| OCR Text |
Show OUTSTRIPPING THa WIND. An IllmtrstloB t lluw Yacht Mmy A. enmiillth Thlt teal. Kvery yachtxinaii knows that a ship can nail faster than the wind: that is to say, If the wind Ik blowing ten knolt an hour, a ship may be making twelve or fifteen knots an hour. Now, It is obvious thai if tli ship I" sailing straight before the wind it cannot, at tho utinott, travel faster than the wind (Half Is blowing as a matter of fact, It will travel much more slowly. If, on the other hand, the ship U ailing ail-ing n,t an BDglo with the wind, it seems fit hVt sight that the wind must act with Imss eKeet Jhan before, but a" n matter of fact tho ship not only sails more ipilckly than before, but more quickly than the wind Itself It-self Is blowing. Let us consider the dltllculty In the light of tho following experiment: I'laco a Imll at ono sldo of the billiard table, and with the cue, not held lu the ordinary manner, but lengthwise from end to end of the table, ta-ble, shove the ball noroxi the cloth. The cue here rcpiespiits (ho wind, and tho ball the nhlp sailing directly linrorc Hi the ball of couiso travels at the aiime rate as tho cue. Now, suppose a groove In which the ball may roll be cut diagonally across the tabic from one corner pocket to the other. I f the ball be now placud at one end of the groove and the cue held horirontally, parallel with the long ldes nnd moved forward aero tho width of the table as before, tho ball will ttttvcl nlong the groove (and along the cue) diagonally diag-onally neruss thu table In the same time as tho cuo tubes tu imito ncroM the Width of the tabic This Is tho case of thu ship alllpg at an nuglc with the dliccltou of the wind. The groove In coiibidrrubly longer than tho width of the table. iure then double as long. In fact- T'lM Nil. thrrc-foru, travels much faster ttyin theu which iojpels l. since It covers more than donbj the dJDlauce In the same time. It Is In ITfjuly t))e same utiinuer that a tacking t)lp ll enabled to tall faster than thu wind. ... - |
