MOTOR BOATS.

Dominion, Volume 1, Issue 110, 1 February 1908, Page 10

MOTOR BOATS.

'' ' ' i .;lilt;nciblff, r ;.'jlr l il'.f;.'fH. Relpb's fine fast' cruiser,' made a- very successful trip ' from Sydney ~ to. .Newcastle . and'i baOk Under. her own.'power recently, and while in Coalopolis etc..'which was Tlio 'trip is' described bv Mr,, Belplifas'.follows'Wo left Woolwicii it 3.15 a.m., and cleared the Heads At 3.50. Wo ; arrivetl.'At'.SJjeWastle,. and mako fast to tho wharf, having coriiploted tho journey of 62 knots in 4 hours lO minutes'. Wo'left iNMvcastle: r at (l (l,2o r .;arriving ' at'. 'Sydney at £&?.•,tajW.fi: 1 Wmp.ktivifei.'thfi ; distance' from, ' knots; in>3 hours '30 iininutesjvor: avorago■ of 18 knots, per l hour.; : During, .th?r whole trip tho engines vorketj-to i?fii:fect)fln,,iind only. stopped at' completion-^fsjqurney.-AVe-hdd ; teii: caseS-of ibbilziiie onf-hoardjt together with tho. usual i (Heavy, sea-going gear. •' Although confused :and. choppy seas were" met .Svitn,. the In-.viucihlo-.did not ship .ahythihg but spray, and i aft.,CTarffiiwajrnprovnd.-b'er class to be a. most ]seaworth.v„;and ,r.omforibablc sea boat. . 'l'ho ,total .distance eompd.'{luring the.'whole trip I is abont 170 nnlr<i t : constitutea a ,rtpcord at high speed. 1 understaiid tho record .Steaming time from. Sydney' to. Newcaistlo is | -1 !houfi,'Mh)ii(nntm,. / ;tncrefor(« wo ard, woli mtlr;'jnr , / 3'hours 80. minutes." *' I.; -riio .'HcgSfta 'authorities had inivited"3lr:Dnv'ios '.fe take Fairbanks up add ; gir ti ; S/i;^Wbi.tiibnbo was' unable to do !so, as"ihfe"champi6n"i'S'at present undergoing ;aij>'overhaul.'.:;lhiß"Was unfortunate, as an ' exhibition >from : .a boat of- her capabilities wbuld .haro-jlbeen. an .voye-opener for ,the Northerrtu sportsmen.However, Invinciblo cam.o-;to'She-rescue 1 , as'.stated above. '.. >By paroful "scientific experiments Dr.. Watson,"an'eminent English on'e>iicer,. „ has beyond doubt that wjMf mixture would fire : wjth niuclvgrfiater than it would .wlth.the a'dcuiinilator system, even W.lfeiiJsarriied.but. iii ' tjio inbsf - accurate mautension distributor arid ''singW eoif.VT.'Thisconclusively provos the magneto: 'to' produce tho superior re-•sultsr-andtti' have-ff greater range and higher economy!*. '• •• ' ' people' are of the erroneoiiST ripinion .'thatprovided tho coil pro-1 .(IwiJS'-a.'.'gjMiYk.-tha.t'is' snfficiont.-' PoMessors of thin-opinion have obviously not reflected on the-maTiteh '-•Tho-krengtb of the sparkthat you got from the coil depends upon t.bo ■cu i bio.:(wpacit};.,and thfi. pressure in tho cylindoi;.. w Afitn;a-'«oil. giving a'small sp4rk,'you may: get; good.'result's ~in smajl cylinders iind less satisfactory results in big eylinders— •jthat'. 1 . ,say,,'|an /efficiency' which will not be, tho maximum.;. The object in producing, a spark:Ls'to fir(£.ah,.explosive mixture in t-lio time, ~so ; Jis, to, get the maximum combustion and the, most rapid propagation of"tho | 'fiarnei'--' i TO get. this result you must ' pfdportioiV'the' siffitiv to the cylinder, for if yoK"t s orii)')ii r re y 'thl; S(iai;k with a sphere you wiil'a.t puce 1 see that the surface of .the spark Whicli - p'rotlitcc^'■ the'"firing varies according to ttTo;'.'cjilid 'c'P,tlife"i-adi\ig, so that if' you incr'etfab tlio yoii' Vwy largely tho propagatirin 'of t'io; flnnWj i; whicli' is proportional to the initial firing surface. . At tho sumb time, ybufmustj ntit iiJjvayH-.be satisfied, with.having uu'fqxtFa."rapid ti-enibler; you must, use a trt'nibl(!r...3uitiil)l«:for the maximum speed of th« .niotp.r,..;j : expenditure. of cij,rri!titi;::i produces smaller Fjwrks ip i .ths,7,seooii,dary , than, low Speed tremblejs.j-.thepeforfl-.rj'ou get a less, good effect-"froiij ittSTTATo use a trembler suitable; for ..a runiiiiig at 1800 revofiir tioiis on- a^iiKiioi^ running at 1000.to 1200 is. to "cause - your'motor v iy do neither itself, its maker,_ nor its user" justice.—"Au'tomobilo Magazine."