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Alto Pass Hill, the ruling grade on my 'idealized' GM&O has a minimum 26 inch radius 5.0% compensated grade northbound for 70 1:1 scale feet as it travels from the lower to upper deck. Curves are gently eased parabolas with decreasing equivelent radius from 72" to 26" per an old (1960's) Lynn Wescott Formula. (26" is John Armstrong Minimum for passenger train op in HO.) Vertical curves do not exccede 600 scale feet (construction required templates) I am able to haul a 9 foot train uphill with 3 P2K FAs or Athern Fs (but use 4 it looks better). <br />Regarding scenery, since no other tracks are visible I intentionally created an aprox. 2% southbound grade, to lessen the effect of the hill. ( I have also created 'scenic hills using a false ground reference where I needed flat terrain for operating reasons butt wanted to convey a sence of undulating terrain.
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