Discussion in 'Science, Tech, & Space Exploration' started by Toroid, Feb 12, 2018.
Does a projectile traveling that fast break the sound barrier?
I worded the last post poorly. I meant would those projectiles create a sonic boom?
Anything traveling faster than the speed of sound creates a continuous wake, so yes, anyone standing behind the traveling object can potentially hear a boom if they are in its wake.... the target will not hear it coming, which is a real advantage of flying above Mach 1.
First read about mass drivers in Popular Science in the '70s. Using the Moon and it's resources to build ships in deep space to explore the Solar system makes sense. But as human beings we would naturally consider it's potential to kill one another with.
I imagine something like that would be hypersonic and would impact long before a sonic boom or any other noise would arrive. Probably makes a series of sonic booms but that might not be noticed. People in London during the Blitz would say they could hear the V1s coming (which is why they were called buzz bombs) and knew that when the motor cut out they were about to hit. Low & slow. Propeller driven fighters could catch them and hit them with their wingtips to destabilize them. The V2s actually made a suborbital hop very much like Alan Shepherd would eventually do. Witnesses said that you heard nothing until the warhead impacted.
Navy rail guns are the only example I can think of that are examples of 'mass driver.' Maybe maglev trains would be also? Never gave them much thought but it sounds similar.
In context, go grab a .30-06 hunting rifle. It'll fire a 150 grain projectile roughly 3000 fps. A pound is 7000 grains.
US Navy ships aren't primarily gunfighters anymore but the standard 5" deck gun in use for years would fire about a 30 pound projectile at roughly the same speed.
The rail guns they're producing are taking a projectile of roughly the same size and sending it along at 8200 fps. In technical terms that's 'shit-hot'.
USA Electromagnetic Rail Gun Proposal - NavWeaps
Astronaut Aboard ISS Snaps Amazing Picture of Soyuz Rocket Launch - Coast to Coast AM
New device aboard the ISS will turn waste material into 3D-printable bioink | Daily Mail Online
I am waiting for the zero gravity toilet.
That's a thing...
To The Stars Academy: Investigating the Unexplained
I dunno, that sort of thing can be tricky...
Is this a bunch of crap?
Here's why NASA wants astronauts to bake cookies in space
Pre WW2 American S and even R boats - submarines - were called pigboats or sugarboats.
No fancy potty there - pails.
The International Space Station may get a new lease on life
New, Emotionally Intelligent Robot CIMON 2 Heads to Space Station | Space
What's going to happen to the first CIMON?...Ejected to become space debris?...lol
He's probably been demoted to housekeeping.
Finally they're working on important stuff.
Dragon soars on research and resupply flight to International Space Station – Spaceflight Now
I caught the ISS tonight.
NASA launches 8,000-pound Cygnus capsule filled with supplies including manchego cheese, chocolate, fresh fruit, and candy to satisfy cravings of three astronauts stationed on the ISS
A cargo ship rocketed toward the International Space Station on Saturday, carrying candy and cheese to satisfy the astronauts' cravings. Northrop Grumman launched its Cygnus capsule from the Virginia seashore at 3.21pm and the nearly 4-ton (8,000-pound) shipment - containing more than 7,500 pounds of science and research, crew supplies and vehicle hardware to the orbital laboratory and its crew - should arrive Tuesday. Besides the usual experiments and gear, the capsule holds cheddar and manchego cheeses, fresh fruit and vegetables, chocolate and three kinds of gummy candy expressly requested by the three station astronauts: Skittles, Hot Tamales, and Mike and Ike's.
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