|"Evening Star" pounds up the 1 in 50 reverse curves with an easy 7 coaches.|
Note that in the first two pictures, the engines are leaning towards the inside of the curve. This is not due to a sloping camera; the track is banked on the curves (I think the correct term is "supelevated") by up to 1mm. During tracklaying, a narrow strip of 1mm thick neoprene rubber is placed under the sleepers at the outside rail, with a transition through 0.5mm to none at all at the end of each curve and where the curve reverses. Those of you with a firm grasp of elementary geometry will already have calculated that the trains lean by up to 3.5 degrees (nominally) from the vertical.
The 1mm maximum was not arrived at scientifically; It is within the range said to be used in the real world of 12" to the foot scale, for which a 6" maximum difference is often stated. And it looks about right at low to medium speeds.
|4F 44417 coasts down the hill with a local train, as "Evening Star" thunders up.|
|A short local train coasts past the quarry, slowing for the station.|
I think that "Evening Star" must take priority for a gentle weathering, to lessen the appearance of having just left the sales showroom.