Theory Design Air Cushion Craft 2009 Part 1 docx

... damage Total Damaged 41 31 19 5 18 21 5 14 0 Sinking 2 3 1 8 - 1 - 15 Total 43 34 20 13 18 22 5 15 5 16 Introduction to hovercraft Fig. 1. 14 British sidewall hovercraft HM- 218 in operation ... period, and later to 21m, to become the HM-2 21 (Fig. 1. 18). Contents Preface xi Acknowledgements xiii 1. Introduction to hovercraft 1 1 .1 Hoverc...

Ngày tải lên: 11/08/2014, 18:20

... approxi- mately h c /2.5 then h = 0.05 h c . Thus Air cushion wave-making drag 91 2.0 1. 5 1. 0 0.5 . a'/a=0.90 1 1 1 2a' 1 1 Fig. 3.6 Cushion wave-making drag ratio as a function ... drag on accelerating craft. [ 21] 2.0 1: c/g=0 2: c/g=0. 3:cA?=0 .10 a: cushion length b: cushion beam c: acceleration d: water depth l/(2Fr) Fig. 3 .10...

Ngày tải lên: 11/08/2014, 18:20

... interval Craft model Skirt drag coefficient June 19 68-June 19 69 Sept. 19 67-March 19 69 March 19 69-June 19 70 July 19 70-June 19 71 June 19 73-Feb 19 75 19 73 -19 76 N102 N300-02A N102C N102L N300-02B N500 ... water 11 9 X9.8N 16 000 14 000 12 000 10 000 8000 6000 4000 20 40 60 80 10 0 12 0 14 0 v(km/h) 2000 20 40 60 80 v(kn) Fig. 3.33 The drag an...

Ngày tải lên: 11/08/2014, 18:20

... width W 4 fi c lJB e PA PC Q KG Z b,s a ft 5, t m m kgf/m N/m 2 m m deg deg m 13 .7 13 .2 3.5 3.77 19 .93 2630 0.00757 1. 27 0 .15 60 89 0 .12 15 .95 15 .2 3.5 4.34 17 . 31 2630 0.00658 1. 27 0 .15 60 89 0 .12 18 .20 17 .3 3.5 4.94 15 .38 2660 0.00570 1. 27 0 .15 60 89 0 .12 correct, ... T bl Units km/h N/m 2 mVs m m m m 30.67 2690 23.65 0.402 0.0389 0 .15 35 0 .15 35 42.90...

Ngày tải lên: 11/08/2014, 18:20

... Chinese and Western ACVs Craft identification Nationality Craft type 711 -IID China ACV 7 210 China ACV 716 -11 China ACV 722 -1 China ACV SR.N6 UK ACV SR.N4 UK ACV AP .1- 88 UK ACV Rudder installation Vertical Jetted Vertical ... deformation in SES air cushion 19 7 Fig. 5.8 Wave amplitude due to an ACV on shallow water in/off air cushion. 5.3 Water surface de...

Ngày tải lên: 11/08/2014, 18:20

... stabilizers and air propellers. 1: yawing moment, hull only; 2: yawing moment, hul. oroos. fins. -10 00 10 00 Y(m) 7(m) -10 00 Time(s) Rudder angle // v, 0 _1 45° 1. 0.02 31. 3kn > ;1 0° 2. ... . 2/3 + 1/ 3 r b /r c Three-dimensional 1 [ 1 Two-dimensional _ f 1/ 2 +1/ 2 r E /r c Three-dimensional 2 [1 Two-dimensional _ [ 1/ 3 + 2/3 r E /r c Three-...

Ngày tải lên: 11/08/2014, 18:20

... 8 .16 shows the pitch response y/^ to the wave amplitude as it varies with 298 Motions in waves 1 1 *-„ ~G — — -Z r «_ l " — r ] — *" 1 ~c~ ^p V _ 1 X (b) Fig. 8 .11 ... rectangle. 3. Changes of air density and cushion pressure in the plenum chamber (air cushion) are considered to be adiabatic, but the outflow of cushion air into...

Ngày tải lên: 11/08/2014, 18:20

... waves 1. 0 riii ^ 1. 5 2.5 3.5 4.5 5.5co f 1. 5 2.5 3.5 4.5 5.5w e 1. 3 /.D :0 40 3.3(0 e .— i.J ^ J J.J t.J ^•^"'f /TT 0.6 1. 0 1. 4 1. 8 2.2ca e -JlJg 0.6 1. 0 1. 4 1. 8 2.2w f V/ r /s - ... Stern cushion cushion From take-off course to post-hump 15 00 15 00 14 00 14 00 Cushion pressure steady, speed of 40 kph trim approx. +5° Running...

Ngày tải lên: 11/08/2014, 18:20

... cabin Bridge/wheelhouse Hydrofoil Built 19 60 China 11 8 10 5 -10 7 11 0 Hydrofoil Design China 11 8 73 80 63 717 C SES China 83 80 89 719 SES China 12 2 85 98 80 719 -11 SES China 11 4 73 80 65 711 -IID ACV China 95 Griffon ACV UK 10 2 85 AP1.88 ACV UK 88 88 78 W ... (%) (%) 6408 (for full-scale craft) 15 33 (for models) 95 14 (for models 3970 12 700 10 900 1 7...

Ngày tải lên: 11/08/2014, 18:20

... fan; (b) air duct; (c) air clear- ance (under-skirt gap). 418 Lift system design 0 .10 0. 01 £ 0.0 01 SRNlo SRN5 H e 0.05 SES -10 0B 10 10 0 10 00 Craft weight (tonnes) 10 000 Fig. 12 .10 Relative ... weight (t) 10 0 10 000 10 0 10 000 10 0 10 000 Opening inlet, integrated fan system (on craft SR.N6, SR.N4, BH.7) 0. 016 0. 014 0. 012 0. 011 0...

Ngày tải lên: 11/08/2014, 18:20