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Basic Helicopter Aerodyn 67-3 [Kõva köide]

  • Formaat: Hardback, 136 pages, kõrgus: 248 mm, Illustrations
  • Ilmumisaeg: 01-Dec-1990
  • Kirjastus: American Institute of Aeronautics & Astronautics
  • ISBN-10: 0930403673
  • ISBN-13: 9780930403676
Teised raamatud teemal:
  • Formaat: Hardback, 136 pages, kõrgus: 248 mm, Illustrations
  • Ilmumisaeg: 01-Dec-1990
  • Kirjastus: American Institute of Aeronautics & Astronautics
  • ISBN-10: 0930403673
  • ISBN-13: 9780930403676
Teised raamatud teemal:
This volume is an excellent introduction to the aerodynamics of helicopters. Basic Helicopter Aerodynamics provides an account of the first principles in the fluid mechanics and flight dynamics of single-rotor helicopters. The text is intended to provide, in a short volume, an introduction to the theory of rotary-wing aircraft for use by undergraduate and graduate students, while providing a detailed description of the physical phenomena involved. The text assumes that the reader already has some knowledge of differences between the fixed- and rotary-wing aircraft. Many diagrams, drawings, graphs, and representative sets of data augment the text.
Preface ix
Notation List xii
Units xvi
List of Abbreviations
xviii
Introduction
1(4)
Rotor in Vertical Flight: Momentum Theory and Wake Analysis
5(18)
Momentum theory for hover
5(3)
Figure of merit
8(1)
Momentum theory for vertical climb
9(2)
Vertical descent
11(2)
Complete induced-velocity curve
13(1)
Autorotation
14(1)
Summary remarks on momentum theory
15(1)
Complexity of real wake
16(4)
Wake analysis methods
20(1)
Ground effect
21(2)
Rotor in Vertical Flight: Blade Element Theory
23(14)
Basic method
23(4)
Thrust approximations
27(1)
Non-uniform inflow
28(1)
Ideal twist
29(2)
Blade mean lift coefficient
31(1)
Power approximations
32(2)
Tip loss
34(1)
Example of hover characteristics
35(2)
Rotor Mechanisms for Forward Flight
37(14)
The edgewise rotor
37(5)
Flapping motion
42(2)
Rotor control
44(5)
Equivalence of flapping and feathering
49(2)
Rotor Aerodynamics in Forward Flight
51(19)
Momentum theory
51(3)
Wake analysis
54(1)
Blade element theory
55(15)
Factors involved
55(3)
Thrust
58(2)
In-plane H force
60(1)
Torque and power
61(3)
Flapping coefficients
64(2)
Typical numerical values
66(4)
Aerodynamic Design
70(25)
Introductory
70(1)
Blade section design
71(5)
Blade tip shapes
76(2)
Parasite drag
78(5)
Rear fuselage upsweep
83(4)
Higher harmonic control
87(1)
Aerodynamic design process
88(7)
Performance
95(22)
Introductory
95(2)
Hover and vertical flight
97(2)
Forward level flight
99(3)
Climb in forward flight
102(1)
Optimum speeds
103(1)
Maximum level speed
103(2)
Rotor limits envelope
105(1)
Accurate performance prediction
106(1)
A world speed record
107(1)
Speculation on the really-low-drag helicopter
108(5)
An exercise in high-altitude operation
113(4)
Trim, Stability and Control
117(16)
Trim
117(4)
Treatment of stability and control
121(1)
Static stability
122(3)
Incidence disturbance
123(1)
Forward speed disturbance
124(1)
Angular velocity disturbance
124(1)
Sideslip disturbance
125(1)
Yawing disturbance
125(1)
General conclusion
125(1)
Dynamic stability
125(2)
Analytical process
125(1)
Special case of hover
126(1)
Hingeless rotor
127(1)
Control
128(3)
Autostabilization
131(2)
Index 133