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Canadian Canadian Canadian Canadian Canadian MeccaNotes MeccaNotes MeccaNotes MeccaNotes MeccaNotes --- Issue #53 --- --- Issue #53 --- --- Issue #53 --- --- Issue #53 --- --- Issue #53 --- Mar. 2009 Mar. 2009 Mar. 2009 Mar. 2009 Mar. 2009 Ontario Ontario Ontario Ontario Ontario Science Science Science Science Science Centre Centre Centre Centre Centre Photos by Attila & Erika Szakonyi

Canadian MeccaNotes 200903 - CMAMAS

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Page 1: Canadian MeccaNotes 200903 - CMAMAS

CanadianCanadianCanadianCanadianCanadian

MeccaNotesMeccaNotesMeccaNotesMeccaNotesMeccaNotes

--- Issue #53 ------ Issue #53 ------ Issue #53 ------ Issue #53 ------ Issue #53 ---

Mar. 2009Mar. 2009Mar. 2009Mar. 2009Mar. 2009

OntarioOntarioOntarioOntarioOntarioScienceScienceScienceScienceScienceCentreCentreCentreCentreCentre

Photos by Attila &Erika Szakonyi

Page 2: Canadian MeccaNotes 200903 - CMAMAS

2 Canadian MeccaNotes2 Canadian MeccaNotes2 Canadian MeccaNotes2 Canadian MeccaNotes2 Canadian MeccaNotes March 2009March 2009March 2009March 2009March 2009

... continued on page 3

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SubscriptionsSubscriptionsSubscriptionsSubscriptionsSubscriptions

(4 Issues Per Calendar Year)(4 Issues Per Calendar Year)(4 Issues Per Calendar Year)(4 Issues Per Calendar Year)(4 Issues Per Calendar Year)

o within North America: Canada - $45; U.S.A.- US$54. Make cheque or money order payableto CMAMAS, mail to Treasurer, address above.

o elsewhere: £38, US$75 or C$77

o payment via PayPal is available, contactColin Hoare for details

© Copyright 2009 Copyright 2009 Copyright 2009 Copyright 2009 Copyright 2009

C.M.A.M.A.S. and/or IndividualC.M.A.M.A.S. and/or IndividualC.M.A.M.A.S. and/or IndividualC.M.A.M.A.S. and/or IndividualC.M.A.M.A.S. and/or IndividualContributors.Contributors.Contributors.Contributors.Contributors.

Meccano and Erector are registered tradenames and are used throughout Canadian

MeccaNotes by kind permission of MeccanoLtd..

North American subscribers to CanadianMeccaNotes are automatically members of

the Canadian Modeling Association forMeccano and Allied Systems (CMAMAS).

CanadianCanadianCanadianCanadianCanadianMeccaNotesMeccaNotesMeccaNotesMeccaNotesMeccaNotes

The “Canadian MeccaNotes” newsletter(ISSN 1207-2249) is published 4 times peryear (March, June, September and December)by the Canadian Modeling Association forMeccano & Allied Systems (CMAMAS).

“Written and produced by Meccanoenthusiasts for Meccano enthusiasts.”

Canadian Modeling Association forCanadian Modeling Association forCanadian Modeling Association forCanadian Modeling Association forCanadian Modeling Association for

MeccanoMeccanoMeccanoMeccanoMeccano & Allied Systems (CMAMAS) & Allied Systems (CMAMAS) & Allied Systems (CMAMAS) & Allied Systems (CMAMAS) & Allied Systems (CMAMAS)

130 Neptune Drive, Suite 1109130 Neptune Drive, Suite 1109130 Neptune Drive, Suite 1109130 Neptune Drive, Suite 1109130 Neptune Drive, Suite 1109

Toronto, OntarioToronto, OntarioToronto, OntarioToronto, OntarioToronto, OntarioCANADA M6A 1X5CANADA M6A 1X5CANADA M6A 1X5CANADA M6A 1X5CANADA M6A 1X5

http://www.cmamas.ca/http://www.cmamas.ca/http://www.cmamas.ca/http://www.cmamas.ca/http://www.cmamas.ca/

CMAMAS ExecutiveCMAMAS ExecutiveCMAMAS ExecutiveCMAMAS ExecutiveCMAMAS ExecutivePresidentPresidentPresidentPresidentPresident ... Colin Hoare, 18 Tweedle St.,Glen Williams, Ontario, Canada L7G 3S5,[email protected], (905)873-8261

Vice PresidentVice PresidentVice PresidentVice PresidentVice President ... Attila Szakonyi,10 Fendley Crt, Brampton, Ontario, Canada,L6Z 3H9, [email protected],(905)846-5287

TreasurerTreasurerTreasurerTreasurerTreasurer ... Marsha Brandston,130 Neptune Drive, Suite 1109, Toronto,Ontario, Canada M6A 1X5,[email protected]

SecretarySecretarySecretarySecretarySecretary ... Frank Curry, 8 Windham Drive,Toronto, Ontario, Canada M2K 1X8,[email protected], (416)221-3093

Newsletter Editor/WebmasterNewsletter Editor/WebmasterNewsletter Editor/WebmasterNewsletter Editor/WebmasterNewsletter Editor/Webmaster ... Dav idWilliams, 3017 - 111A Street, Edmonton,Alberta, Canada T6J 3Y5, [email protected],(780)438-1197

Parts & Sets Manager Parts & Sets Manager Parts & Sets Manager Parts & Sets Manager Parts & Sets Manager ... Dave Duncan,55 Lurgan Drive, Toronto, Ontario, CanadaM2R 1K7, [email protected],(416)733-8670

Editor’s NotesEditor’s NotesEditor’s NotesEditor’s NotesEditor’s NotesThis issue contains photos from the recent OntarioScience Centre show with a variety of otherfeatures. Thanks to Terry Pettitt, Larry Yates, AttilaSzakonyi, Dave Duncan, Colin Hoare and othersfor supplying items for this issue.

Part of the CMAMAS website (www.cmamas.ca)is password protected. To see the meetings ofminutes you now need this id/password: cmember/Sprocket2. Question: should wecontinue the posting of minuteson the CMAMAS website? Isanyone reading them?

As always, the newsletter isonly as good as the contribu-tors. Your articles, photos,model plans, short news items,wants, sales and swap ads arewanted. Items in machine read-able form (e-mail, CD/DVD) are preferred buteverything is acceptable. If you scan photos,please scan them at a minimum resolution of 150dpi. If desired, your material can also be postedon our website. If you’d like any part of yoursubmissions returned, please say so; otherwise Iwill keep everything.

Page 3: Canadian MeccaNotes 200903 - CMAMAS

March 2009March 2009March 2009March 2009March 2009 Canadian MeccaNotes 3Canadian MeccaNotes 3Canadian MeccaNotes 3Canadian MeccaNotes 3Canadian MeccaNotes 3

Meccano Distributor, USAMeccano Distributor, USAMeccano Distributor, USAMeccano Distributor, USAMeccano Distributor, USAAccording to a spanner post, commencing Febru-ary 2009, the USA distributor for Meccano (Erec-tor) will be the Schylling Toy Co. 1-800-767-8697.

www.schylling.com

Next Issue DeadlineNext Issue DeadlineNext Issue DeadlineNext Issue DeadlineNext Issue DeadlinePlease note that we plan to publish the June 2009issue around June 1, 2009; the deadline is May 23.

David Williams

Cable Stayed BridgeCable Stayed BridgeCable Stayed BridgeCable Stayed BridgeCable Stayed BridgeThe Cable Stayed Bridge is the most modern typeof bridge construction. The first of these bridgesappeared in the 1950’s and in recent years this typeof bridge has become more common and withmuch longer spans. While this design resemblesthe Suspension Bridge the main difference is in themethod of anchoring the cables and the deck. Inthe Suspension Bridge the cables are attached tohuge anchor blocks which are firmly embedded inthe rock at each end of the bridge. The deck is ofa flexible nature and readily moves, especially ina high wind. The cables of the Cable Stayed Bridgeare anchored to the deck of the bridge. As a resultthe deck of a Cable Stayed Bridge must be of a rigidconstruction.

The model is quite simple to construct and thepictures need no further clarification.

Ed Barclay

TTTTTable of Contentsable of Contentsable of Contentsable of Contentsable of Contents

Ontario Science Centre 1Editor’s Notes 2Cable Stayed Bridge 3Presidental Perusings 5Small Format Built-up Bearings 6Boxing Day Story 9Exhibition at the Ontario Science Centre over

the Christmas Holiday 10Pre-selector Gearbox 15Meccano Version of Rowland Emett Locomotive

(Nesta) 25The Peddler 27Parts & Sets Manager Report 27Ontario Science Centre 28

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4 Canadian MeccaNotes4 Canadian MeccaNotes4 Canadian MeccaNotes4 Canadian MeccaNotes4 Canadian MeccaNotes March 2009March 2009March 2009March 2009March 2009

Page 5: Canadian MeccaNotes 200903 - CMAMAS

March 2009March 2009March 2009March 2009March 2009 Canadian MeccaNotes 5Canadian MeccaNotes 5Canadian MeccaNotes 5Canadian MeccaNotes 5Canadian MeccaNotes 5

Presidental PerusingsPresidental PerusingsPresidental PerusingsPresidental PerusingsPresidental PerusingsAlthough we still have a significant number ofsubscribers to “Canadian MeccaNotes” who donot own a computer, the majority of our membersmake use of this modern tool every day, both athome and in the office. Certainly, all members ofthe Executive utilise one - in fact, we probablycould not do without one in 2009. It is certainly avaluable tool to keep up-to-date on the latest develop-ments in the field ofMeccano, and, through e-Bay, either purchases orsales of Meccano on theInternet can be made. Oneother opportunity is to sub-scribe to the Spanner Dis-cussion Group. One canlearn a lot of useful infor-mation from fellow contribu-tors. For any C. M. A. M. A.S. subscriber who has notinvestigated this source of information, go to:

http://mail.austprem.org.au/mailman/listinfo/spanner.

One of the most notable recent Spanner achieve-ments has been the international co-operativeventure to generate a complete and comprehen-sive index to all the issues of “Meccano Magazine”from its inception to its final demise in 1981. Needto find an article, or a topic? Go to:

http://www.meccanoindex.co.uk/

What might be described as a parallel effort is thework done by Meccano enthusiasts in NewZealand, who have created another Website whereyou can look at old issues of magazines, even if you

do not have a hard copy in your collection. To lookat this feature, go to:

www.nzmeccano.com/MMviewer.php

Talking of websites, thanks are due to the Editorof our magazine, David Williams, who found theWebsite for the 2009 Hobby Show. Judging fromthe way the show is being promoted, it looks asthough there will be a significant change in focusthis coming November. To see what is beingplanned, go to: http://www.thehobbyshow.com/.Clearly, from the way the home page has beendesigned, there will be a strong emphasis ongaming. The organisers are promoting the factthat there will be seven gaming championshipsover this particular weekend, and people are beinginvited to register in order to enter the competitionsalready. Will we, the Meccano group, be present?That obviously will depend on (a) whether theorganisers invite us back, an (b) if the terms underwhich we will be asked to participate. Since wehave been at this show since 1982, it will be hardto walk away (or, come to that, be left out - thereare no photographs of Meccano models on theWebsite), but we now have plenty of other oppor-tunities to show our skills.

The 2009 Meccano Exhibition year started early,with a lengthy opportunity to display our skills atthe Ontario Science Centre. I would like to thankeveryone who was able to find the time to partici-pate. A report on the ‘marathon’ show appearselsewhere in the magazine.

All being well, I will be returning to SkegEx againin 2009. If there is one overseas Meccano Exhibi-tion that everyone should go to one, this is the one,at least in my view. Others have merit, true, andI must admit that I have never been to any

exhibitions inEurope, but I amcertainly lookingforward to mak-ing one more tripto see what willbe on displaythere.

Colin Hoare

P.S. “Watch fora Keith Cameronmodel in theJune issue - thePush-Button De-signing Ma-chine.”

Page 6: Canadian MeccaNotes 200903 - CMAMAS

6 Canadian MeccaNotes6 Canadian MeccaNotes6 Canadian MeccaNotes6 Canadian MeccaNotes6 Canadian MeccaNotes March 2009March 2009March 2009March 2009March 2009

Small Format Built-upSmall Format Built-upSmall Format Built-upSmall Format Built-upSmall Format Built-upBearingsBearingsBearingsBearingsBearings

Small built-up roller bearings in Meccano aresomewhat lacking in rigidity, and are particularlyprone to flexing in assemblies where the weight isnot centrally distributed. This is particularly truewith bearings that are found in models such ascranes, excavators and similar types of rotatingstructures.

Meccano has proposed a number of built-upbearings for the various models depicted in themany books of instructions. None of these bear-ings, however, successfully addressed the prob-lem of flexing as mentioned above. The mainreason for this failure was quite simple: the setsdid not contain sufficient parts to allow the build-ing of more robust assemblies. For the Meccanoboy who was limited to the set he received, therewas no way he could build a better bearing -unless he was the proud owner of a Number 9 orNumber 10 set, or was able to purchase a few

spare parts.

In all fairness, Meccano can be credited with atleast two assemblies worthy of mention that aredescribed in the “Standard Mechanisms” books.These books were separate publications thatappeared from time to time throughout the historyof Meccano: within the pages, the mechanismsdescribed were each identified by a number.However, to make life “exciting,” the numberingwas not necessarily the same from one book toanother, so one had to be on the alert. The presenttext refers to the Standard Mechanisms book

identified as: 13/636/1.5 (CAN.).

The smaller and more robust of the two is the S.M.136 made up of four ½” Pulleys and two WheelFlanges (photo # 1). This built-up bearing is oftenillustrated on either the front or back pages of theBooks of Instructions that come with Meccanooutfits. As shown and described in the Meccanoliterature, however, the assembly suffers someweaknesses that can be easily remedied to in-crease resistance to flexing:

* Add two Angle Girders to the underside of the

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Flanged Plate on which the Wheel Flange isfastened (there is no use improving the rest ifthe base is not solid).

* The four Pivot Bolts # 147b that retain thePulleys must all be set to the same height, sothat the Pulleys seat properly on the WheelFlange without wobble. This is, it must bepointed out, easier said than done, but with abit of playing around, one should get theadjustment right.

* The top Wheel Flange should be reinforced.A 2" Sprocket will do nicely, but a 3" Sprocketwill allow space for a chain drive (photo # 2).

* Instead of a Sprocket, a 133-tooth GearWheel can be substituted, as it is nearly as stiffand would allow driving in a ratio of one toseven via a 19 tooth pinion (photo # 3).

The second built-up bearing proposed by Meccanois S.M.140, and this one uses two 3" Pulleys, aWheel Flange and 21 steel balls 3/8" in diameter(photo # 4). One should use true ball bearings,instead of the moulded balls that come in theNumber 9 or Number 10 sets, as the latter do notallow smooth rotation. Again a few small modi-fications can greatly improve the performance ofthis assembly:

* Add two Angle Girders to the underside of theFlanged Plate on which rests the 3" Pulley, inorder to support the edge of the pulley as muchas possible. If a Flat Plate is used instead of aflanged one, you may want to add four AngleGirders to offer as much support as possible tothe outer edge of the pulley.

* Make sure Washers are inserted between theunderside of the pulley and the plate so that thebolts do not distort the parts upon tightening.

* Substitute the top pulley for a 3" Sprocketwhich will allow just sufficient space for achain drive (photo # 5).

* As with S.M. 136, a 133-tooth Gear Wheelcan be substituted to permit driving via a 19tooth pinion (photo # 6).

Meccano’s best effort towards a suitable built-upbearing resides in the three part ball bearing # 168,which is at the heart of assembly in S.M.138illustrated in the Book of Standard Mechanisms.Once again the problem of flexing creeps up, butthis can be minimized by the addition of Flat Plates

and Sprocket Wheels bolted to the Flanged Discand Toothed Disc of the ball thrust races, oralternatively by replacement of the toothed disc bya 133-tooth Gear Wheel (photo #7). These reme-dial suggestions are some of the simpler ways ofimproving the smaller Meccano built-up bearings.

Other small bearings have been proposed onoccasion in “Constructor Quarterly,” “CanadianMeccanoman’s Newsletters” and other group

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periodicals, as well as by individual members ofthese various “heavy metal” groups. With nopretence at being exhaustive, here are a fewexamples.

Remove the four ½” Pulleys, and replace them byfourteen 3/8" ball bearings (photo # 8). The ballbearings are maintained against the inner perim-eter of the wheel flange by two wheel discspositioned centrally in the wheel flange, and boltedatop one another. Replace the upper Wheel Flangeby a Sprocket Wheel, to which have been boltedAngle Girders and a combination of other parts toform a solid anchor to seat the superstructure.This arrangement has the advantage of a substan-tial reduction in space, requiring as little as 2½” indiameter and a gain in height.

A 2" Sprocket is quite adequate for a pivot support:

however, a 3" Sprocket will allow a chain drivenrotation (photos # 9 and # 10). Keep in mind thatthe horizontal use of chain requires careful adjust-ment, and perhaps the use of an idler to take up theplay. Another possibility is the use of a 95-toothGear Wheel seated directly on top of the ballbearings, and driven by a 19-tooth Pinion (photo# 11). My first thought with this arrangement wasthat the elongated slots in the Gear Wheel mightinterfere with the smooth rotation, but such is notthe case: this is because at least 10 of the 14bearings are under the solid portion of the gear at

any one moment during a full rotation cycle. Aminor drawback with the Gear is that it is slightlythinner than a sprocket wheel and thus slightlymore prone to flexing.

Another way of getting this built-up bearing torotate properly is to turn it upside down! In thisinverted arrangement, the 2" Sprocket serves asthrust plate for the ball bearings, and the GearWheel is bolted on top of the Wheel Flange with itsboss facing up. Because of the boss, anythingfixed to the gear will require spacers and washersto get things level (photo # 12). Note the use of asmall thrust bearing in this construction. This ismade up of a small Contrate, a ¾” Washer and 7ball bearings 3/16" in diameter inserted in be-tween, the idea being to reduce friction to aminimum. Both size ball bearings are standardstock items at an industrial bearing supplier.

The only inconvenience with ball bearings is in thehandling. While taking the photographs, I washolding an open bearing containing 21 loose balls.You guessed it - the next moment I had the bearingsbouncing all over the ceramic kitchen floor, underthe appliances etc… it’s amazing how far they canroll. I huffed and I cussed until all 21 were backwhere they belonged.

In a forthcoming article I will present assembliessuited to models of a more demanding nature.

Larry Yates

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Boxing Day StoryBoxing Day StoryBoxing Day StoryBoxing Day StoryBoxing Day StoryToday has been a really fun day! The wicked witchof the north told me she was comming to see meand wanted certain documents from me and I ambeing non compliant for several days. I simply saidI will not be at home on Boxing Day.

I thought for a while, asked myself where’s a goodplace to hide all day? — in a crowd of people, ofcourse! So where will there be a crowd of peopleon Boxing Day? — in a mall of course! Does it getany better than that? — Yes it does!

So I am up early and wait for it to open. First inthe door, walking stick in hand, now with mylungs, I can not walk fast or far. However I amthere for the day and there are lots of seats andeven really big comfortable chairs. Well does it getany better than this? — Yes it does, there is enoughstructural steel that I can not call out and thatmeans the wicked witch of the north can not callin. She made four attempts and then gave up.

Does it get any better than that? — Yes it does! Ifound a nice little place opened before the foodcourt and had a very tasty omelet and a side orderof fruit with my medications, for breakfast.

Well dose it get any better than that? — Yes it does.I am walking and sitting and walking and sittingand so on and so on, largely aimlessly because Ido not need or want any thing except to stay lostfor the day. Well a sixty year old instinct iscontrolling my steps and I find myself in Sears ToyLand. I imagine I can hear bells ringing and I amwearing the most tremendous grin. There is a signthat says “ buy one at regular price get the secondat 70% off. I pinched my self and I am notdreaming. I go instantly to the Meccano isle, thepickens are slim but there are two “HundredthYear Anniversary Sets”. I would not pay full pricefor these. But two at 35% off, that seemed too goodto turn down. I hobbled them out to the van andwobbled back in.

Well does it get any better than that? — Yes it does!!The walking is slowed down to a speed that couldbe calculated in “ Fur longs per Fortnight”; andempty seat are becoming as scarce as chickensteeth. But there kind people about that give up theirseats to an old grey haired stumble bum who ishanging on to that walking stick with a death grip.Any how the old Elf wanders in to F. G. Bradleys,game store. In hales deeply pushes down heavyon the walking stick and pulls him self up as tallas he can.

Lo and behold there is Meccano but it is not onreduced price. Bummer! The old geyser asks thesales lady. She says not on special today. Rejectedand worn out the geyser waddels out finds a seatand rests. He is determined he will not pay fullprice on Boxing Day. He makes three moreattempts with other sales people, fails miserably!Now remember the goal for the day is to hide fromthe wicked witch of the north and its too early togo home. The old geyser takes several deepbreaths and re enters the game den again. Thistime he is met by a great smile from a sales ladythat says” you have been here before” and “that’sthe boss over there”. So the geyser corners theowner and says “ I would like to buy someMeccano but not at regular price on Boxing day”.The geyser explains the deal at Sears. The man-ager says “he can not match that”. The geysersays “ what can you do?” the manager says “ ifyou buy one at regular price the second one is 50%off. The geyser says” SOLD” the geyser and thesmiling sales lady both wink at each other.

Does it get any better than that? — Yes it does!

All four Meccano sets are of the type in the Blackand Grey plastic cases. Could be better but notfrom current production.

So does it get any better than that? — Yes it does!

So the Head Curmudgeon now plans to buildsomething out of at least one of those sets at nextexhibit comming up, since the Head Curmudgeonhas been unable to check out the models heoriginally planed to take!

Does it get any better than that? — Yes it did!!

The girl watching was great! It would seem thatthe Oriental girls have the best smiles!!!!! I dobelieve I have a severe case of yellow fever.

So does it get any better than that? — Yes it did! Igot all the way home without the wicked witch ofthe north finding me.

So does it get any better than that? — Yes it is!

The Stumble Bum, the Elf, the Geyser and HeadCurmudgeon are all the same Person John ArthurWapshott.

And it does not get any better than that.

John Wapshott, aka ‘the Head Curmudgeon’

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Exhibition at theExhibition at theExhibition at theExhibition at theExhibition at theOntario Science CentreOntario Science CentreOntario Science CentreOntario Science CentreOntario Science Centre

over the Christmasover the Christmasover the Christmasover the Christmasover the ChristmasHolidayHolidayHolidayHolidayHoliday

The Ontario Science Centre boasts the largestcollection in the world of so-called Dream Ma-chines by the late British cartoonist RowlandEmett. When the company by the name of BigLeague Productions brought its version of themusical version of “Chitty Chitty Bang Bang” to theCanon Theatre in Toronto over the Christmasperiod, this created an opportunity to put all theRowland Emett machines out on display. RowlandEmett had been intimately involved with the origi-nal version of the musical, so the timing was ideal.

Since C. M. A. M. A. S. had previously approachedthe management of the Ontario Science Centreabout exhibiting there, we were invited to partici-pate throughout the holiday nine-day period in thesame hall where the Emett models were ondisplay. The one caveat was that the Centre is verypro-active when it comes to “hands-on” participa-tion by visitors, particularly youngsters. Thanksto Hubert Hogle, and the quantity of Meccano thathe has available for such an event, we were ableto comply with the request.

Planning to havemembers in atten-dance for a nine-dayperiod took some con-siderable effort, butmany members in theToronto area re-sponded to the call,and we were able tostaff the area on allnine days. At times,however, we prob-ably did not haveenough to meet thenumber of people whocame to the Centre(one day there wereover 5,000 peoplewho came to thevenue, although - for-tunately - not all ofthem came to playwith the Meccano),and it was quite tiringto staff the location.Having said that, it

proved to be an interesting experience, althoughbefore we return (which we plan to do, and we arewell aware that the Centre would like us to comeback), we will need to negotiate some changes tothe arrangement.

The bulk of the time was spent supervising the playarea. AS stated, Hubert Hogle had kindly provideda vast amount of both regular and plastic Meccanofor use by the general public, and we soondiscovered that this feature was very popular! Somuch so, that a great deal of the time was spentdismantling the creations made by the visitorsonce they had left, and trying to replace them intheir correct storage bins, so that others could stepin and start building. We also had to dissuadepeople from taking their models with them, despitethe signs stating clearly that no Meccano was toleave the area that had been roped off for us. ErikaSzakonyi even had to retrieve a couple of modelsthat somehow “escaped” and made their way tothe cafeteria three floors down!

In addition to the hands-on area, we had a sectionset up where models that members had built couldbe seen. There were also some “hands on”models, notably the models that Eric Eisen nor-mally brings. Eric was kind enough to bring themto the Centre, but he was unable to stay, and themodels were certainly tested “to the limit,” onemight say. Sadly, they suffered somewhat as a

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result, and needed repair once theshow came to an end.

Most of the members’ models werenot new, but we did have a docksidecrane from newcomer Hans Pape, aswell as a rebuild of the GrasshopperPumping Engine by Vice-PresidentAttila Szakonyi from an original designby Norm LaCroix. The most popularmodel for the youngsters was, inevita-bly, Hubert Hogle’s R2D2. The major-ity of the models had to be kept out ofthe way of the visitors, however, as wesoon found that, without adequatesupervision (including parents, in someinstances), small hands were findingtheir way into the gear mechanisms ofthe models!

One unexpected pleasure was a sur-prise visit by British Meccanoman TerryPettitt. Terry has a daughter and son-in-law plus a couple of grandchildrenin Cambridge, Ontario, and he and hiswife decided to make a last-minute tripto Canada to share Christmas with thefamily. Terry became a subscriber toCanadian MeccaNotes during his visit,and his first article appears in thisissue.

Colin Hoare

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• •a· • • •Go • • •G• • • ·~o

0 · •• •Q • • • •I ' 0 • • • • Q• • •

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• • • Qf • • •

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c3 V CANADIAN MODELl NO ASSOCIATION

' OR MECCANO AND ALUED SY8TI!M8

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Pre-selectorPre-selectorPre-selectorPre-selectorPre-selectorGearboxGearboxGearboxGearboxGearbox

The model is an attempt toreproduce a working repre-sentation of a Wilson four-speed-and-reverse Pre-selec-tor Gearbox, using only stan-dard Meccano parts otherthan the brake linings andsome light springs.

It follows the original as faras possible, the only draw-back being that the ratios arerather wide being i.e. 1:1, 2:1, 3:1, 9:1, and 5.4:1 in re-verse.

The gearbox comprises the following main sec-tions.

1. The main frame

2. The brake shoes and actuator links

3. The planetary gear assembly including theoutput differential

4. The gear selection mechanism

5. The brake actuation assembly

1. The Main Frame1. The Main Frame1. The Main Frame1. The Main Frame1. The Main FrameThe construction of this is fairly straightforward,as will be seen from the photographs (although itmight be better to try to avoid the mixture ofdiffering colour schemes that have been used).

2. The Brake Shoes and2. The Brake Shoes and2. The Brake Shoes and2. The Brake Shoes and2. The Brake Shoes and

Actuator LinkActuator LinkActuator LinkActuator LinkActuator Link(See PS-19)(See PS-19)(See PS-19)(See PS-19)(See PS-19)

Construction of this can beseen clearly in the abovephoto.

The two brake shoes areformed from Formed SlottedStrips that have been curvedto conform to the outside di-ameter of the plastic gear ring,but allowing for the thicknessof the lining, which is a pieceof 1.5 mm thick rubber at-tached with Araldite or othersuitable adhesive to theCurved Strip.

The ends of the Strips are bentto provide an attachment tothe inner angle girders of the

main frame, and the top end of one strip is bent andbolted to a Rod and Strip Connector (Part No 212a)and the top of the other strip is bent in the samemanner and bolted to a Double Bracket.

The Rod and Strip Connector on one shoe providesa pivot point for the two Corner Brackets (Part No133a).

The purpose of these is to produce a toggle actionduring the upward movement of the actuator linkwhich increases the brake pressure considerably.

The actuator link is constructed from four 2½”strips spaced apart as shown. The 1.5 mm gapbetween the two inner strips is to provide alocation on the actuator lifting bar to avoid slippingout of contact when the bar is raised.

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The 5 mm gap between the outer strips is toprovide a spring action when the selector camrotates and pushes the link into contact with theactuator lifting bar, which is normally in the raisedposition prior to being lowered and subsequentlyraised again to lift the actuator link and thusengage the brake on the selected gear ring.

3. The Planetary Gear3. The Planetary Gear3. The Planetary Gear3. The Planetary Gear3. The Planetary GearAssembly (See PS-Assembly (See PS-Assembly (See PS-Assembly (See PS-Assembly (See PS-

8,9,10,11,12)8,9,10,11,12)8,9,10,11,12)8,9,10,11,12)8,9,10,11,12)The most important consideration isthat the main shaft must be abso-lutely straight, as any runout willcause deflection of the engaged brakeshoes, which in turn will cause in-creased drag.

The shaft as shown is 8½” long, andthe output end extends slightly intothe bore of the output differentialBush Wheel.

Mounted on the shaft starting at theoutput end are the following compo-nents (a) a 50-tooth Contrate, lockedto shaft, a 4-hole Collar (Part No140y), loose, a second 50-toothContrate, loose, Plastic Gear Ring,loose, 19-tooth Pinion locked, PlasticGear Ring, loose, 19-tooth Pinionlocked, Plastic Gear Ring, loose, 19-

tooth Pinion locked, Plastic Gear Ring,loose, Light Compression Spring, 57-Tooth Gear, loose, Bush Wheel locked ,and finally Bush Wheel, loose.

All these parts are spaced apart withwashers, to give an overall length overthe gear rings of 123 mm, and ensuringthat the gap between adjacent rings isconstant

Each of the gear rings is fitted with three19-tooth Pinions locked on to 1" AxleRods mounted in the appropriate holes inthe Gear Ring.

At this point it is worth selecting all the19-tooth Pinions carefully to ensuresmooth running, as obviously the 19-tooth sun Pinion is not divisible by three,and some binding may occur.

The free running 50-tooth Contrate islocked to the adjacent Gear Ring bymeans of a nut and bolt engaging a holein the gear ring.

The 57-tooth Gear is fitted with two Bolts asshown, to provide a drive from the Bush Wheellocked to the shaft, and can then be pushed intoengagement by means of the free Bush Wheel,while disengagement is achieved by means of theCompression Spring.

The construction of the output differential followsstandard practice and can readily be seen in thephotos.

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4. The Gear Selection4. The Gear Selection4. The Gear Selection4. The Gear Selection4. The Gear Selection

Mechanism (See PS-Mechanism (See PS-Mechanism (See PS-Mechanism (See PS-Mechanism (See PS-

29,32)29,32)29,32)29,32)29,32)This comprises mainly the gear selectorcamshaft and the transmission to the cam-shaft from the gear selection lever, which inthe case of this model was fitted concentri-cally to the steering column.

As can be seen in the photographs, thecams consist of two Anchoring Springs(Part No. 176) mounted face to face and tiedtogether with a small twist of wire toprevent movement. Here again, it is impor-tant that this Axle Rod is as straight aspossible.

The angular spacing of the cams is suchthat, in the neutral position, none of thecams must be deflecting the brake shoeactuator links to the extent that they engagethe lifting bar. In addition, the cams shouldbe set so that only one link is engaged, andthat their sequence is: 1, 2, 3, 4, neutral,reverse.

The method of transmission from the selec-tor lever obviously depends upon the rest ofthe model, but in this case this involved astep up ratio of 3.125:1 in order to limit theangular movement of the lever, which initself can cause problems due to backlash,making precise rotation of the camshaftdifficult. (See PS-36,37,38)

5. The Brake Actuation5. The Brake Actuation5. The Brake Actuation5. The Brake Actuation5. The Brake Actuation

Assembly (See PS-2, 26,Assembly (See PS-2, 26,Assembly (See PS-2, 26,Assembly (See PS-2, 26,Assembly (See PS-2, 26,

27, 28, 29)27, 28, 29)27, 28, 29)27, 28, 29)27, 28, 29)The purpose of this assembly is as follows:when the required gear is to be engaged,operation of the engagement pedal causes thehorizontal lift bar to be lowered, which thenallows the brake calliper actuator link of theselected gear to move over the top of the liftbar, and thus when the pedal is released theactuating spring raises the lift bar and therebyapplies the brake to the plastic gear ring.

The lift bar is formed from a 7" Axle Rod,supported by a Rod and Strip Connector, PartNo 212a, at each end. These latter parts are,

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in turn, pivoted on the arms of a Bell Crank(Part No 128) at one end, and at the otherend on a Bell Crank formed by a CornerBracket Part No 133.The horizontal arm ofthe Corner Bracket is extended by means oftwo 2½” Strips, to which is bolted a CurvedStrip (Part No 90a) reinforced with a Trian-gular Plate (Part No 77). This forms an armwhich is connected to the engagementpedal by a suitable linkage.

The lower vertical arms of the Bell Cranksare connected by a 7½” Strip free to pivot,and by this means the lifting bar is main-tained in a horizontal plane throughout itsmovement.

Attached to the 7½” Strip is a Spring (PartNo 43), extended sufficiently to apply therequired brake pressure on the gear rings.

The 7½” Angle Girder is shown tilted toallow a view of the actuating linkage, but isnormally positioned to provide a rest posi-tion for the lower end of the brake calliperactuating links, such that they may passover the lift bar in its lowest position.

Top gear engagement is achieved by meansof sliding the 57-tooth Gear into engage-ment with the Gear Ring, and the linkage forthis can be seen in photos PS-3, 23, 24, 25.

In this the actuator link is pivoted at the endof an Axle Rod which in turn is pivoted at the

other end to the main frame. Mounted onthis Rod is a light (non-Meccano) TensionSpring that is attached at its lower end to theend of a 1½” Narrow Strip, which in turn isbolted to a Collar mounted on the horizontalAxle Rod. This Rod also has two 1½”Stripsmounted in the same manner that engagewith the boss of the free mounted BushWheel on the main shaft.

Thus upward movement of the actuator linkextends the tension spring, which in turncauses the Bush Wheel to push the 57-toothGear into engagement.

Important ConstructionImportant ConstructionImportant ConstructionImportant ConstructionImportant Construction

PointsPointsPointsPointsPointsThe key factors in construction of this

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gearbox are that the main shaftmust be straight, and that all theplanetary gears run freely

The brake shoes should be set asclose as possible to the GearRings, but at the same time theymust not drag, as this will creategreater braking force.

All brake calliper actuator linksshould be set accurately so thatthe movement created by thecams pushes each link into justthe right position to engage withthe lifting bar, but is clear of thebar when another gear is se-lected.

The transmission from the gearselection lever needs to besmooth in operation, with posi-tive notches for each gear posi-tion and as little backlash aspossible.

The lifting bar actuator linkage should be set sothat its upward movement, when a gear is en-gaged, is not restricted by anything other than thebrake shoes makingcontact with the gearrings: by this meansmaximum brakingpressure will be ap-plied.

Terry Pettitt

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brake calliper Hnko

DrgPS-26

camshaft in neutral position no brake caJlHper links compressed a

2cnd gear selected by cam pushing brake calliper Hnk against Hft bar 0

support angle lowered for clarity Drg PS-27

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Drg PS- 28

lift bar lowered, 2cnd gear selected

Drg PS-29

lift bar raised, 2cnd gear engaged

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Drg PS-34

spring cord anchor springs facing each other

gear selector camshaft

Drg PS-32

actuating spring to raise lift bar and thus apply brake.

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Drg PS-36

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Meccano Version of RowlandMeccano Version of RowlandMeccano Version of RowlandMeccano Version of RowlandMeccano Version of RowlandEmett Locomotive (Nesta)Emett Locomotive (Nesta)Emett Locomotive (Nesta)Emett Locomotive (Nesta)Emett Locomotive (Nesta)

John Bridger from the U. K. has sent these two photographs of his newRowland Emett locomotive (Nesta).

Colin Hoare

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March 2009March 2009March 2009March 2009March 2009 Canadian MeccaNotes 27Canadian MeccaNotes 27Canadian MeccaNotes 27Canadian MeccaNotes 27Canadian MeccaNotes 27

MECCANO &MECCANO &MECCANO &MECCANO &MECCANO &ERECTORERECTORERECTORERECTORERECTOR

Parts, Sets & LiteratureParts, Sets & LiteratureParts, Sets & LiteratureParts, Sets & LiteratureParts, Sets & Literature

Old, New, Used, RestoredOld, New, Used, RestoredOld, New, Used, RestoredOld, New, Used, RestoredOld, New, Used, Restored

Send $2.00 (U.S. or CDN)Send $2.00 (U.S. or CDN)Send $2.00 (U.S. or CDN)Send $2.00 (U.S. or CDN)Send $2.00 (U.S. or CDN)

New Parts List w/PricesNew Parts List w/PricesNew Parts List w/PricesNew Parts List w/PricesNew Parts List w/Prices

*** SPECIAL TO MEMBERS ****** SPECIAL TO MEMBERS ****** SPECIAL TO MEMBERS ****** SPECIAL TO MEMBERS ****** SPECIAL TO MEMBERS ***

Remote Control UnitsRemote Control UnitsRemote Control UnitsRemote Control UnitsRemote Control Units

with 2 Motors: US $50.00with 2 Motors: US $50.00with 2 Motors: US $50.00with 2 Motors: US $50.00with 2 Motors: US $50.00

ALSOALSOALSOALSOALSO

Master Builder Sets: US $100.00Master Builder Sets: US $100.00Master Builder Sets: US $100.00Master Builder Sets: US $100.00Master Builder Sets: US $100.00

(Shipping Extra)(Shipping Extra)(Shipping Extra)(Shipping Extra)(Shipping Extra)

Discounts on 1990's sets;Discounts on 1990's sets;Discounts on 1990's sets;Discounts on 1990's sets;Discounts on 1990's sets;

Call or e-mail for details.Call or e-mail for details.Call or e-mail for details.Call or e-mail for details.Call or e-mail for details.

LOU BOSELLILOU BOSELLILOU BOSELLILOU BOSELLILOU BOSELLI

19 Payson Rd.19 Payson Rd.19 Payson Rd.19 Payson Rd.19 Payson Rd.

Cornwall-on-HudsonCornwall-on-HudsonCornwall-on-HudsonCornwall-on-HudsonCornwall-on-Hudson

N.Y. 12520 U.S.A.N.Y. 12520 U.S.A.N.Y. 12520 U.S.A.N.Y. 12520 U.S.A.N.Y. 12520 U.S.A.

(845) 534-2863(845) 534-2863(845) 534-2863(845) 534-2863(845) 534-2863

[email protected]@[email protected]@[email protected]

The PeddlerThe PeddlerThe PeddlerThe PeddlerThe PeddlerFOR SALE: 1927 Meccano Set - excellent condi-tion. Complete with miscellaneous pamphlets andmagazines. Contact: Greg Greason for inventoryand photos Apt. 10, 72 Isabella St., Toronto, ON.,Canada M4Y 1N4, [email protected], Tel:416-924-0423.

FOR SALE: I have a large collection of Meccanomagazines from 1925 through 1975 in variousconditions from poor (no cover) to excellent.Prices start at 50cents up to $30 each dependingon age and condition. Obviously mailing costswould be additional. Alan [email protected]

Parts & Sets ManagerParts & Sets ManagerParts & Sets ManagerParts & Sets ManagerParts & Sets ManagerReportReportReportReportReport

Happy belated New Year everyone. I hope throughthese strange economic time we can still find thetime and motivation to build our models. I haveissued the new 2009 price lists for our reproduc-tion parts. They should be posted on the web andor mailed to you by now. Please feel free to contactme anytime to discuss your needs.

My Meccano workshop is near completion and Ishould have some photos for the June issue. I ambuilding a couple newer Meccano models fromkits to keep my basic motor skills intact. (F-1 RaceCar & Nasa Rocket). My larger projects will beginlater this month I hope. I apologize for the briefreport this time around, but I will have lots ofgoodies to talk about later in June. Till then, keepbuilding and thank you for your continuing supportfor our club.

All the best,

David Duncan, CMAMAS

Page 28: Canadian MeccaNotes 200903 - CMAMAS

28 Canadian MeccaNotes28 Canadian MeccaNotes28 Canadian MeccaNotes28 Canadian MeccaNotes28 Canadian MeccaNotes March 2009March 2009March 2009March 2009March 2009

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Photos by Attila &Erika Szakonyi