1. Chris Treadwell

2. BACKGROUND  Nicolaus Otto first to develop functioning four stroke engine.  German Engineer  Developed 1876

3. THE ENGINE  Similar to modern engines  Single cylinder  Hit-and-miss  Four stoke process  Spark plug ignition  Water jacket for cooling

4. FOUR STROKE CYCLE

5. P-V CYCLE

6. MODERN OTTO ENGINES

8. REFERENCES  Glenn Research Center, http://www.grc.nasa.gov/WWW/K- 12/airplane/Images/otto.gif. http://www.grc.nasa.gov/WWW/K-  Wikipedia, http://en.wikipedia.org/wiki/Nicolaus_Otto.