Can someone tell me the radius of the curve on a Walthers Shinohara Double Slip.
I am interested in the radius of the curve when moving through the slip from the bottom right to the bottom left (or vice versa) or when moving from the top right to the top left (vice versa).
If you can tell me the radius of the curve on both the #6 and the #8, I would appreciate it.
Rich
Is this code 100? I have an old Lambert catalog that has a lot of dimensions for these double slips, but there is no radius data given. The only dimension they give that even approaches a radius is actually an angle between the diverging frog rails. If this helps you, the angle given for the #6 is 9 degrees 30 minutes. My catalog does not show a #8 slip switch.
Sorry, I should have mentioned that. I need to know the radius of the curve on the Code 83 double slips.
Rich
Rich
It’s unlikely the curve is a constant radius, so measuring what the minimum (assuming that’s what you wanted) radius is on a very short segment is going to be rather difficult with any kind of accuracy. And that assumes that somebody has both size double slips laying around to take the measurement.
The effort to obtain the minimum radius begs the question - what are you going to do with the information you requested? Perhaps there’s an easier way to your ultimate end.
If it’s to determine the size needed for a particular piece of equipment to go through the curve - a #6 turnout to NMRA template has a closure rail radius of about 40". It may be a little bit of a stretch, but I would like to think the curvature on the curved paths of a #6 double slip is not too much sharper than that. Which is to say anything should go through it minimum radius-wise, especially since the minimum radius segments would be very short.
If the information is to determine which size double slip to use, the #8 is going to have a gentler curve, but both will be adequate for most equipment. The #8 also has a shallower angle between the 2 straight routes, with the angle being important as the curve radius in laying out the track either to scale or full size.
My dad did use a code 100 Shinohara double slip (don’t recall what size but likely #6 based on geometry) to connect his main lines to the yard. It was coupled to an Atlas #6 (Atlas never made a #8 in code 100) for the 2nd track of the double track main. I recall that he spent some hours fiddling with it until he could get his steam and full length passenger equipment to use all paths derailment-free. It certainly wasn’t perfect out of the box, but with some tinkering it got pretty close.
FW
Based on a very rough estimate using my model RR cad program, I would guess about 42" for the #6 DS and about 55" for the #8 DS. They are certainly broad curves. I am away from my materials until the end of the week, but if you can wait until then, I will try to check my actual turnouts.
Dante
[quote user=“fwright”]
richhotrain:
If you can tell me the radius of the curve on both the #6 and the #8, I would appreciate it.
Rich
Rich
It’s unlikely the curve is a constant radius, so measuring what the minimum (assuming that’s what you wanted) radius is on a very short segment is going to be rather difficult with any kind of accuracy. And that assumes that somebody has both size double slips laying around to take the measurement.
The effort to obtain the minimum radius begs the question - what are you going to do with the information you requested? Perhaps there’s an easier way to your ultimate end.
If it’s to determine the size needed for a particular piece of equipment to go through the curve - a #6 turnout to NMRA template has a closure rail radius of about 40". It may be a little bit of a stretch, but I would like to think the curvature on the curved paths of a #6 double slip is not too much sharper than that. Which is to say anything should go through it minimum radius-wise, especially since the minimum radius segments would be very short.
If the information is to determine which size double slip to use, the #8 is going to have a gentler curve, but both will be adequate for most equipment. The #8 also has a shallower angle between the 2 straight routes, with the angle being important as the curve radius in laying out the track either to scale or full size.
My dad did use a code 100 Shinohara double slip (don’t recall what size but likely #6 based on geometry) to connect his main lines to the yard. It was coupled to an Atlas #6 (Atlas never made a #8 in code 100) for the 2nd track of the double track main. I recall that he spent some hours fiddling with it until he could get his steam and full length passenger equipm
Dante,
Thanks for that info.
I have always been intrigued by the concept of the double slip, but never having owned one, I remain a little confused about how it actually operates. Let me use an example with the photo that follows.
If I want to cross the double slip from the lower right to the upper left, is it sufficient to set the throwbar on the right to straight through? When I look at the photo, it seems that the setting of the throwbar on the left is irrelevant in that situation. Or, does the throwbar on the left also need to be set for straight through to prevent a derailment?
Rich
Rich, my lone DS switch is in my yard, but it is Fast Tracks, not Walther/Shinohara. Still, they both should be very close to each other in geometry. I can get strings of Walthers Heavyweights through that turnout, and all of my engines. Not a hint of a bind or tightness. A #6 will not present a problem with couplers for you, and you may save the room you need.
The radius mid-DS #6 is near 34".
Crandell
Crandell,
Thanks for that info. I am going to be the proud owner of my first double slip. I gotta solve that tight curve on the two lead tracks and the double slip appears to be the answer.
Rich
Rich,
After I saw your layout, I fiddled with the track some for my own layout. It still doesn’t fit my purpose, but I came up with a good way to save a good foot or more off your original design.
The minimum here is R30. Grid is 12"
DG,
I am confused by your drawing. Tell me more about what you are trying to convey.
Rich
Don,
That is a great yard plan with a lot of flexibility!
Robin
Rich,
This was my variation of your stub ended plan for my layout. (It didn’t quite fit, so I’m not using it.) The difference between yours and mine is my mainline track sweeps upward, while yours sweeps downward.
Bascially you just need to ignore everything south of the throat. That should look famaliar to your plan. The entire yard length from throat to last turnout is ~4’3"
If you can give me the radius of your mainline track, I’m sure I could redraw it for you so that you will understand.
Here’s how I cut down on throat length
#6 to start the crossover, Note how the two #6 turnouts bow outwards at the bottom by 9.5 degrees. This serves to save space and begin a transition curve.
followed by two #6 double slips.
You can get to any of the 6 track leads from any of the two mainline tracks branches. You can still break down and reverse direction, or break down and return in the same direction from which you came.
What’s probably throwing you off is that I have an extra track sweep up on the left side. That allows my engines to escape out to further break down the train, and to perform some switching work with head end cars.
I figured out a way to break down my 15’ train this way and move it into 3 tracks stalls. But the overall plan is just a little too wide with double R30’s
We have a double slip turnout on my club layout going into a yard. It is wired with 2 toggle switches (1 for each side of turnout) and 2 LED lights to show each side of the turnout. Remember there are 2 positions on each side. Honestly when I look at it I can’t tell how it is aligned without the lights.
When it comes time to wire them up Rich (the double slips) write me a note and I’ll show you how to do it.
DG,
Ahh, now I understand your diagram except for one thing. If those two tracks immediately below the double slips are turnouts, how do they connect to the double slips?
I have drawn a crude diagram of my track arrangement. There are 8 stub end platform tracks in the station, plus an outer track on each side which serves as an escape track, so 10 tracks in total.
The entire complex is 4’ x 12’.
The numbers at the end of each stub track ar
Curt,
I blew up a photo of the double slip and printed a hard copy in black and white, then colored in the 8 point rails. But, without actually having the double slip in my hand to operate, it is difficult to visualize the point rail positions for the 8 routes.
I agree that you need lights to indicate and identify the correct positions of the throwbars to determine the 8 valid routes.
The wiring and the lighting will be interesting.
Rich
Thanks, DG, I will take you up on that offer.
Rich
Try this on for size: Minimums are R30 and #6 on the yard.
I must admit I cheated a tiny bit. The turnouts off the main are #5 Walthers. BUT the R Closure is 26, and R-Substituion is 44. So any passenger car should pass through without problems.
DG,
Is that a double crossover below the two double slips?
Rich