The three arbors of a normal Cornish engine conform to SEX! - Steam at the top, Equilibrium in the middle and Exhaust at the bottom. This engine is different - the Steam arbor is at the bottom, the Exhaust in the middle and the Equilibrium at the top - i.e. EXS.
This photograph is by simonrail and was uploaded September 28th 2017. © simonrail please do not copy or distribute without prior express permission.
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