Aviall Product Catalog And Source Book Page 1127 Aircraft Lighting

ANTI-COLLISION LIGHTING SYSTEM WHELEN AIRCRAFT LIGHTING aviall ability aviall.com 1127 What is an Anti-Collision Light System? Five locations on the aircraft for anti-collision strobe lights, to comply to the light pattern requirements Position lights and anti-collision light distribution patterns requirements Fig. 1 One anti-collision strobe light mounted on the vertical fin will meet the minimum requirements on most aircraft. A half red and half white lens is recom- mended. Fig. 2 Two wing tip strobe lights that protrude beyond the wing tip, their light converging in front and back of the aircraft within 1200 ft. is an approved anti-collision strobe light system. Fig. 3 Enclosed wing tip anti-collision strobe lights, require a third strobe light on the tail or vertical fin, to fill in the required light envelope. This is an approved anti-collision system. Fig. 4 A fuselage mounted anti-collision strobe light system requires a minimum of two strobe lights to get the required vertical coverage. This is an approved anti-collision system. Radio Noise Suppression Whelen strobe light lenses part no. A428, A457A, A612 and the A402A are available with an advanced RF shielding technique that Whelen Engineering developed to reduce radio interference. When properly grounded to the aircraft structure, these radio shielded strobe light heads will reduce the radiated RF energy created by the trigger pulse as much as 15-17 dB. (To locate RF shielded parts, refer to Whelen Engineering's strobe light parts list.) A429 strobe light head uses the A428-D which is an RF shielded A428 lens epoxied into an A426 retainer. A470A can be radio shielded by replacing the existing lens with part no. A402A-D( ) color. A500A uses the A457A-D which is an RF shielded A612 lens epoxied into an A606 lens retainer. A650 strobe light head uses the A626-D which is an RF shielded A612 lens epoxied into an A626 lens retainer. Fig. 5 An approved anti-collision strobe light system must project light 360 around the aircraft's vertical axis. One or more strobe lights can be used. Fig. 6 An approved anti-collision strobe light system must project light + or - 30 above and below the horizontal plane of the aircraft. One or more strobe lights can be used. The + or - 75 projected light is required since July 18, 1977. Fig. 7 Approved light pattern in the horizontal plane. The anti-collision wing tip mounted lights must converge within 1200 feet directly in front and rear of the aircraft on center line. If the wing tip strobe light convergence is greater than 1200 ft. in back of the aircraft, a 3rd light is necessary.

Previous Page
Next Page