SU1830354A1 - Device for filling the tank of a fire seaplane - Google Patents

Description

The invention relates to the field of aviation technology, in particular to fire-fighting seaplanes, and relates to the design of a device for filling an aircraft tank with liquid.

The aim of the invention is the expansion of operational capabilities by providing a set of water on the planing mode.

The invention is illustrated by drawings, where in Fig.1 shows a fire seaplane: in Fig.2 - water intake device, side view: in Fig.Z - section aa in Fig.2.

A device for filling the tank with liquid contains an intake 1 having an intake 2 and an outlet 3, a pipe 4 having an outlet 5, a water pipe 6, telescopically connected to a pipe 4, having pins 7 included in grooves 8. made in the water pipe 6, providing limited linear movement and precluding angular movement of the water conduit 6. At the lower end of the water conduit 6 a hydrofoil 9 is fixed having an inlet 10 of the pipeline 6 on the lower surface. The angle of attack and roll of the hydrofoil 9 are selected taking into account the water surface generated for redanom. Tank 11 is installed in the boat (fuselage of seaplane 12).

The device operates as follows.

The intake device is lowered into the water when planing. The conduit 6, under the action of mass forces, tends down, and under the action of the lifting hydrodynamic force generated on the hydrofoil 9, it is kept at a constant depth. Water under the action of hydrodynamic pressure generated by the movement of the seaplane 12 relative to the water enters through the inlet 2 and the outlet 3 of the inlet 1 through the conduit 6 and the pipe 4 into the tank 11. At the exit section 3 of the inlet 1 due to the difference in the cross-sectional areas of the outlet 3 water intake 1 and the inlet section 10 of the pipeline 4, the pressure in the stream decreases and water suction through the gap is formed. Thus, in addition to the volume of water passing through the intake opening 2 under the pressure of a high-pressure head, the tank 11 also receives the volume of water ejected by the main stream through the gap between the inlet 10 and the intake

1.

The claimed technical solution allows, maintaining a constant depth of immersion of the water intake device, to ensure its minimum hydrodynamic resistance. The presence of a hydrofoil increases the hydrodynamic pressure at the inlet of the pipeline and thereby increases the speed of the water entering the tank. In addition, the hydrofoil eliminates the formation of splashes and waves by the intake device, which, when the contaminated part of the seaplane is washed out, causes instability of its movement on planing.

Claims (1)

Claim A device for filling the tank of a fire-fighting seaplane with liquid, containing a water intake having an intake and an outlet, made in the form of a jet pump formed by the difference in the diameters of its outlet and the inlet of the pipeline connected by its outlet to the tank, characterized in that. that, in order to expand operational capabilities by providing water intake in the planing mode, it is equipped with a water pipe connected to the pipeline telescopically with the possibility of limited linear movement, and a hydrofoil mounted on the lower part of the water pipe, the inlet of which with the outlet inlet located therein located on the hydrofoil.