Accession Number:

ADA629356

Title:

Wind-Tunnel Evaluation of the Effect of Blade Nonstructural Mass Distribution on Helicopter Fixed-System Loads

Descriptive Note:

Technical memo.

Corporate Author:

ARMY RESEARCH LAB HAMPTON VA VEHICLE TECHNOLOGY CENTER

Report Date:

1998-01-01

Pagination or Media Count:

252.0

Abstract:

This report provides data obtained during a wind-tunnel test conducted to investigate parametrically the effect of blade nonstructural mass on helicopter fixed-system vibratory loads. The data were obtained with aeroelastically scaled model rotor blades that allowed for the addition of concentrated nonstructural masses at multiple locations along the blade radius. Testing was conducted for advance ratios ranging from 0.10 to 0.35 for 10 blade-mass configurations. Three thrust levels were obtained at representative full-scale shaft angles for each blade-mass configuration. This report provides the fixed-system forces and moments measured during testing. The comprehensive database obtained is well-suited for use in correlation and development of advanced rotorcraft analyses.

Subject Categories:

  • Aerodynamics
  • Helicopters
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE