Phil Perry Posted November 27, 2019 Author Posted November 27, 2019 The fastest man made object isn't a hypersonic jet or spacecraft, but a large manhole cover.... When the US started doing underground nuclear testing, nobody really knew what would happen. One test bomb was placed at the bottom of a 485-foot deep shaft on July 26, 1957, and someone thought it was a good idea to put a half-ton iron manhole cover on top to contain the explosion. The bomb turned the shaft into the world's largest Roman candle, and the manhole cover was nowhere to be found. Robert Brownlee, an astrophysicist who designed the test, wanted to repeat the experiment with high-speed cameras so he could figure out what happened to the cover. So another experiment was created, this time 500-feet deep, and a similar half-ton manhole cover was placed on top. On August 27, 1957, they detonated the bomb. The high-speed cameras barely caught a view of the cover as it left the top of the shaft and headed into oblivion. Brownlee used the frames to calculate the speed to be more than 125,000 miles per hour.... more than five times the escape velocity required to overcome Earth Gravitation. This made it the fastest man-made object in history. Physicists have debated the whereabouts of the two manhole covers ever since. Recently, with the help of supercomputers and a lot more scientific knowledge, physicists are certain that they wouldn't have had time to burn up completely before exiting the atmosphere. This would suggest that both of the remaining manhole pieces would have passed Pluto's orbit sometime around 1961 and are way beyond the edge of the solar system by now. ? Just some random trivia for a Wednesday evening. [ATTACH]50453._xfImport[/ATTACH]
old man emu Posted December 4, 2019 Posted December 4, 2019 Have you heard that in the next Star Wars movie, Jabba the Hutt will be reprising his role? He's a bit older, and a bit bulkier. Now he's known as Jabba the Californian Bungalow.
nomadpete Posted December 13, 2019 Posted December 13, 2019 You're onto some good stuff now, Peter. Thanks. Is this called 'data mining?' Keep on digging.
Phil Perry Posted December 17, 2019 Author Posted December 17, 2019 My name is Phil and I am a Looong time radio Ham. [ATTACH]50493._xfImport[/ATTACH] And YES.. . my Wife hates me.
nomadpete Posted December 17, 2019 Posted December 17, 2019 Couldn't you be happy with just one of everything?
pmccarthy Posted December 18, 2019 Posted December 18, 2019 As far as we know, Phil has only one wife.
old man emu Posted December 18, 2019 Posted December 18, 2019 Did you ever meet a Jewish Ham? Ham was the second son of Noah. Is that Jewish enough?
facthunter Posted December 18, 2019 Posted December 18, 2019 Ha. The origin of Boat People problems. They didn't take two of every fish or oyster or sea horse. Microbes or viruses either. Nev
red750 Posted December 18, 2019 Posted December 18, 2019 We constantly knock the press, especially on the other forum, but you have to hand it to them they are good for a laugh. [ATTACH]50498._xfImport[/ATTACH] [ATTACH]50499._xfImport[/ATTACH] There are more for later.....
red750 Posted December 18, 2019 Posted December 18, 2019 [ATTACH]50500._xfImport[/ATTACH] [ATTACH]50501._xfImport[/ATTACH] [ATTACH]50502._xfImport[/ATTACH]
red750 Posted December 18, 2019 Posted December 18, 2019 [ATTACH]50503._xfImport[/ATTACH] [ATTACH]50504._xfImport[/ATTACH] [ATTACH]50505._xfImport[/ATTACH]
Phil Perry Posted December 18, 2019 Author Posted December 18, 2019 AND Your callsign is ?. G1 spacesailor G4 OHK Old man QSL ? ( EX : VK3 NAY / VK3 ZAU / VK3 DAZ / VK4 YC )
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