Johannes Stumpf eBooks

The Una-Flow Steam-Engine. E-book. Formato PDF Johannes Stumpf   -  Forgotten Books, 2017  - 

The harmful surfaces comprise the inner surfaces of the cylinder and'the inwardly exposed surfaces of piston, piston rod and steam distributing parts. Surfaces which are continually exposed even in the dead center position of the piston may be termed harmful surfaces of the first order, and those which are progressively uncovered by the piston during its motion, harmful surfaces of the second order.