Collection

1999 Annual Conference

Authors

Clark Colton; Bonnie D. Burrell

means of communication. However, emails and telephone calls will also be utiliud. 2. Coniidentiality should be respected by using common courtesy among team members 3. If a penon is quiet, the other team members should make an earnest effort to solicit his or her opinion on the project.Meetings 1. Weekly hourly meetings should be held in the student center at a time that will be determined during lab or communicated via email. 2. If a person misses a meeting(s) or is consistently late, he or she must see Bo~ie for more team building exercises. 3. Brainstorming will be done in lab or during weekly meetings. 4. Eating during meetings is okay and nobody smokes

Collection

1999 Annual Conference

Authors

Donald V. Richardson

characteristic failure modes began to appear. All high-poweraircraft engines used hollow exhaust valves which were about two thirds filled with sodium.This metal would melt and slosh up and down inside the hollow valve stems and dissipate moreheat up through the valve guides than solid steel valve stems. This practice was proven in thelate 1920's. However, as engines and their valves became larger and rotating speed and combus-tion pressures increased, valve failures became more serious.Cylinder detonation (from whatever cause) stressed these valves and caused them to fail. Theusual failure was that the perimeter weld around the head of the valve would crack and the so-dium would leak out. Then the valve head would turn white hot, which aggravated the