Marklin 2229 - Curved Circuit Track K-Track R1
Length 1/2 of a Marklin 2221= 15°. Radius 360 mm / 14-3/16". Marklin refers to this as a R1 K-Track curve.
Momentary contact with locomotive/car pickup shoe.
Same length and radius as a Marklin 2223. This means 2 pieces (a Marklin 2223 & 2229) are equal to 30 degrees and would replace a Marklin 2221, and 6 pieces make a quarter circle.