Rincewind53: Not really the ping pong ball that blew it up, but the shockwave from the barrel.
nmrsnr: Rincewind53: Not really the ping pong ball that blew it up, but the shockwave from the barrel.That's what I was thinking. Could the ping-pong ball even survive the pressure required to launch it at supersonic speeds?Still far cooler than anything I built as a kid.
mr_a: nmrsnr: Rincewind53: Not really the ping pong ball that blew it up, but the shockwave from the barrel.That's what I was thinking. Could the ping-pong ball even survive the pressure required to launch it at supersonic speeds?Still far cooler than anything I built as a kid.Something must have survived-since I assume they had some sort of radar gun set up to measure the velocity. Also, the ping-pong ball must have been reasonably intact when it left the barrel, otherwise I don't see how you would generate enough of a "seal" to get that sort of velocity.My guess is the ball formed a pancake the diameter of the PVC, which hit the melon like a giant slug. But if that is the case, it probably would have slowed down pretty quick due to its shape, so if the melon was a little further away, the damage would have been far less./enough armchair engineeringAnd nice job, men!
Cucullen: Yeah cub scouts didn't design that and buy the high speed camera to film it. Still pretty cool though. Hope they were more involved just watching the thing go off so the nerd scoutmaster could get his project on TV.
quatchi: In b4 Michelle Malkin joke.
StrikitRich: And now Homeland Security has put them all on the No Fly list?
hogans: [i148.photobucket.com image 607x330]Mayor Bates: Daryl, he wouldn't hurt a fly. I know my son, Colonel. He's not the guerrilla type.Colonel Ernesto Bella: According to records, Mayor... your son is a prominent student leader.Mayor Bates: Yes, well... he's a leader, but not in a violent or physical way. You see, Daryl... he's more of a politician, like his father.Colonel Ernesto Bella: A member of an elite paramilitary organization: "Eagle Scouts."Mayor Bates: Yes, but that's not military. If he's alive, he's scared, he's hungry... and he's just as anxious to avoid conflicts as you and me. He's not a troublemaker.Colonel Ernesto Bella: Then who is?Mayor Bates: ...It runs in some of the families.Colonel Ernesto Bella: [to an aide-de-camp] This community is indeed fortunate to have a shepherd like him.Mayor Bates: Well, I just want to see this thing through, Colonel.
Marquis de Sod: That is the gayest thing I've ever seen
MurphyMurphy: I'd love to see the design.
NFA: BOOM headshot!
QFarker: The gun was so close to the melon I bet it would have exploded the melon even without a projectile in the gun. Still cooler than anything we did in scouts.
Meltro: [what-if.xkcd.com image 161x187]
wildcardjack: I'm calling BS to the 880 mph claim.I'd have to break out my old fluid dynamics text to find the equation, but Ernst Mach figured out that it's hard to get gasses to move at supersonic speeds.
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