Aeronautics and astronautics – Landing field arrangement – Mooring devices
Patent
1985-01-09
1987-05-05
Peters, Jr., Joseph F.
Aeronautics and astronautics
Landing field arrangement
Mooring devices
254283, 254295, B64F 112
Patent
active
046625860
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for moving aircraft on flat surfaces with the aid of cables which, on the one hand, act on the aircraft and, on the other hand pass to winch drums via guide pulleys which are in part displaceable.
The invention is based on the problem of making the known moving apparatus suitable for use onboard ships for aircraft, in particular for helicopters, in order to be able to move them selectively, even during severe listing of the ship, at constant speed from the landing location to the parking location and from the parking location back to the starting location. In so doing a helicopter, for example, can be moved on its undercarriage or by means of a transport trolley with the cables being operated from a specially constructed winch.
The apparatus of the present invention has the advantage that as soon as the helicopter has been connected to the cables all attached cables can be tensioned by means of the winch so that lateral displacement of the helicopter on the deck of the ship can be avoided during possible listing of the ship. After the cables have been tensioned the helicopter is moved by means of the winch to its allocated location with the pretension in the cables also being maintained during movement of the helicopter. The cables leading from the winch to the helicopter can run on the deck, whereas the cables extending from the helicopter to the winch via deflection pulleys can extend on or below deck, in the latter case, the cables are passed to the winch and are suspended by means of pulleys. Further details of the invention, in particular of the winch, can be found in the subordinate claims.
The invention will now be explained in more detail with reference to several graphically illustrated embodiments. There are shown:
FIG. 1a is a plan view of a moving apparatus in accordance with the invention and having two cables;
FIG. 2 is a moving apparatus in accordance with the present invention having three cables; having four cables;
FIG. 4a is a moving apparatus in accordance with the present invention for serving two parking locations;
FIG. 4b is a view taken in elevation of a moving apparatus of FIG. 4 showing a deflection pulley and a helicopter to be moved;
FIG. 4c is a view showing in greater detail an arrangement between a deflection pulley and guide rails of the present invention;
FIG. 5a is a plan view of a moving apparatus according to the present invention with two cables;
FIG. 5b is a view taken in elevation of the view of FIG. 5a;
FIG. 6 shows a winch for a moving apparatus having two cables;
FIG. 7 shows a winch for a moving apparatus having three cables and showing a line of symmetry for a moving apparatus having four cables;
FIG. 8 shows a braking device for winch cables; and
FIG. 9 shows a displaceable winch.
Referring to FIGS. 1a and 1b, the pretension force is selected in the winch W, through the path of the two cables S in an almost common axis, to be just sufficiently high that slight lateral movements of the helicopter H are possible on the deck B during listing of the ship in order to keep the loading of the cables S low.
In accordance with FIG. 2 lower forces occur in the cables S, in accordance with the parallelogram of the cable forces, through the side forces acting on the helicopter H than would occur with a straight path of the cables S for the same forces in the moving apparatus of FIGS. 1a and 1b.
In accordance with FIG. 3 the cable forces are further reduced in comparison with the moving apparatus of FIG. 2. Referring to FIGS. 4a, 4b and 4c, the requirement for two parking locations in the moving apparatus of FIGS. 1a and 1b, 2 and 3 is satisfied by the provision of removable deflection pulleys 1, the positioning of which allows the path of the cables S to be changed.
Furthermore, guide rails 2 which can also extend in a curve can be provided beneath or alongside the helicopter H. In accordance with FIGS. 5a and 5b the cables S are guided over the deck D in such a way that they form a retaining fence alongside the two longitudinal sides o
REFERENCES:
patent: 2922625 (1960-01-01), Heacock
patent: 3533358 (1970-10-01), Leuenberger
patent: 3787031 (1974-01-01), Lucas
patent: 3961771 (1976-06-01), Kumasaka
patent: 4319722 (1982-03-01), Pesando
patent: 4529152 (1985-07-01), Bernard
Blohm & Voss AG
Fiorito Lynn M.
Peters Jr. Joseph F.
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