MOTOR BOATS.

Dominion, Volume 1, Issue 75, 21 December 1907, Page 10

MOTOR BOATS.

;/>'' '-(Br 'GASBDBEITOB:)'' - •

: Owners, of- motor .'launches-'will be-pleased-' to learn "that, the -marine-regulations in-rcr spect to launches carrying-;a. certificated, eit-;? giueer only applies to _boats-.plying' for .hire,, privately-owned pleasure launches iip. to 50 tons register being exempt >'ffpm : this"'-' rule;'All launches are, however, to carry at least two approved life buoys and u 'a lifo,vbelt_ Jopj every person'-on board, ■ and-also tho regular tion head and side lights. . Two :inoro launches- wero-ilast.,week added to the fast, increasing fleet of Port Nicholson motor .boats, j\lr: ! , G; Bqtljamley's, which was built -.by Messrs. Briiigins'and aiid' tho old half-fatfeF/'lturu," owned by- Messrs .Howard, and lfcar. 1 Hf!A: 'Mr. BotfitfiiilbJ's-?boat-is"2oft. long,, with 6ft: beam,'with a deck house running 'nearly, the full length, of ;the boat, .and presents a. yery'neat appearance water/ She came round from MartikVßay?; to the 'boaty harbour in ' a.-good north-east'er;'%ith a bigsea on, for .her .initial :spih and;a'cquitted herself very well,'showing a:,.v.ery fair pace against wind anil se'a':;; : 'Seping that she is' only fitted witlf'a :4JI-hip. : Wgine, -her •owner-, ought £o be very"well-pleased with the speed' 'that she develops, , SS ; The -"Rum", has not yet- had her,, trial spirij but -her 7£:h.p."double'cylinder .jingin'a in calnp-wajtCT ishe ought to; just" ahout keep pace with' anything fn -thV-liarlwur.' yA\!" ■' - . Mr. F..W I .'- Petlie'rielc 'is'leaving' to-tlay for a .fortnight's criiiso in tho. Collingwood district ifi tho "Dot." "Dot" 'Will'bo; . shipped'aboard far 'as Ne|spri;' and a start, will be made- from" there' oirSlpnK day morning-antl "all the' placos "of interest/on the line, as ~far ,north as Collingwpotl ' will. bol'visited.' Mrs. Potherick; will, pccom-. pany her husband for tho trip.W Messrs.. 'Downes, (2)',- Greenshields;: and' Bridgeware taking'the"''Nebla"'across ; to the .Felorus". Sounds next weqk and, intend _. r putting in"- a ; fOTtnight;.'exploring '.'the ■ spots and testing .the ;notcd v ;fishing„grounds'. in tho •'Sounds. ' ' ' ■ ' Mr. Bucholz is also taking the "Blotsoe" across to Pictonio spend the holidays. If-it was npt..fcr J tl)e...uiicert.ainty.;,'of i the...weatber.. in crossing the .think that alj the launches in the harbour would be oyer doing the Sounds during tlio 'holidays." .' * _

• INTERESTING ITEMS. V:" The; American 'flyer, Dixie, whith success-' fully comp.eted for the British International 1 \ Cup attained a great , speed in the course of somo £rials at the Jamestown Exposition re-" Cfintly.i A nautical mile was marked out by' ■ tho Government, and this was; covered; I .yith' the title, 'in 2min. 7 4-osec., equivalent.-to. '28;i68-knots. It will ho remembered .that in* tho Record .Mile Contest'of tho British Motor, ';i-Boat Club, Daimler ll's speed, under similar' condi^nsr<vWM;..«iual.;tfli ! >-!?8i346-r-lcnotß<'--pr (approximately) i-.Gth of a knot faster than

biA.e.- . • • -- •• ; ■ In a race for the long-distance championship of America, run on the Hudson River, Den and Ske'daddlo"ractid rieck and' n'6ck : from New York' to •I'oughkoepsie ,and back (116.3 . nautical miles). /Den iinisbcd ;50sec. ahead,' but. on measurement-time allowance, tho other boat would prbb'ably'.win.-p'Efrl feree." . Adequate and correct lubrication is'an ab-solute-essential to the proper performance of all machinery. .In motor practico it. is, jiot always', best, to endeavour to secure this by employing thick'oil," bccauso this is reduced to the, consistency of water through' being subject to the great .heat it is callc-d uponi to; encouiitor. For water jacketed, .motors an oil of medium viscosity, possessing; a fire test

'df--nbt-less~ than - 4ro"clegrces, Falir., should bo selected,, care,..lieyign taken that in addition to its resistance, ,it stay 011 tho piston rings and cylinder .walls'- despito tho thinning effect of gasoline,' vapours. Ordinary gas engino oils are jqfely satisfactory, whilo light coloured oils/do,pot givo tho results •that an oil .containing, full-bodied hydrocarbons will giye.Th'o.'.prdpcr, attention to this jiart of an ongino.alonp, will savo the loss on ;single. figured , i motprs (i ,-of fully one-eighth vhorsd.:pdwdr ! -.Svhich. saying rapidly increases .tp liprsd"prijypr as, the motors in'creaso in samo tiirie it will prolong tlio .life of. the .transmission in either big ~inbtors,;or little ones'.,-..On'thorough and pro;por, ■liibrication/depends : the life • of all motors.; , lV ;.i ' .'• / Advancing' .tho"jignftion - too:. much sets up ,strams;upbn'thp'>crarikshaft and -'engine generally, .becausojth'e; premature ignition causes tho;. charge, .to;!.bo fired •.boforo: tlio' upstroke is coqipleted. ,vThp putcomp* of this condition .of." affairs,' thqro. results, as. it were, tjieipiomehtunr df. the fly,Svhoer:and;;thq;'; ' That is :tb; trjes to 'drive tho piston ;down"'before it "h.is. completed its upstroko. Tho' best way to understand this is to imagjtio that the'ignition is sa -very much advanced that 'iKe ; cliargo is fired before the "upstroko is half completed. This is an extreme, case,j liQt,»occiif in-prac-tice',, "but- is-; simply given as assort ,of reduct'io Magazine."