Accession Number:

ADA207392

Title:

Verification of the Production Safe Flight Instrument Corporation OV/RV- 1D Stall Warning System

Descriptive Note:

Final rept. 17-25 Aug 1988

Corporate Author:

ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CA

Report Date:

1988-11-01

Pagination or Media Count:

44.0

Abstract:

A Safe Flight Instrument Corporation SFIC stall warning system and prototype normal acceleration g limit aural warning device were evaluated on an OV-1DC. Fifteen productive test flight hours were completed. Interchangeability of the SFIC stall warning system between aircraft was demonstrated by the good correlation of data between Grummans test on aircraft and U.S. Army Aviation Engineering Flight Activitys AEFAs test on aircraft. Grummans data shows adequate warning margin for LSSS on. There were, inadequate stall margins with LSSS not installed for dual-engine unaccelerated stalls, drop tanks only, and no-stores configurations. Single engine warning margins were inadequate, especially with the right engine operating near maximum power. Accelerated stall warning margine were satisfactory for all wing stores configurations. If the SFIC system is installed on operational aircraft without LSSS, the SFIC system should be adjusted to provide approximately 3 knots more warning margin for low power stalls. Keywords Stall warning indications Angle of attack Configurations Interchangeability Louvered scarfed shroud suppressor LSSS, Prototype, Warning margin.

Subject Categories:

  • Flight Control and Instrumentation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE