Power Point Presentation by Pykrete Power Point Presentation by Jacob Harris

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<ul><li><p> Pykrete Power Point Presentation by Jacob Harris</p></li><li><p>Certain materials are included under the fair use exemption of the U.S. Copyright Law; Materials are included in accordance with the multimedia fair use guidelines; and Materials are restricted from further use.</p></li><li><p>composite material made of 14% wood pulp and icePykrete is</p></li><li><p>Interesting Properties of PykreteIt has a slow melting rate due to low thermal conductivityIt has an improved strength and toughness over pure ice, it is actually closer to concrete in strengthIt is slightly harder to form than concrete, because it expands while freezing</p></li><li><p>The History of PykreteInvented by Max Perutz??It is named after Geoffrey Pyke. He proposed that the Royal Navy make a huge, unsinkable aircraft carrier using this material during World War II</p></li><li><p>Durability of PykreteA ship made of this material would be unsinkable; torpedoes could hit it and do little damageIt has a crush resistance of greater then 3,000 per square inch, so a one-inch column could support the weight of a typical car The wood pulp in the material makes it extremely stable at high temperaturesIf a .303 caliber bullet is fired at the material, it will penetrate only 6.5 inches</p></li><li><p>Comparison of Ice and PykreteIce-beforeIce-afterPykrete-beforePykrete-afterThese photos were taken on July 22, 2000 by J Gordon HolleyBoth the pykrete and ice were frozen in 1 gallon milk jugs for one week. The pykrete was 10% sawdust by weightBoth were shot with a .243 rifle at 100 meters. A .243 bullet fired form 300 meters can push a 1 lb object for a distance of 1000 feet </p></li><li><p>Sources</p><p>Wikipediahttp://en.wikipedia.org/wiki/Pykrete.htm informationNobelprize.orghttp://nobelprize.org/chemistry/laureates/1962/perutz-bio.htmlImageSWalkhttp://www.swalk.com/habhead.htmlImageGrippy and Cormohttp://www.geocitices.com/Broadway/1928/pykrete.htmImages and information </p></li></ul>