aspecially in improving of the safety of the crew and preventing of engine damage during emergence of any crisis situations, which was till now problematic in respect to the above mentioned vertical rotary axis of their rotors. Especially by helicopters is during the activation of the rescue system the mechanic system of rotor blades not damaged, control and the periodicity of rotor blades running is preserved for a more safe descent.

For a correct function of the ballistic rescue system is fully sufficient one rescue parachute, combined through the canopy rope and the swive-type head with a derrick guy. But more efficient is the use of more rescue parachutes, the best of three, interlocked together to one parachute system, lockated either in one storage box, devided optimally according to the number of rescue parachutes, or possibly as well in more storage boxes, and in this case are the rescue parachutes carried out by one rocket engine and they are fastened with one common swivel-type rope and one swivel-type head by one derrick guy.

Nevertheless it may be possible to take as well into consideration the use of more separate parachutes, placed singly in separately storage boxes, and they may be carried out from various sides of the helicopter or gyroplane by separate rocket engines; in this case are they fastened over separate swivel- type ropes and swivel-type heads around the rotor by separate derrick guys.

Brief Description of the Drawings

The invention will be hereafter explained by drawings of particular examples of parachute rescue system realisation according to the invention, where it represents Fig. 1 - the most expedient example of realisation with the revolving collar head including the schematical suggestion of the rescue parachute after the activation of the rescue system, Fig. 2 - detail of the rope swivel-type head,

Fig. 3 - the parachute rescue system on an aircraft with a rotating blade before the activaton,

Fig. 4 - the parachute rescue system with three rescue parachutes during the activation,

Fig. 5 - the parachute rescue system on an aircraft with a rotating blade before the activation in the second example realisation with guy sling.

Examples of the Invention Realisation

Example 1 The parachute suspender of the rescue system for aircraft with a rotating blade, as are helicopters or gyroplanes, consists in the most favourable realisation, represented on the Fig.1 till Fig.3, from one rescue parachute that is packed before the system activation in a mounting box 2 and is furnished by a rocket engine 3 located in the rocket box 4 connected by an activating wiring 5 with the activating handle 6 installed within the pilots reach. The mounting box 2 with the rescue parachute is before the system activation covered in the coat JJ5 of the aircraft with a rotating blade 14 respectively in this realisation example in the side coat of the helicopter.

The rescue parachute 1 is by its canopy rope 9 fastened to the aircraft with a rotor blade 14 under the revolving blades 17 of its rotor 16 by two derrick guys 1_2, which go after the system activation end through these revolving blades 17 in the direction upwards, and the canopy rope 19 of the rescue parachute 1 is by derrick guys 12 connected by the rope swivel- type head 8 for elimination of the rotor 16 rotation transfer on the parachute ropes. The connection of both derrick guys 12 with the rope swivel-type head 8 by the rope swivel-type head suspension rope 7 is safed by a snap hook 20 . As evident in detail from the Fig. 1 , are both derrick guys 12 by their second end fastened by their second ends to a ring swivel-type head 80, arranged around of the rotor 16 under its revolving blades 17. This ring swivel-type head 80 is made by a supporting collar 81 with fastening soles 82 for fastening of the swivel-type head 80 to the here not represented aircraft with a rotating blade 14, and the supporting collar 81 is provided towards it by revolvingly placed fastening collar 83 with two catching eyes 84 placed one against the other for fastening of the derrick guys 1_2. The derrick guys 12 with the snap hook 20 and a rope swivel-type head 8 of the canopy rope 9 are before the activation of the system placed on a ring swivel-type head 80 , as indicated by relevant reference signs on the Fig. 3.

The supporting collar 81 and to it rotatingly placed fastening collar 83 of the ring swivel- type head 80 are placed in a plane vertical to the rotor axle 16 with the centre of rotation of the fastening collar 83 in the rotor axle 16 and coherently is the fastening collar 83 placed under the supporting collar 81. The fastening soles 82 are concurrently arranged on the inner perimeter of the supporting collar 81 and the catching eyes 84 on the external perimeter of the fastening collar 83_. Between the supporting collar 81 and the fastening collar 83 is placed a not represented thrust bearing.

As evident in detail from the Fig. 2, the canopy rope 9 of the rescue parachute 1 is fastened into the upper revolving lifting eye 9 and the derrick guys 12 over the here not represented snap hook 20 into the bottom revolving lifting eye 10 of the rope swivel-type head. Of course instead of the snap hook 20 may be used another lifting component, or the derrick guy 12 may be pulled directly through the bottom swivel-type eye 10 The rope swivel-type head 8 is provided in the dividing plane H by the as well not represented thrust bearing, to eneable mutual rotation of both revolving lifting eyes 9 and 10 one to another in the_direction marked by the dart. From Fig. 1 is obvious, that after the activation of the system and after the side carrying of the rescue parachute 1 out into the exterior environment comes to its unfolding over the revolving blades T_7 of the engine rotor 16, which enables its safe landing. The burnt out rocket engine 3, as is as well obvious from Fig. 1 , remains at it fastened through the connecting fabric binding 18 on the canopy of the rescue parachute 1.

Example 2

On the Fig. 4 is then represented a similar realisation of the invention with three rescue parachutes 1 their canopy ropes 19 are with the derrick guys 12 connected over the snap hooks 20 and one common suspension rope 7. As is evident from the Fig. 4, after the system activation are the rescue parachutes 1 carried out into the exterior environment and they as well settle themselves over the revolving blades 17 of the engine rotor 16 and enable its safe landing. The connecting fabric binding serves to concurrent carrying out of all rescue parachutes 1 by one rocket engine 3.

Example 3

The parachute rescue system on the third example of the realisation of the invention, represented on the Fig. 5, consists as well from three rescue porachutes 1, coupled into one parachute system; they are before the system activation packed in one mounting box 2, divided in three mounting sections and they are furnished by one common rocket engine 3 placed in the rocket box 4, connected by the activating wiring 5 with the activating handle 6, installed within the pilots reach. Separate rescue parachutes 1 are with their parachute cordes and the canopy ropes 19 as injhe 2 ^nd' example of realisation connected by here not represented snap hooks 20 with one suspension cable 7, which is by a swivel-type head 8 connected with the derrick guy 12 .

In contrast with the realisation example 1 is the derrick guy 12 on its end furnished by a guy clamping loop 13, arranged around the rotor 16 of the aircraft with a rotating blade 14 under its revolving blades 17.

As the mounting box 2 with the rescue parachutes 1 and their suspension rope 7, as well as the rocket box 4 with the rocket engine 3 and the derrick guy 12 with the clamping roop 3 are before the system activation 1 covered in the coat 15 of the aircraft with a rotating blade 14 respectively in this realisation exemple in the side coat of the helicopter.

Although all above mentioned examples of the realisation of the invention concern so called ballistic rescue systems, where the rescue parachutes 1 are carried out by the rocket engine 3, still it is possible to use for carrying out of rescue parachutes 1 as well other driving gears, mentioned in the description of the present state of the engineering, it means i.e. spring- actuated or air-operated mechanisms, or possibly gas producers, without touching the substance of the invention itself. Field of the Application

It is possible to use the invention especially as by gyroplanes, as well by helicopters with exception of helicopters with contrarotating rotors, working in one axle. List of reference signs

I rescue parachute

2 mounting box

3 rocket engine

4 rocket box

5 activating wiring

6 activating handle

7 suspension rope

8 rope swivel-type head

9 upper revolving lifting eye

10 bottbm revolving lifting eye

I I dividing plane

12 derrick guy

13 guy loop

14 aircraft with a rotating blade

15 coat

16 rotor

17 revolving blades of the rotor

18 fabric binding

19 canopy rope

20 snap hook

80 ring swivel-type head 81 supporting collar

82 fastening soles

83 fastening collar

84 catching eyes