An Experimental Investigation of High-Speed Rotorcraft Drag

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Abstract:

An experimental investigation was carried out to determine the effect of subsonic Mach number on the drag characteristics of a high-speed wingless and winged helicopter when equipped with two different rotor head fairings. A simulated unfaired rotor head was provided as a basis for comparison. Test were performed using a 19th scale model of a 60,000-pound class helicopter design. Data acquired included gross model force and rotor head force data, wing and pylon surface pressures, and tuft photos.

Author(s):
Linville, James C.
Author Organization(s):
UNITED TECHNOLOGIES CORP STRATFORD CT SIKORSKY AIRCRAFT DIV
Descriptive Note:
Final rept.
Pagination:
0215

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
SER-50713, USAAMRDL-TR-71-46
Contract/Grant Number(s):
DAAJ02-70-C-0018
Task Number(s):
1F162203AA4102
Project Number(s):
DA-1-F-162203-AA-41
Monitor Series:
TR-71-46, USAAMRDL
 Subject Terms
Joint Capability Areas:
JCA_8_Building Partnerships; JCA_1_Force Support; JCA_5_Command and Control; JCA_3_Force Application; JCA_1.2_Force Preparation; JCA_6_Net Centric; JCA_3.2_Engagement; JCA_8.1_Communicate; JCA_8.2_Shape; JCA_1.2.6_Concepts; JCA_5.3_Planning; JCA_6.1.2_Wireless Transmission; JCA_6.1.3_Switching and Routing; JCA_8.2.1_Partner with Governments and Institutions
Modernization Areas:
Fully Networked C3; Autonomy
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*HELICOPTERS, VELOCITY, TEST METHODS, AERODYNAMIC LOADING, DRAG, WIND TUNNEL MODELS, SUBSONIC CHARACTERISTICS, SCALE, FLOW VISUALIZATION
Field(s)/Group(s):
Aerodynamics, Helicopters
Keyword(s):
HELICOPTERS
Report Date:
1972 Feb 01