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Home   Forums   Events Calendar   Sponsors   Support the RRLine   Guestbook   FAQ     Register Active Topics | Active Polls | Resources | Members | Online Users | Live Chat | Avatar Legend | Search | Statistics Photo Album | File Lister | File Library [ Active Members: 12 | Anonymous Members: 0 | Guests: 62 ]  [ Total: 74 ]  [ Newest Member: Old Dog ]  All Forums  Model Railroad Forums  The On30 Line  Round and Modular Previous Page | Next Page  New Topic |    New Poll |   Reply to Topic |   Printer Friendly Author Topic Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 of 15 jcoop Crew Chief Posted - 06/21/2012 :  2:51:33 PM     If you come in 3" from the outer edge for safety you still have a radius of 34 1/2", so that would give you room to play with some curves and make it more interesting that just a circle. John John Sitting along side the orignal Central Pacific Rail Road. Home of The Great On30 Barn Meet, that will be held April 27th 2013 Country: USA | Posts: 977 Sean_OBrien Engine Wiper Posted - 06/21/2012 :  3:03:32 PM     http://www.handymath.com/cgi-bin/arc18.cgi That way you can play around with the numbers a bit more easily. For the width - just subtract your square (24" in the above) from the diameter (75") to get your width (25.5"). Beyond that - the calculator I linked to will give you all the information that you need just by providing it with a radius and an angle (90 degrees of course for 4 sections). Country: | Posts: 151 Tommatthews Fireman Premium Member Posted - 06/21/2012 :  3:31:22 PM     John, That is what I was thinking of. If you used 24" instead of 26" you could work with 1/2 sheets of plywood. If you call this measurement "A". Then if you reduced the 53" to 48", calling this measurement "B". Measurement "A" would be smaller, however, you could get 4 pieces from a 48" x 96" of plywood. Or, you could work with 60" x 60" sheets of baltic birch which is very nice. Just a couple of thoughts to toss around. Country: | Posts: 7278 Geezer Fireman Premium Member Posted - 06/21/2012 :  3:59:32 PM     I'd cheat & use a biscuit joiner to make the width that I need instead of big bucks for special cuts..... Thanks for the link Sean..... Bill CC&BW Wilani Lumber & Mining Co. http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=34275&whichpage=58 http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=28172&whichpage=89 Country: USA | Posts: 8185 Rick Administrator Premium Member Posted - 06/21/2012 :  4:01:16 PM     Hmmm, you guys have got me thinking now. I was reading along the first page and a half of this thread and had a tough time visualizing what you were discussing. After seeing Martins drawings, the light bulb went on. I like this concept a lot and will refer to this thread later. As is my procrastinating way, it will be much later than sooner. In the mean time I will enjoy Tom's, and anybody else who decides to join in, effort. Thanks for the drawings Martin to get the ball rolling. Thanks also to John for the conversion. Country: USA | Posts: 17740 jcoop Crew Chief Posted - 06/21/2012 :  4:43:33 PM     Tom, You could reduce it to get to the four parts from one sheet, personally I would be inclined to go a little bigger not smaller. You could get 2 pieces from a 4 x 8 sheet, but I would not use plywood because of the weight. I would go with a open frame with a solid roadbed where the tracks would be then the rest would be foam (blue, pink, or white) to fill in the areas. Plywood can get real heavy real fast. I build 30" x 48" mods that are rite around 10 lbs before they get any scenery other than the basic land forms. John Sitting along side the orignal Central Pacific Rail Road. Home of The Great On30 Barn Meet, that will be held April 27th 2013 Country: USA | Posts: 977 Sean_OBrien Engine Wiper Posted - 06/21/2012 :  5:12:40 PM     quote: Originally posted by Geezer I'd cheat & use a biscuit joiner to make the width that I need instead of big bucks for special cuts..... Thanks for the link Sean..... T&G sheeting. Comes in thicknesses from 7/16" up to 1". Save you the time and hassle of using the biscuit jointer on plywood (use mine on solid wood fairly often - but I have had it blow out the sides of plywood once or twice). If you went with 5 segments and a 40" radius - you could get 3 segments out of one 4x8 sheet. The area of each segment (if you give yourself 24" of depth) would be right around 844 inē - less then a quarter sheet of plywood. Each segment would also give you 50" of frontage to build on - which is only slightly less than the 6' circle would give you (but you would have an additional module to build something in). Country: | Posts: 151 BigLars Fireman Premium Member Posted - 06/21/2012 :  6:43:11 PM     quote: Originally posted by Geezer You canucks can convert that....LOL...I had to go cheat and find that 1272mm = about 50"....thanks Marty....good start.....How bout one with 1/3rds? ;-) Yeah it paid off growing up in the great white north and falling victim to one of the biggest practical jokes in history. US to Canada... Let's convert to metric. Canada... Sure sounds like fun let's do it. US. OK you jump of the cliff first. Canada ... OK Eh sounds like fun. Crack .. Thud. US oh that's what is involved. We were just kidding. Canada ... That hurt eh not doing that in reverse to switch back. Enough history lesson. Tom, I am watching closely and if I had any wood working skills I would jump in with you. Country: USA | Posts: 7367 milocomarty Fireman Posted - 06/21/2012 :  6:53:50 PM       Ok help me out here, what the .... are joiners related to a kinda cookies?? Grtz Martin.. http://cardiganbaycoastalrailroad.wordpress.com/ Country: Netherlands | Posts: 4927 BigLars Fireman Premium Member Posted - 06/21/2012 :  7:13:17 PM     Martin, So how much to build the corners? Local pick up? Country: USA | Posts: 7367 jcoop Crew Chief Posted - 06/21/2012 :  7:28:57 PM     Also referred to as "Biscuits" John Sitting along side the orignal Central Pacific Rail Road. Home of The Great On30 Barn Meet, that will be held April 27th 2013 Country: USA | Posts: 977 milocomarty Fireman Posted - 06/21/2012 :  7:31:38 PM       Thanks Larry, another thing learned. We call'm lamello's over here. But I don't see the need of using them in building MRR modules.. Grtz Martin.. http://cardiganbaycoastalrailroad.wordpress.com/ Country: Netherlands | Posts: 4927 Sean_OBrien Engine Wiper Posted - 06/21/2012 :  7:58:28 PM     Mainly would be used for stretching boards in this application. Depending on the particular arrangement you decided to go with - you might be limited to only getting 1 section out of each sheet of plywood. However, the biscuit joint (or lamello joint if you prefer) is pretty strong and would allow you to reuse that waste in order to get more use out of each sheet. For those who don't have access to one but still want to go big - they make tongue and groove plywood that provides a nice strong joint too. Just try to remember that in order to have a tongue and a groove that you can reuse to make your small scraps big again. Country: | Posts: 151 Geezer Fireman Premium Member Posted - 06/21/2012 :  8:03:19 PM     The only reason I would use them marty is if the surface area surpassed 48", which is a common dimention for plywood sheets in the US - 48"x96" or 4' x 8'.....Biscuit joiners are set in the lateral edge of the sides being joined...the slots are cut with the proper tool, and the whole side of the joint is covered with wood glue, the biscuits installed and then the units are clamped together and left to bond. Pretty common practice here in the US....;-) Bill CC&BW Wilani Lumber & Mining Co. http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=34275&whichpage=58 http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=28172&whichpage=89 Country: USA | Posts: 8185 Bill Uffelman Crew Chief Posted - 06/22/2012 :  06:28:52 AM     http://dixiecentralrailroad.blogspot.com/ is a blog describing the construction of a circular sectional RR that is applicable to the current discussion. Bill Uffelman Ocean View DE & Las Vegas NV Country: USA | Posts: 900 Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 of 15 Topic    New Topic |    New Poll |   Reply to Topic |   Printer Friendly Previous Page | Next Page Jump To: Select Forum Railroad Line Administrative Forums       Forum News       Administrative Posts General Forums       The Tour Bus       The Arrival Track       RR-L Member Personal Websites       The Crew Lounge       The Classroom       Interchange Tracks       Rail Events       Reference & Research Model Railroad Forums       The Sn3 Branch       Mike Chambers' Craftsman's Corner       HOn30 and HOn3 Forum       Early Rail Forum       The On30 Line       Railroad Photography Forum       Small Scale Model Railroad Forum       Mid Scale Model Railroad Forum       Large Scale Model Railroad Forum       Logging, Mining, & Narrow minded       Model Railroad Construction       Micro & Mini Layouts       Layout Design / Operation Sig Forum       Startin' from Scratch       DCC, Computers and Electronics for Model Railroads Shop Talk       Vehicle and Non-Rail Transportation Modeling       The Roundhouse       Rolling Stock: the Car Shops       The Diesel Shop Company Store       Railroad-Line Swap Meet       New Product Announcements Fallen Flag Railroad Forums       Erie / Lackawanna Railroad Forum       Raritan River Railroad Forum Railroad Software Forums       Atlas Right Track Software       Railroad Line Software Library Model Railroad Club Forums       The Model Railroad Club Forum Sponsor Forums       Rusty Stumps Scale Models       KingMill Enterprises Railroad Line Weblinks       Badger Creek Lumber Co.       Central Missouri & Southern RR       Raritan River Railroad       Thor's All Gauge Page  -------------------- Home Active Topics Frequently Asked Questions Member Information Search Page Railroad Line Forums © 2000-13 Railroad Line Co.
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