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rl SAY IAT TH . vp SEP PRA oH seulebsataiii tin ibn detoncia salad od Lo abdul 3 - rt gf, l-# KE REY ) 1 ' Course puts stress on canoeing safety A group of ten youngsters from Scugog area is off this week on a five-day canoe trip as part of an intensive two-week canoe safety course being offered by the Durham YMCA. Course director Eric Sigurdson said the first week of the course is devoted to canoe safety and proper handling of the craft which can be treacherous for the inexperienced canoeist in rough or windy weather. The course, which is open to youngsters between the ages of 10 and 15 years, follows safety standards set by the Canadian Recreation Canoe Association, and Mr. Sigurdson and his two assis- tants are qualified instruc- tors. Before setting out on the five-day canoe trip, all students must pass a series of tests based on the instruc- tion they received during the first week of the course. This is the first year the course has been offered in the Port Perry area, and response so far has been good. In Whitby, the courses are booked solid. The cost for the two-week course is $100 which includes use of canoes, paddles, life jackets, and all food, camping supplies and trans- portation for the five-day trip in the Georgian Bay area. "The students don't have to have any prior canoe experience', said Mr. Sigurdson. "All they need is a bathing suit, towel, and a few personal items for the canoe trip." "The stress is on safety and proper handling and all students must wear life jackets at all. times," he stated. Canoe safety and their proper use is being taken more seriously by the public these days, especially in light of a tragic accident a couple of years ago which claimed the lives of several young students from a private school who were on a - canoe trip in Northern Ontario. Instructor Eric Sigurdson demonstrates ""sweep" The YMCA program here in Port Perry this summer will include three more two- week courses, and Mr. Sigurdson says at present there are places available for any youngster who wants to take the course. Persons interested in more information on how to enrol in one of the courses should contact the Durham Region YMCA in Whitby at 668-6868. to student Kristy Armour of Port Perry. SELLY I REFS PV Greg Barnett of Uxbridge and Paul Carr of Port Perry practise "water- proofing' camping gear, an important part of any overnight canoe trip. the Vol.113 No. 36 Wednesday, July 18,1979 SECOND SECTION G.M. grant to study lubricant properties The properties of a thin lubricant layer (a film which may be but one ten-millionth of a metre thick) between two machine elements will be the object of a study made possible by a $28,500 grant from the General Motors Corporation to the Univers- ity of Waterloo, in Waterloo, Ontario, it was announced last week. The grant was allocated by the GM Research Laborator- ies to the Mechanical Engin- eering Department at the University of Waterloo to support efforts aimed at the development of a better un- derstanding of the interac- tion of engineering surfaces and of how this interaction is influenced by the thin inter- spersed lubricant film. "This understanding will greatly aid in the design of energy efficient machin- ery," said Donald F. Hays, head of th: Mechanical Research Department at the GM Research Laboratories. The study will center on what is known as the mixed or boundary lubrication re- gime--a lubrication situation which is not well understood but which contributes signifi- cantly to the friction and wear of machine compon- ents. This study will be an ex- tension of work now being supervised by Professors John Schey and Joseph Tev- aarwerk and will address itself to the geometry and kinematics of mating sur- faces and their effect on friction under heavily loaded conditions. Excessive friction may re- sult from the interaction of unlubricated surfaces in rel- ative motion, and this not only reduces the efficiency of the machinery but can also lead to premature wear. The introduction of a lubricant between the mating surfaces helps to reduce friction by providing a fluid film whose viscous properties create a load bearing fluid structure. Under certain operating con- ditions, the lubricant forms a film that totally separates the surfaces. This, unfortunately, is not always possible because there are many machine elements whose configua- tions and operating environ- ment do not promote this type of full film lubrication. Also, real surfaces are not perfectly smooth but, when examined are seen to be composed of peaks and vall- eys. Under certain operating conditions, peaks on one sur- face may penetrate the lub- ricating film and establish contact with peaks on the other surface. This condition leads to the friction forces which are characteristic of the mixed or boundary frict- ion regime and which contri- butes to power loss. The study by the group at the University of Waterloo will also include the role of material properties and lub- ricant characteristics on the frictional forces in heavily loaded machine elements, and investigation of the for- mation and breakdown of the extremely thin surface films and an assessment of the importance of surface ther- mal phenomena in the mixed film regime. Society Picnic The Lake Scugog Histori- cal Society Choir held their annual picnic at the Museum Church grounds on the island this past Sunday. Approxi- mately 35 members and their families enjoyed the beautiful day, buffet supper and an evening singsong. bonded tii aor iittala dain rishinnanid ad fins re nd okie irr