Reverse loop using R1 curves and point

P

Portsladepete

Registered
2 Jun 2020
91
66
England
I am planning for next year!! I want to have a reverse loop using only R1 curves and short radius points, due to lack of space mainly. My plan is to have the point on the end of the right hand siding, with the loop either in the space between the far left siding on the grass, or alternatively in the space where you can see a broom handle (hopefully), I can’t work out how many curves I would need, or how they would match up to the point, (assume left hand).
I downloaded Anyrail, to my laptop, which decided to throw a wobbly, yesterday, so now only have iPad,so can’t use any track planning software, so am asking if any kind soul could advise.
 

Attachments

korm kormsen

korm kormsen

Registered
24 Oct 2009
2,549
eleven R1 and three straights. (for the shortest version) lefthand point, 2 R1 left, 9 R1 right, 3 straight, back into point.
or nine R1 but then seven or eight straights. lefthand point, 1 R1, 2 straight, 8 R1, 5 or 6 straight, back to point.
 
Last edited:
Gavin Sowry

Gavin Sowry

Garden Railroader and Raconteur
27 Oct 2009
6,505
66
Hutt Valley, NZ
The neat thing about LGB geometry, is its consistency, and logic.
The curved road of an R1 is exactly the same shape as an R1 curve, and they both curve 30°. 3xR1, and you have turned 90°. 6xR1 and that's 180°. There are 360° in a circle, 12 R1s...starting to get the picture.
You'll need 3 straight. Assume, for this exercise, that the point is running South to North. LH R1, and you have turned 30°, add two R1 curves (left), and you have gone 90°, and are 600mm North of your start, and offset to the left by 600mm. Now, add six R1 to the right (half a circle) and you are still offset by 600mm, but now another 1200mm north of the start. Add the final 3 R1s, and that brings you back to dead straight south-north (in line with the turnout) and 1200mm from the 'start'. That's 4 x standard straight, but you already have 300mm in the straight track of the turnout, so you only need 3 straights to join up. If you want to use track power, then you need some insulated joints.
 
Last edited:
P

Portsladepete

Registered
2 Jun 2020
91
66
England
Thanks to you both, my brain doesn’t allow such clarity:wasntme:! Would these take up much more than the 4 feet diameter of a standard r1 circle? I can start the loop earlier if need be, the right hand siding is made up of two large diameter Aristocraft curves, I think 10ft diameter, I’ve had them for about 20 years and have forgotten what they actually are. Very grateful for your time.
 
SevenOfDiamonds

SevenOfDiamonds

Registered
3 Jan 2010
142
We like pictures here!

(Edit: original version was on a 300x300mm grid. Now placed on a "one foot" grid, which might be more helpful)

1596181530993.png


All the best

David
 
Last edited:
dunnyrail

dunnyrail

DOGS, Garden Railways, Steam Trains, Jive Dancing,
25 Oct 2009
17,541
72
St.Neots Cambridgeshire UK
So here is another one just created from the LGB Track Planning Template, no clever computer stuff round here. Only thing I am not sure about is the grid squares, according to the template they are a Metre I do not believe that the squares are a that big more like 18inches.
E8B47680-87AC-415F-90DA-6F902FA1BD7F.jpeg
 
ebay mike

ebay mike

Retired, but still hoarding. (GOF)
6 Dec 2011
3,180
Norfolk - edge of nowhere.
I am planning for next year!! I want to have a reverse loop using only R1 curves and short radius points, due to lack of space mainly. My plan is to have the point on the end of the right hand siding, with the loop either in the space between the far left siding on the grass, or alternatively in the space where you can see a broom handle (hopefully), I can’t work out how many curves I would need, or how they would match up to the point, (assume left hand).
I downloaded Anyrail, to my laptop, which decided to throw a wobbly, yesterday, so now only have iPad,so can’t use any track planning software, so am asking if any kind soul could advise.
Conversation started Pete.
 
P

Portsladepete

Registered
2 Jun 2020
91
66
England
So here is another one just created from the LGB Track Planning Template, no clever computer stuff round here. Only thing I am not sure about is the grid squares, according to the template they are a Metre I do not believe that the squares are a that big more like 18inches.
View attachment 270874
Very grateful, you’re all so helpful:)