Accession Number : AD0715453

Title :   Visual Approach Slope Indicator (VASI) System for Long-Bodied Aircraft.

Descriptive Note : Final rept. Jan-May 70,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s) : Gates,Robert F.

Report Date : DEC 1970

Pagination or Media Count : 37

Abstract : A comparative evaluation was conducted on two methods of modifying the standard VASIS for use for long-bodied aircraft operations. Modification was required due to the greater pilot eye-to-wheel height of the larger aircraft which placed these aircraft in a potential undershoot situation when the on-course signals of standard VASIS were flown. Thirty-four subject pilots flying a variety of aircraft, including the B-747 and C-5A aircraft, participated in the program. The aircraft were tracked with phototheodolite equipment, and the pilots completed questionnaires at the conclusion of each flight. The Three-Bar System, a modification consisting of an additional component of the standard VASIS, was a significantly better aid than the White-Wing System, a modification incorporating the use of white lights only (pilots flew combinations of bright-dim lights) adjacent to the upwind bar of the standard VASIS. (Author)

Descriptors :   (*PILOTS, LANDING AIDS), (*APPROACH INDICATORS, VISUAL SIGNALS), (*AIRCRAFT LANDINGS, VISIBILITY), MODIFICATION KITS, APPROACH LIGHTS, JET TRANSPORT PLANES, APPROACH

Subject Categories : Terminal Flight Facilities

Distribution Statement : APPROVED FOR PUBLIC RELEASE