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Otto Berg's Hypervelocity Impact Experiment

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:3,000.00 - 5,000.00 USD
Otto Berg's Hypervelocity Impact Experiment

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Auction Date:2022 Dec 15 @ 18:00 (UTC-5 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Impressive block of lucite demonstrating the effects of a hypervelocity impact of a micrometeoroid traveling at speeds of about 20,000 feet per second, or five miles per second. The block measures 8Àù x 8Àù x 3Àù and was impacted at the center by a tiny nylon disc (3/8Àù in diameter and 1/32Àù thick, a sample of which is taped to the top) resulting in substantial ballistic damage to the block and a circular spall broken off the back from the ultra high-speed impact. Traveling faster than the speed of sound, the disc precedes the shockwave momentarily and the resulting shock wave and energy from the projectile combine to knock out a spall on the far side. The block is etched in the upper right corner: "4-462." In very good to fine condition, with a chip to one corner of the block and the spall fragment reattached to the back with tape.