Originally Posted by Greg Elmassian
How broad is that curve? looks pretty wide, what caused the derailment?
Curves are minimum 10 ft radius - wider at the point of the derailment. The issue is the coach connectors which limit up and down movement between the coaches in the curves which makes them very susceptible to any ups and downs in the track. On a straight piece of track, the couplers are adjusted to give about 1/16 inch between the connectors which gives the streamlined look. But on the curves, they touch on the inside which limits movement.