E-Book Overview
International Technical Associates, Ltd. Upper Darby, Pennsylvania, 1983. — 175 p.
This study provides a detailed comparative insight into design and operational philosophies of Soviet vs. Western Helicopters. This is accomplished by examining conceptual approaches, productibility and maintainability, and weight trends/prediction methodology. Extensive use of Soviet methodology (Tishchenko) to various weight classes of helicopters is compared to the results of using Western based methodology.
E-Book Content
AD AlI
NASA Contractor Report 3580
AVRADCOM Technical Report 82-A- 10
A Comparative Study of Soviet vs. Western Helicopters Part 2 - Evaluation of Weight, Maintainability, and Design Aspects of Major Components
W. Z. Stepniewski International Technical Associates, Ltd. Upper DarbV, Pennsylvania R. A. Shinn Aeromechanics Laboratory A VRADCOM Research and Technology Laboratories Ames Research Center Moffett Field, California
Prepared for
Aeromechanics Laboratory AVRADCOM Research and Technology Laboratories Ames Research Center under Cortract NAS2-10062
National Aeronautics and Space Administration Scientific and Technical Information Branch 1983 9•-
-.
(
i'
page Preface List of Sjlmbols ..............................................
Chapter 1
Objectives . ................................................
1
1.2
Comparison of Weight-Prediction Methods ...........................
1
1.3
Selection of Helicopters for Comparison ............................ Evaluation of Component Design Aspects ........................... Rating of Helicopter Configurations by Tishchenko, et al .................
1.5
Chapter 2
,
Introductory Considerations
1.1
1.4
-
.v vii
9 10 .11
Comparison of Weight-Prediction Methods
2.1
Introduction ...............................................
12
2.2
Main-Rotor Blades ............................................
13
2.3
Main-Rotor Hubs and Hinges ....................................
23
2.4
rail-Rotor Group Weight Estimates ................................
29
2.5
Fuselage Weight Estimates ......................................
39
2.6
Landing Gear Weight Estimates ..................................
47
2.7
Drive System ..............................................
56
2.8
Fuel System ...............................................
69
2.9
Propulsion Subsystems .........................................
74
2.10 2.11
Flight Control Group ......................................... Summary Weights of Major Components ............................
79 89
2.12
Concluding Remarks .........................................
98
Appendix - Chapter 2 .........................................
102
*
Chapter 3 Component Design Comparison Ao6a eon Fo0 lg
Rl
3.1
Introduction ...............................................
108
1
3.2
109
)TZ9 AlD
3.3
Relative Weights of Major Components ............................. Relative Major Component Weight Trends for Various Configurations .........
3.4
Main:enance Comparison
3.5
Evtluation of the Rotor System Design ..............................
150
Appendix - Chapter 3 ........................................
16
Soviet and W