Accession Number:

AD0784134

Title:

Yaw Axis Stability Augmentation System Flight Test Report

Descriptive Note:

Final rept. 1 Jun 1972-30 Nov 1973

Corporate Author:

HONEYWELL INC MINNEAPOLIS MN GOVERNMENT AND AERONAUTICAL PRODUCTS DIV

Report Date:

1974-06-01

Pagination or Media Count:

111.0

Abstract:

The report describes the design and flight tests of a hydrofluidic yaw stability augmentation system SAS for an OH-58A helicopter. The design objective was to improve stability characteristics in yaw for all flight conditions from hover to 120 kn. The yaw SAS, which initially featured only high-passed yaw rate feedback, was installed in an OH-58A helicopter and flight tested in 1972. Performance at forward flight speeds was satisfactory but at hover, yaw rates were excessive. The system was then modified to add a straight-through yaw rate feedback term. Flight tests of this configuration were conducted from October-December 1973. Results were satisfactory.

Subject Categories:

  • Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE