Static and Dynamic Response of a Design of Differential ... - aerade

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9 Q r rl '2 pick-up chamber volume LIST OF SD53OLS (COXTD) radius of connecting pressure tubes T w w w 2 a distance from inlet holes to the instantaneous centre of rotation Rs R1 R2 radius of hemispherical head acoustic resistzmce of pressure lines acoustic equivalent of the tiphmgm mechanical resistance S Laplace transfom parameter t time variable u.n.f. undamped naturzl frequency U free stream velocity v pressure registered by pick-up v pressure at yawmeter inlet holes vO Input pressure amplitilrle zq ,Z& equivalent acoustic impedances z, LS+X 1 1 1 L2s + n2 + p 1 qE incidence in plane of holes forming roll datum incidence normal to plane of holes forming roll datum phase angle acoustic damping factor = 5 mechanical damping factor = - w2 -5- wl
3 Superscriots . L at Other suffices LIST OF smu (CONTD~ dynamic viscosity of air in pressure lines incidence of yawmeter axis to the free stream nominal angular 3ocation of pressure holes relative to yaxmeter axis AC'CUCJ location of ir.Z.vidual holes air ?ensity in free strean air density in pressure line t3.m lag roll angle 9 + er2 ZJ~ x forc&rg frequency 2% x acoustic u.n.f. 2X x mec~ical u.n.f. Laplace operator form E manufacturing error F in flight conditions I indicate cl T in xind tunnel conditions -6- 00 ( i.e. 7 = s ve-st at > 0
Page 1: c. Pi.$-lj 4 I4 A.R.C. TechnIcal Re
Page 5 and 6: List of Syrdmls 1 Introduction 2 Te
Page 7: 3 a *I *2 c1 c2 a.n.r. g(s) G(S) i
Page 12 and 13: This type of instrument has the dis
Page 14 and 15: P = Pa-c y (Po - ps) sin*$ where ps
Page 16 and 17: 3-$ calibres behind the nose in acc
Page 18 and 19: which zmounw ?;o assvr;lin~ thzt si
Page 20 and 21: where the factor 0.22, applicable t
Page 22 and 23: In the present c&se z, = LqS + RI z
Page 24 and 25: The value for v is given by the dif
Page 26 and 27: a = speed of sound in air in the tu
Page 28 and 29: is thus reduced to the determinntio
Page 30 and 31: corresponding to a maximum volume c
Page 32 and 33: would be always m the same sense. T
Page 34 and 35: well, then If the pressure, ppit, f
Page 37: Effect of inaccurate pressure hole
Page 40 and 41: Thus the reqtianent is satisfied pr
Page 42 and 43: &thod 2 Alternatively we may use eq
Page 44 and 45: 4.0.- 3.! j- 2 15 3. O- 2, 5- 2. o-
Page 46 and 47: t----PLANE 1 CI I I I I I I I I I -
Page 48 and 49: 90 p. : STAGNATION PRESSURE FEWIN A
Page 50 and 51: 35 30 AP P, 25 25 3 FIG 9 (b) 0, =
Page 52: VO- I.0 ‘5 = ACWSTI~ DAMPING FACT
Page 55 and 56: 1 , FIG 15. PRESSURE RESPONSE OF YA
Page 58 and 59:
FIG 18 TIME LAG OF INTERIM (LONG TU
Page 60 and 61:
oo7r-- I 0 06 I ,c I 0 05 - 004 *P
Page 64:
0 Crown Copyright 1958 Pubhshed by
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Static and Dynamic Response of a Design of Differential ... - aerade

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