R3/R4 left curved turnout with a polarized frog.The R3/R4 curved turnout was developed with the same approach as the R1/R2 curved turnout except that it is matched to the R3 and R4 Radius curves and that a curve angle of 30 can be taken into account.The resulting track layout has a considerably closer spacing. Despite this, the space required is still not all that large even on smaller layouts.

Curved turnouts for the R3 and R4 Radius curves.Turnout curve is 30. An electric mechanism can be installed in the turnout.