SU427431A1 - Device for protecting cawl of aircraft against damage by lightning - Google Patents

Description

(54), DEVICE FOR PROTECTION OF THE AIRCRAFT OF THE AIRCRAFT AGAINST DAMAGE BY LIGHTNING

one

The invention relates to radio engineering. The device can be used on aircraft., Devices with a nose dielectric fairing that protects the radar antenna and course antenna landing system from mechanical damage.

A device is known for protecting the aircraft spinner from being destroyed by lightning, comprising several conductive tires arranged along the outer surface of the nose dielectric fairing.

The objectives of the invention are to improve the groozavditnyh properties and the removal of static electricity from the surface of tires.

The proposed device is characterized in that the tires are made with cuts, which are sharpened and connected through resistors; while the tires are insulated from the spinner dielectric plates.

FIG. 1 schematically shows this device, side view; in fig. 2 - the same, front view; and Fig, 3 - section A-A, {Fig, 1); Fig, 4 - section

The device comprises current-conducting busbars 1-6, removable heat-resistant dielectric plates 7, fastened with fasteners to the nose dielectric fairing 8, resistors 9.

A course antenna 10 is installed on the inner side of the fairing. An antenna 11 of the radar station is located inside the fairing. Tires 3-6 consist of two sections and b. The ends of the tires are attached to the metal

0 a border 12 of the flap 8, which is electrically connected to the fuselage 15 of the aircraft by the locks 13 and the flexible bus 14.

So that the fairing is not destroyed

5 (not sminals) fasteners for mounting tires and during operation, they are attached to the fairing through dielectric bushings 16, pre-glued throughout the thickness of the walls

0 fairing. In order to preserve the radiation patterns of the course antenna 10 and the antenna 11 of the radar station of the bus 3-6, are made in mm length; plot a should be equal to 200 i5 mm.

five

The length of tire 1 is chosen to be 1250 ± 5 mm, and tires 2-950 ± 5 mm. All tires are made 12 mm wide. To reduce the aerodynamic drag and completely remove the lightning current, the height of tires 0 is selected in the range of 4 to 8 mm. Angle ((“. Chosen to be 60”. Its choice is based on antenna type 10. To divert the current of molria and remove static electricity from the surface of the area b to the section a of tires 3--6 f and then to the fuselage 15, The bus section is made in the form of arresters, their ends are tapering at an angle of 90 and made with a gap of 2 to 3 mm, providing a breakdown voltage of no more than 1 kV. remove static electricity from site b; the ends of the tire sections at the cut site are self-gated with a high-resistance resistor; 9 Niemi 100 ohms and 2 watts. Current lightning and static electricity is discharged on fuselage 15 through the metal edging 12 radome 8, the locks 13 and the flexible bar 14. In order to protect the nose cowl of burn through when current proho kdeni

Claims (1)

/ lightning through the gap between sections a and b of tires 3-6 are replaceable heat resistant dielectric plates 2 t thick, insulating the fairing from these plots at the point of clearance "Formula of the Invention located along the outer surface of the nose dielectric strap, which is different (that, in order to improve the lightning protection properties and removal of static electricity from the tire surface, the latter are made with Ezami, the ends of which are pointed and connected one through the other 1-1 through resistors, and the tires are isolated from the flap by means of dielectric plates.