THE TORONTO SOCIETY OF MODEL ENGINEERS

VOL 36 No.10

WEB SITE: www.tsme.ca                           TSME CHAT LINE: tsme@yahoogroups.com

 

Don’t miss our last meeting of the 2005/6 TSME season - come to our next meeting on –

 

 

FOR THE EVENING’S PROGRAM, YOU’LL BE HEARING FROM:

 

Our guest AL RUTKE, invited by JOHN CHAPPELL, will talk about Laser Cutting

 

RON MELVIN – a Picture Report form this year’s NAMES, and also some other TSME pictures

 

BILL HUXHOLD will talk about Form Cutters, how to make and use them

 

An AUCTION: of Model Engineering tools, books etc. Some of the items will be from Bill Sanders Estate (see below) Please bring anything in that you no longer want and that you think might be of use to a fellow member. TSME would like a 10% “commission” (unless of course you wish to suggest more!)

 

And if you have a project you are currently working on, or recently finished – please bring it along and we will do all we can to fit your item into the program.

 

Please use the new TSME SUGGESTION BOX. Write down what you want to see more (or less) of; program ideas; items for sale (or wanted) to put in the modeler, or any comments or feedback you wish.

 

   WHAT’S UP & COMING : MEETING DATES @ 1001 Queen Street. June 9

 

GOLDEN HORSESHOE LIVE STEAMERS open days: 27, 28 May, 25 June, 2 July, 30 July, 20 August, 10 September, 1 October

25 JUNE: OMLET – Locomotive efficiency trials – in Hamilton, as in past year’s, at the Golden Horseshoe Track, at the Steam Museum. 11.00am to 4pm

 

If you have a project you are currently working on, or recently finished – please bring it along to show, if you wish, and if it works, then feel free to demo it working. Bring your family and friends !

 

LOCATION: BY KIND PERMISSION OF THE RICHMOND HILL LIVE STEAMERS – at their track site at 15922 McCowan Road. On the West side of McCowan Road, North of Aurora Road

DIRECTIONS: Coming from the north, south or west – take 404 to Aurora Road – go east to McCowan, then North on McCowan. From the east, take the same route, or up Hwy 48 to Aurora Side Road, go west to McCowan, then north on McCowan.

What’s on site: 7 ¼” and 5” (incomplete circuit) gauge ground level tracks. Raised 4 ¾” and 3 ½” gauge tracks. GERRY REED will bring along coffee, soft drinks and some treats. Bring you own chairs, and food and refreshments, if you wish.

 

TSME/TLS EAST END PICNIC: - SATURDAY 9 SEPTEMBER (NO Rain Day). 10.00am to 4.00pm. At BOB ALLIN’S in Orono (same location as last year’s. Locos will be running on the 7 ¼” ground level track.  There will be tables for your models – so bring them along. Bring your family, friends and chairs to sit on. Corn, Hamburgers and Hot Dogs as well as pop and coffee will be available. DON”T MISS THIS EVENT – it was most enjoyable last year, and it gets better every year!

 

 

 

 

 

We are sad to learn of the death of BILL SANDERS, which occurred sometime in March this year. Bill was a longtime employee of Orenda Engines and was involved with the very advanced Iroquois engine destined for the Avro Arrow in the 1950’s. Bill had been a member of TSME since late 1990. He had completed a Stuart Double 10 Vertical engine and was working on Horizontal engine from a kit he bought in USA. We offer our condolences to his family, and close friends.

 

MAY MEETING - IN CASE YOU MISSED IT

GERRY REED enlightened us with a description of Edge Finders and how to use (and misuse) them: best to fix in a collet and run at relatively high speed and feed slowly up to the part to be located. As soon as the Edge Finder “jumps”, this indicates the setting. Don’t forget to compensate for the diameter of the Edge Finder. A pointy ended Edge Finder is used to locate a centre-punch mark for drilling. Wigglers were used before DRO’s or dial indicators, and were used in the lathe to centre a piece in the 4 jaw chuck. They are still good for this: pointed end into the part, other end in the tail stock – and adjust to centre using a dial indicator to zero run out.

BILL HUXHOLD brought in many examples of collets and step chucks and explained their use. The step chuck, whether internal or external holding, are best made to suit a specific job. The closer piece has a taper to close the chuck around the part to be held. The chuck is split with, generally, 3 slots to allow closing and gripping around the part. There are expanding and contracting collets – either type being the most accurate way of holding bar stock.

CHARLES DUERDOTH had a 100 year old Gadget to explain its use. Charles started by stating that medieval kitchens in castles and stately houses of the gentry were usually 2 storeys. Many very large roasts were cooked in those days and the high kitchen enabled a ceiling mounted pulley over which a rope with a weight was hung. The rope and the lowering weight drove a rotisserie. Speed was controlled by a resistance air fan. These were devised by the engineers of the day – the blacksmiths. The weight would have to be raised about every half hour. These devices superseded the hand driven rotisserie. Smaller home owners could not afford to have the high ceiling kitchens, so a device was contrived, driven by the weight of the meat suspended from it, and able to reverse every several turns: rewinding about every half hour. Charles’ Gadget was one of these – now some 100 years old – and still working – as he ably demonstrated (but with a weight, rather than a roast).

DAVE SAGE showed his Atkinson Cycle Engine. The aluminum flywheel had been cast in Jim Small’s foundry, as were some other parts. The engine is unusual in that all 4 stages of the (compression-ignition) cycle are achieved with one rev. of the flywheel. Dave mentioned that the location of the pedestal and the cylinder is very critical for smooth operation. He intends to experiment with powder coating the steel cylinder and colour anodize the aluminum

parts.

JEFF KINGMA showed the start he has made on parts for a 1/12^th scale Hand Shaper from a kit from

PM Research. The kit came with all castings and gear material, plus a good set of drawings. Jeff said that

the T-slots he has to cut in the table are only 1/8” wide with a neck 3/32” wide – he’ll adapt a 1/8” dia. cutter to do this. Although the drawings are for a manual drive, Jeff will add a set up for line shaft drive from a small motor.

RICHARD TROUNCE talked about CNC milling using the Sherline Mill. This CNC Mill comes with computer, and preloaded software. You must supply your own monitor. Total for all this – about $4500.00. If anyone wishes to delve further – check the Sherline website: www.sherline.com/cncinstructions.htm to download the manual (some 50 pages). The manual explains how to make a few parts using the G code software. It explains what you have to do, how to write the code and will draw your part on the monitor, enabling you to check before machining starts. Richard recommended that this system is best used for more complex parts, and which require firstly CAD drawings made to provide co-ordinates for the code. He showed a couple of parts he had made using this system – an expansion link, and a coupling rod with 80” radius top and bottom sides – not possible to achieve with any accuracy any other way. The Sherline is a light machine so cuts are limited to about .008” to .010”.

 

FOR SALE, WANTS OR SWAPS:

 

WANTED: by RON ALLIN. Finished, or part finished, boiler, suitable for running a twin cylinder Stuart 10D engine

WANTED: by RON MELVIN. Fixed Steady for a Myford lathe

WANTED: by BOB McDONALD. Any Model Engineering magazines and books on model engineering and shop practice

 

FOR SALE:  By Remo Cosolo. Mini Motor Home. 1975 Chrysler Van, raised roof camper, excellent condition. 35,000 miles after rebuilt engine. Sleeps 2 adults, Propane/120V fridge, 2 burner stove. 6ft x 10ft awning. 12V generator and many other extras.

 

WELCOME NEW MEMBERS:      No one this past month

 

MEMBERSHIP LIST –  FOR CORRECTIONS / CHANGES PLEASE EMAIL or PHONE:

Dave Bray email: davybray@aci.on.ca