SU50362A1 - A device for calculating parachute jumps - Google Patents

Description

A parachutist, jumping from an airplane, has a vague idea of how long and where he lands. The parachute is uncontrollable, and only in skillful hands is it difficult to do a little control, and, generally speaking, it is freely carried through the air.

This property of a parachute requires a jump before landing and, if possible, immediately before a jump. The jump calculation is all the more important because most accidents do not land at the proper place. Therefore, accurate and fast calculation is very important.

The methods for calculating the jump, which are currently used, are time-consuming, laborious, require calculations and are not complete without pencil and paper. The calculation takes a lot of time and is certainly not suitable for use on an airplane just before the jump. The situation is aggravated when the jump is made with a prolonged opening of the parachute.

The device proposed according to the invention serves to calculate simple and long parachute jumps. In addition, the instrument, equipped with the sight, makes it possible to determine the landing place from the aircraft or to determine the moment of leaving the aircraft from a given landing point.

The device also allows for a correction for the weight of the parachutist.

The device consists of a housing 7 in the form of a square with two grooves 8 and JO for pointer 2 and 5, equipped with reticle, and a figure engine with a rail 6. On the case are scales corresponding to the height of the jump, the time of descent and the value relative to the wind.

Engine 2 is placed at the jump height (in the example shown in the drawing, at 1470 m). The slider 4 clamped by the screw 5 is guided under the arrow of the slider 2 by the size of the tightening, after which the screw 5 is clamped (in the drawing an example is shown with a tightening of 14 seconds). Slider 6 is mounted on the slider 4, rotated in the hinge 7. The slider arrow is brought under the corresponding wind speed plotted on the dial plate on the slider 4.

The correction for the weight of the parachutist is introduced by combining the wind speed not with an arrow, but with the corresponding mark on the bar. The position of the sighting engine 3 represents the value relative to the wind. Secure the screw of this engine.