HISTORICAL DRAWING · Drawing published 1878
Separate-condenser engine
What shaft power follows from an assumed mean effective pressure?

A contemporary sketch model
Every number below is a modern illustrative assumption. The historical drawing supplies a question; the source model is an exercise in reasoning about it.
pressure = 150 kPa in 100..200 ± 10% "Assumed mean effective pressure"
swept = 0.01 m^3 "Assumed swept volume per working stroke"
strokes = 2 Hz "Power strokes per second, not shaft rpm"
efficiency = 0.8 "Assumed mechanical efficiency"
work := pressure*swept [J]
shaftPower := work*strokes*efficiency [W]
check output: shaftPower >= 2000 W
sweep Pressure: pressure = 100, 150, 200 kPaModel limits
Not a steam cycle or condenser heat-transfer model. Mean effective pressure must come from evidence.
Explore it with your agent
Create a Study, inspect the installed capabilities, and use this source as a starting point. Ask the agent to explain the equations and assumptions, then replace illustrative inputs with measured evidence for your own design.
This example includes a scalar sweep. Use napkin_sketch to add the model and napkin_run to inspect the sweep; the source editor’s scalar comparison view is for simple scenarios.