Theory Design Air Cushion Craft 2009 Part 7 ppsx

... in Figs 7. 2, 7. 9, 7. 10 and 7. 14. They are generally a series of almost circular trunks inflated iop b , extended to between 60 and 80% of cushion depth. For deep cushion craft, ... the cushion pres- sure acting on the stern skirt is uniformly distributed, may not be accurate, particu- larly in the case where craft are running on a water surface....

Ngày tải lên: 11/08/2014, 18:20

... particulars for three SES type 71 7 Item Symbols Dimensions 71 7 71 7A 71 7C Craft weight Cushion length Cushion beam Cushion lib ratio Cushion pressure length ratio Cushion pressure Flow coefficient VCG Bow ... 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 0.0 075 7 1. 27 0.15 60 89 0.12 15.95 15.2 3...

Ngày tải lên: 11/08/2014, 18:20

... when the craft is running in high seas and the vertical motion of the craft is very large. In such a case, we can consider air leakage gap, air cushion pressure and air flow rate ... along the longitudinal craft axis. Particularly when the craft is running in high seas, wave perturbations on the craft are severe and this causes local air le...

Ngày tải lên: 11/08/2014, 18:20

... for subsystems 1 975 Delivery to naval test base 1 977 Inspection of systems v 1 976 -19 87 Craft bollard test " • 1 978 Craft trial 1 978 Crew training 1 977 -1 978 Various warfare ... turbines 16.5 General design requirements 16.6 Machinery space layout 16 .7 Systems and controls 16.8 Operation and maintenance References Index 4 87 4 87 5 07 515 520 5...

Ngày tải lên: 11/08/2014, 18:20

... equivalent to (=p J L ' 7 / / / / 7 7 T /// ////// Fig. 2.24 Heave motion of a hovercraft model on rigid surfaces. SO Air cushion theory where K 3 = vl(2 P M°- 5 ... wave-making drag due to air cushion, (N), p c the cushion pressure (N/m ), B c the cushion beam, (m), l c the cushion length (m), p w the water mass density (0.10 177...

Ngày tải lên: 11/08/2014, 18:20

... years Time interval Craft model Skirt drag coefficient June 1968-June 1969 Sept. 19 67- March 1969 March 1969-June 1 970 July 1 970 -June 1 971 June 1 973 -Feb 1 975 1 973 -1 976 N102 N300-02A N102C N102L N300-02B N500 ... weight Cushion pressure m / m B c m h s m h k m B^ m fi. deg a deg ft N W N/m : p c 1.61 0.35 0.056 0.042 0.05 0.015 65 89 156 290 approx. 2 0...

Ngày tải lên: 11/08/2014, 18:20

... deformation in SES air cushion 1 97 Fig. 5.8 Wave amplitude due to an ACV on shallow water in/off air cushion. 5.3 Water surface deformation in/beyond SES air cushion on calm ... the craft model 71 7. 2. Sidewall wave-making effect on dynamic trim and water surface elevation may be neglected. 3. The air cushion is assumed to be incompressible, i...

Ngày tải lên: 11/08/2014, 18:20

... with two air ducts from the air outlet of the fan have been carried out in the towing tank. Part of the outflow may be led directly into the cushion and another part via air ducts, ... the craft of 5 t (7 C = 10), i.e. the effect of compressibility of cushion air can be neglected, but K p = 41% for the craft of 400 t, which means that in...

Ngày tải lên: 11/08/2014, 18:20

... 1960 China 118 105-1 07 110 Hydrofoil Design China 118 73 80 63 71 7C SES China 83 80 89 71 9 SES China 122 85 98 80 71 9-11 SES China 114 73 80 65 71 1-IID ACV China 95 Griffon ACV UK 102 85 AP1.88 ACV UK 88 88 78 W ... transverse metacentric height for several Chinese SES Type of craft 71 7C 71 1-III 71 9G 71 7-III 71 3 Year constructed Cushion length/beam rati...

Ngày tải lên: 11/08/2014, 18:20

... 3 570 29.80 0.00 67 HM.218 UK SES 14.39 70 .19 27. 30 3390 21.50 0.00412 HM.221 UK SES 17. 44 85. 07 37. 20 3339 26.80 0.004 27 713 China SES 17. 5 87. 30 28.00 3200 50.00 0.008 71 1-IIA China ... 6.40 1290 51 .70 0.02 17 SR.N6 UK ACV 14.8 78 .00 10.00 1280 75 .10 0.0213 SR.N4 UK ACV 39 .7 780.00 200.00 2 570 453.40 0.00906 JEFF (A) USA ACV 28.0 335.00 1 57. 00 4690...

Ngày tải lên: 11/08/2014, 18:20