February 25, 2000
The Lempor Theory
This page provides an on-line version of Ing. L. D. Porta's technical paper describing his Lempor Ejector, written in 1974.. The Lempor Ejector is the most efficient exhaust system for steam locomotives developed so far.
by Ing. Livio Dante Porta
Introductory note by
Corrections to Lempor Theory (added January 2, 2006)
Jos Koopmans supplied the following corrections to the Lempor Theory. These may be typographical errors in transposing the theory from paper to electronic media or they may be errors in the original theory.
1. Fig.1 has D1, W1
near the orifice, should be D , W
Note- as time allows, I will make these changes in the Lempor Theory as hosted on these pages.
An Adobe PDF version of the Lempor Theory may be downloaded here.
Michael Guy has provided a Microsoft Excel spreadsheet for designing a Lempor exhaust system here: http://home.ca.inter.net/~mguy/lempor_ejector_calculator_page.htm
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