The object of this study was to apply the technique of synthesis to the design of a small power saw. The study produced experimental data on optimum chain speeds, engine vibrations, noise levels, and heat transfer coefficients for reciprocating cylinder heads, and led to a simple free-piston configuration in which a piston oscillated between a mixture of air and fuel in one end of a closed cylinder and a spring in the other. The feasibility of developing the configuration into a practical reciprocating engine was verified by designing,
building and testing a prototype.
The prototype incorporated such novel features as instant, effortless starting and stopping, automatic throttling,
self-cooling, compression ignition of a carbureted air-fuel mixture, and a balanced engine. Uncontrolled ignition timing reduced engine efficiency, and the lack of inertia made engine stalling easy and carburetor adjustment difficult.
The computed results suggest that a developed 3 lb free-piston power saw will produce 1.0 hp at 6,400 cpm and have a specific fuel consumption of .9 lb/shp-hr. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/34895 |
| Date | January 1970 |
| Creators | Fandrich, Helmut Edward |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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