a) model trains generally do not work well through S-bends. Buffers get hooked on each others, couplings come apart, etc.
b) models running through such curves do not 'look right'. This is because in real life, train tracks seldom go along wavy lines. Train tracks go as straight as possible. Only in mountainous situations where constructing straight tracks involve massive expenses of building bridges and tunnels would curves be common.
I decided it may be useful to create a page showing the alternative to the very common design error, so here it is.
The following images are constructed using the Märklin C-Track magnetic design kit (item 02409). I do not use C-Track myself and I do not know how comprehensive the track parts are, so the following images are designed to show the principle of the design tip. There may be better options than the one shown here.
Here is the type of design one often sees, bringing a mainline track into a station and splitting each track into two or more sidings:
Notice how both tracks turn both right and left to get into or out of the outer sidings. This is an S-bend and will look poor.
Here is the approach I recommend instead:
Items to note:
- No more S-Bends
- Both mainline curves use the larger radius curve - which also looks better
- The straight part of the sidings are longer!
- The approaching tracks do have some additional space between the tracks, but the 'bad' version also has this dead space, just not between the mainline tracks.