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Rapid and quiet drill
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Chang, Zensheu Badescu, Mircea Bar-Cohen, Yoseph Bao, Xiaoqi Sherrit, Stewart |
| Copyright Year | 2007 |
| Description | This describes aspects of the rapid and quiet drill (RAQD), which is a prototype apparatus for drilling concrete or bricks. The design and basic principle of operation of the RAQD overlap, in several respects, with those of ultrasonic/ sonic drilling and coring apparatuses described in a number of previous NASA Tech Briefs articles. The main difference is that whereas the actuation scheme of the prior apparatuses is partly ultrasonic and partly sonic, the actuation scheme of the RAQD is purely ultrasonic. Hence, even though the RAQD generates considerable sound, it is characterized as quiet because most or all of the sound is above the frequency range of human hearing. |
| File Size | 237317 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100011115 |
| Archival Resource Key | ark:/13960/t2x39rp64 |
| Language | English |
| Publisher Date | 2007-10-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Drilling Concretes Noise Sound Bricks Drills Acoustic Frequencies Frequency Ranges Drill Bits Ntrs Nasa Technical Reports ServerĀ (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |