Re: Stop me before I make (another) mistake ...
Gary Just remember that most prototype turnouts above #16 have frogs that close off the unselected route by moving the closure rail against the point. This is functionally equivalent to the old HO Tru-Scale switches, (still available in HO,S, and O). In fact, their current catolog lists #24s in HO and #16s in S. Scary. My current layout has 24ft min radius, and #10s work for everything, including Asters entering a passing track at Warp Lionel; my wife's expression for Asterholics who run at full throttle. Jim Stapleton == Ouch, a # 12 ( 4.46 dg) frog will be interesting. Never done one that big (small in degrees) Done lots of # 10s which work out to about 25 foot radius. ==SNIP As a point of interest here some real turnouts used #24 frogs with a lead distance of 185 feet and a radius of 5600 feet! Gary Broeder Jim Jo Anne Stapleton Purcellville VA [EMAIL PROTECTED] [EMAIL PROTECTED]
Re: Boxpok driver model preview other questions
Mike: I hope I didn't make the impression that I was being critical of Gary's wheel design. Never considered it. Jim
Re: Boxpok driver model preview other questions
At 07:56 AM 10/30/02 -0500, you wrote: I hope I didn't make the impression that I was being critical of Gary's wheel design. Never considered it. Jim Sounded like slander to me, pure an simple. I'm thinkin' lawsuit here. hw
Re: Boxpok driver model preview other questions
I'll have my people contact your people Jim
Re: US Track Standards
In a message dated 10/29/2002 3:00:27 AM Eastern Standard Time, [EMAIL PROTECTED] writes: I would like to know what track standard is generally used in the states, especially club layouts and steam-up meet display layouts. Do U.S. modelers use G1MRA or is there another (NMRA) standard? Maybe I missed a direct answer, so here goes... Most US modellers seem to have adopted G1MRA standard, with a 1.574 wheel back-to-back, (Especially the Accucraft 1:20.3 NG live steam folks, who run on the tracks owned by the 1/32nd scale Aster owners!) However, some folks haven't actually thought that far, and are still using LGB track 'out of the box' for their sparkies. Pete
Re: sslivesteam-Digest - Number 984
In a message dated 10/30/2002 3:01:09 AM Eastern Standard Time, [EMAIL PROTECTED] writes: As a point of interest here some real turnouts used #24 frogs with a lead distance of 185 feet and a radius of 5600 feet! FYI - some of those #24s are high-speed switches, designed for full speed operation. I beleive the freight railroads run through them at 55mph, but on NJ Transit/Amtrak at the Keaney interchange, the passenger trains run thru at about 70+mph. I also believe they have movable frogs. There are 3 pneumatic actuators for the tie rods, and one or two for the frog, which closes to present a continuous rail for the passing track. Pete
Pete Points
Very interested in your point Pete, or should I type points? Any pictures of this type of turnout? Gary - chilling in Eugene, Oregon http://www.angelfire.com/or/trainguy http://community.webshots.com/user/raltzenthor As a point of interest here some real turnouts used #24 frogs with a lead distance of 185 feet and a radius of 5600 feet! FYI - some of those #24s are high-speed switches, designed for full speed operation. I beleive the freight railroads run through them at 55mph, but on NJ Transit/Amtrak at the Keaney interchange, the passenger trains run thru at about 70+mph. I also believe they have movable frogs. There are 3 pneumatic actuators for the tie rods, and one or two for the frog, which closes to present a continuous rail for the passing track. Pete
Re: Boxpok driver model preview other questions
Over a pint 'r two? The Mick - Original Message - From: James Curry [EMAIL PROTECTED] To: Multiple recipients of sslivesteam [EMAIL PROTECTED] Sent: Wednesday, October 30, 2002 8:18 AM Subject: Re: Boxpok driver model preview other questions I'll have my people contact your people Jim
Re: Boxpok driver model preview other questions
From: James Curry [EMAIL PROTECTED] I'll have my people contact your people Hey Jim, I'm in trouble, I don't HAVE any people! I guess your people will have to talk to Buster!!! I let him handle all of the family's complaints! Keith P.S. To the list, Buster is a refugee from the Dog pound!
RE: Boxpok driver model preview
At 11:01 AM 10/30/02 -0700, you wrote: The drivers are modeled using Solidworks 2003 Ken Nice job. Bring me up to date, can this file then be taken directly to a 3d wax modeling system? hw
RE: Boxpok driver model preview
Harry, Solidwork models can be output in many formats including .stl, which is the most common for use in rapid prototyping and cad/cam applications. I will be doing some research into having the model printed dirctly in wax. I am not sure of the the quality of the surface finish and of the cost of this method. I think it may be more effective to have to CAD model produced using the stero-lithography method which would give me a pattern in a resin material. I would then use that pattern to produce a RTV mold, which then would be used to produce the wax patterns. It's a round-about method but more waxes can be produced from then on. I need to get information on shrinkage rates of the mold material and wax, so I can adjust the CAD model to suit. Ken -Original Message- From: [EMAIL PROTECTED] [mailto:sslivesteam;colegroup.com]On Behalf Of Harry Wade Sent: Wednesday, October 30, 2002 11:27 AM To: Multiple recipients of sslivesteam Subject: RE: Boxpok driver model preview At 11:01 AM 10/30/02 -0700, you wrote: The drivers are modeled using Solidworks 2003 Ken Nice job. Bring me up to date, can this file then be taken directly to a 3d wax modeling system? hw
RE: Boxpok driver model preview
At 12:27 PM 10/30/02 -0700, you wrote: I need to get information on shrinkage rates of the mold material and wax, Ken I've been told it's best to get the final shrink allowance from the people who will do your final molds and waxes. Regards, Harry
Re: Stop me before I make (another) mistake ...
Dave, I have sixteen foot radius curves. I used #8 frog switches. They work out to be about the same curve. I believe that on prototype railroads the max speed through the diverting route is twice the frog # in MPH. So a #12 switch will give you about 24 MPH. That is why they are going to #20 and larger movable frog switches. Robb in Michigan Dave Cole wrote: After drawing an arc for a wide curve (almost 12 feet) on the benchwork and using the bent-stick method of obtaining an easement (transition), I find that the curve appears to be 5 degrees off the tangent.
Re: Boxpok driver model preview
Ken, Nice work. Some of the waxes used in RP can be smoothed with a mist of isopropyl alcohol. That should reduce any of the edge effects caused by the RP process. The problem is that it would leave too smooth of a surface. I've been thinking along the same lines concerning the mastering of patterns. At work we do a considerable amount of brazing and use SolidWorks for all of our CAD work. Our fit tolerances are critical due to the nature of the product we build. Where I am gong with this is that we often run interference checks with the models scaled up to their size at 1000 C. SolidWorks design tables make the job of growing the part relatively easy. I believe SW 2003 has made this even easier by automatically importing all model dimensions to the Excel spreadsheet that drives the design table. Based on the quality of your models I am beginning to think that I may be preaching to the choir at this point... In other words, you're probably already there. I am looking forward to seeing the project as it progresses. Keep us posted. Regards, Michael Martin http://www.panyo.com/steamups (SF Bay Area Steamup Images and Model Engineering)
Re: Stop me before I make (another) mistake. now frogs...
- Gary Just remember that most prototype turnouts above #16 have frogs that close off the unselected route by moving the closure rail against the point. True Jim, These were called spring rail frogs and are in use even on the sharp #7 sidings at the grain bins here in town providing a smooth ride for Amtrak's Coast Starlight. There were also double spring rail frogs that would provide a smooth route both ways. Gary B
