IChO 2009 prep prob theory

... Preparatory Problems Problem Authors Stephen Ashworth University of East Anglia Jonathan Burton University of Oxford Jon Dilworth University of Oxford Nicholas Green University ... constants and integrals Mass spectrometry: molecular ions and basic fragmentation Preparatory Problems Theoretical problems Problem Dating moon rock The age of rocks collected from the moon on the Apollo ... neithe...

Ngày tải lên: 05/11/2016, 16:58

... • Craft trial Crew training Various warfare systems trials, which included tests in Alaska, in Arctic conditions 19 70 19 72 19 71- 1975 19 72 -19 76 19 75 19 77 19 76 -19 87 19 78 19 78 19 77 -19 78 19 77 -19 84 ... ACV/SES take-off Effect of various factors on drag 10 4 11 1 11 5 11 5 11 7 12 1 12 4 13 0 Stability 4 .1 Introduction 4.2 Static transverse stability of SE...

Ngày tải lên: 11/08/2014, 18:20

... SES 0.25 0 .30 0 .38 0 .39 8 0.28 0.495 0.75 0 .30 0 .32 0. 63 ADAO 225 83 ADAO 225 83 ADAO 225 83 AIAA 73- 318 AIAA 73- 318 AIAA 73- 3 18 AIAA 73- 3 18 AIAA 73- 3 18 ADAO 225 83 Marie Report 10 3. 5 Aerodynamic ... from the cushion (m /s), Q{ the inflow rate into the cushion (m3/s), Fthe cushion volume (m3), m the mass of air in the cushion (Ns2/m) and p.d the air density (...

Ngày tải lên: 11/08/2014, 18:20

... (4. 2) (4. 3) (4. 4) where Qs is the air leakage from under the stern seal (m /s), Qb the air leakage due to bow trim (m /s), and Qsw is the air leakage under the sidewalls Flow rate equation: Air ... the static transverse stability 143 144 Stability Table 4. 1 The leading particulars of two craft models Name Units Nomenclature Model No Model No Cushion length Cushion beam Heig...

Ngày tải lên: 11/08/2014, 18:20

... m m m 26 .5 2813 5. 1 15 0 .52 54 0.2066 0.086 0.086 33.1 2789 5. 1 15 0 .58 23 0.2008 0.0 858 0.0866 44.2 55 .2 2776 2787 5. 1 65 5. 15 0 .59 52 0 .55 99 0.1986 0.2006 0.0868 0.089 0.0868 0.089 SES transverse ... ft 5, m m deg deg m 717 717A 13.7 13.2 3 .5 3.77 19.93 2630 0.00 757 1.27 0. 15 60 89 0.12 15. 95 15. 2 3 .5 4.34 17.31 2630 0.00 658 1.27 0. 15 60 89 0.12 717C 18.20...

Ngày tải lên: 11/08/2014, 18:20

... (rolling) of craft Mxg= WhianO (6. 18) where /z'is the metacentric height of the craft on cushion (m) and Wihe craft weight (N) The differential equations of motion Substituting equations (6. 2)- (6. 18) ... stability of ACVs and air cushion platforms considerably Figure 6. 6 shows guide wheels in operation on an ACV Air propulsors used for manoeuvring Steering by differential...

Ngày tải lên: 11/08/2014, 18:20

... are shown in Figs 7. 2, 7. 9, 7. 10 and 7. 14 They are generally a series of almost circular trunks inflated iopb, extended to between 60 and 80% of cushion depth For deep cushion craft, inflated cones ... the cushion pressure acting on the stern skirt is uniformly distributed, may not be accurate, particularly in the case where craft are running on a water surface Cushion air...

Ngày tải lên: 11/08/2014, 18:20

... be written as (8. 36) 287 288 Motions in waves where Wis the craft weight (N) and Ig the moment of inertia of craft in roll (Ns m) The suffixes c, s, sw, j in the matrix represent cushion force ... the cushion plane is simplified as a rectangle Changes of air density and cushion pressure in the plenum chamber (air cushion) are considered to be adiabatic, but the outflow of cush...

Ngày tải lên: 11/08/2014, 18:20

... the towing tank Part of the outflow may be led directly into the cushion and another part via air ducts, the bow/stern bag and through into the air cushion The distribution of air flow can be ... the change of air condition in the cushion complies with Boyle's law, i.e PV = constant, in which P represents the cushion air pressure and V the cushion volume In the case wh...

Ngày tải lên: 11/08/2014, 18:20