Robert F. Bourque, Ph. D., P.E.
Bourque Engineering LLC
Los Alamos, New Mexico USA
bob@rfbourque.net
505-412-0194

The Bourque Steam Engine

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Chapter

Title

1

Background

2

Motivations For This Engine

3

Requirements and Constraints

4

Progress

5

Prototype Development

6

Description of the Bourque Cycle

7

Features of the Cycle

8

The Complexity Issue

9

Fuel Requirements

10

First Example Engine in a Vehicle

11

Description of the Expander

12

Expander Hot Cylinder Lubrication

13

Expander Piston Structural Analysis

14

Two More Engine and Vehicle Examples

15

Other Engine Components

16

Materials

17

Safety

18

Water Freezing

19

Control System

20

Starting Time

21

Summary

 

Acknowledgments

 

Some Unit Conversions

 

Notes and References

A Compact Pollution-Free
External Combustion Engine
with High Part-Load Efficiency

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5. Prototype Development

An operating prototype has not been built. That is the current objective. The rest of this paper describes the considerable analytical and design work that has been done. This provides the extensive foundation needed for a minimum risk, successful prototype.

The prototype development will be deliberately methodical with no crash programs or corner-cutting that could cause errors. Each development task and expenditure will require successful completion of the prior task. The first task will be some inexpensive tests described in Chapter 12 below. This will be followed by one or two bench-tests of small, low-power (50-90 hp) engines. After that comes a test of an engine (possible from the bench test) in a vehicle. All this work will be done with minimum publicity until confidence is high that the engine will be successful, especially with respect to the small details.

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