Greg, there are different ways of measuring. I'll try to explain, put your triangle hat on.....Gavin, please explain how a 1:9 frog in the UK is different from a #9 frog in the USA, here the number is determined by the ratio of run to spread, and a #9 frog is 1:9 here in the US.
Igor, your post says you can do 80 kmh turnouts, from your post this says 1:15... you can do 1:15 in your garden? Or just a few turnouts. I've seen a German made switch in #10 and it is VERY long. What is your calculated length of the turnout in 1:15?
Next time after you've squashed a frog (the real reddit variety, not Kermit, or a turnout one), send up your drone, and take a piccy of it. If you have a nice symmetrical shape, with four legs pointing in the right directions, then score 10 out of ten. If it ain't so pretty, try again.
I intend to use for the garden 150 mm centre to centre.our #15 switch should have about a 3 degree diverging angle... I don't think you could do a crossover in just twice the distance of the switch, with such a small diverging angle. I think you need more distance to get the track to track separation. Where else could you use a #15 and not eat up a lot of space to another track other than a crossover to a parallel track?
I made some things according with and to G1MRA and now i want to be prototypical.One thing I know you have not figured is how difficult it is to make a frog to model railroad standards (G1MRA for example) without having the wheels drop into the throat, since it is so long. One (awful) way is to use wheels of huge tread width. The other way is to make it a flange bearing frog, which I recommend in your case.
Big thumb up, tell more if you want.Greg, there are different ways of measuring. I'll try to explain, put your triangle hat on.....
How we do it, is called the tangent method, where you simply measure your, say, 1 foot spread, at a right angle, then measure back along the rail to the point of frog, A true right angle triangle. Applying the 'solutions' for triangles, 1 divided by 9 gives you a number that is the tan (tangent) of the angle of the frog. Simple, that's why we use it.
Now, the AREA (Americn Railway Engineering Assn.) method involves measuring with two right angles, thus ending up with two triangles.... and in short the tan of two times the half angle, is not the same as the tan of one angle, because tan is not a linear scale. Worth a read up if you are interested, but NEVER trust Wiki.
Of course i will, incl a successful AA20 on them.Please keep us abreast of your efforts to incorporate such a nice switch into your layout and the issues you encounter to make it work well.
Yeah I'll give it a go. I'm surprised this didn't spawn more jokesNext time after you've squashed a frog (the real reddit variety, not Kermit, or a turnout one), send up your drone, and take a piccy of it. If you have a nice symmetrical shape, with four legs pointing in the right directions, then score 10 out of ten. If it ain't so pretty, try again.