February 10th, 2012 03:39 PM
February 10th, 2012 04:02 PM
Nah. Moonians live on the moon and shoot at earth.
Don't we already have those in our airports here on Earth harassing people and selling flowers?
You are thinking of Moonies.Moonies are bald, wear pinkish robes,dance alot and are crazy.
Lots of difference there...
I would rather stand against the cannons of the wicked than against the prayers of the righteous.
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February 10th, 2012 04:23 PM
And are pacifists
Originally Posted by HotGuns
February 10th, 2012 07:31 PM
February 10th, 2012 07:34 PM
Well if that's the way they behave, it's a good thing they are pacifists!
Originally Posted by suntzu
I'm too young to be this old!
Getting old isn't good for you!
February 10th, 2012 08:23 PM
It would actually be somewhat less than Lunar escape velocity because that is for a non-return to free space. The effect of Earth's gravity field in that direction would lower the speed needed, but probably not anywhere near enough to make a difference.
If you could shoot a round fast enough, the path would be a complex double reverse spiral with a multiple day transit time. Groupings would be pretty poor I suspect.
February 10th, 2012 10:20 PM
the path would be a complex double reverse spiral with a multiple day transit time. Yeah...that's exactly what I was just thinking - whatever it was that you just said.
February 10th, 2012 11:01 PM
A cool read is project HARP (high altitude research project), basically in the 60's a team attempted to shoot a projectile into orbit. Using a 16 inch gun they were able shoot a projectile 3600 m/s. That's roughly 10,800 fps. In 1966 at the Yuma AZ proving grounds they launched a projectile 180km high, which is the record that still stands today.
This was found on Wikipedia, but with further research looks legit.
I think that would beat the moons gravitational pull.
"Brilliant. So now we got a huge guy theory, and a serial crusher theory. Top notch. What's your name?" - Paul Smecker
February 10th, 2012 11:17 PM
Now we know why those nerds chose propellant instead of projectiles.
February 11th, 2012 09:41 AM
I remember an NRA article from years & years ago they stated that a 150 grain .30 caliber bullet if fired on the surface of the moon would travel 179 miles.
Edit: That was at 2700 FPS
Last edited by grouse; February 11th, 2012 at 11:32 AM.
February 11th, 2012 10:29 AM
Actually that is the easiest part, gunpowder and a lot of other propellants contain an oxidizer so that is not a major problem.
Originally Posted by OPFOR
The rest of the questions get into a lot of orbital dynamics that is "above my pay grade". At Goddard we have a whole bunch of PhD's to do that stuff for us! If your bullet did achieve the lunar escape velocity, Kentucky Windage would probably be an understatement!
EOD - Initial success or total failure
February 11th, 2012 10:44 AM
There are (I think) areas in our solar system where gravity is pretty much cancelled out buy the competing gravitational forces. There is an area between the Sun and Earth the orbital dynamics folks refer to as "L1" (don't know why) where they have "parked" some of the solar research observatories.
Originally Posted by Tangle
EOD - Initial success or total failure
February 11th, 2012 10:48 AM
So answer me this...wouldn't a projectile that has a velocity of say 3000 fps here on earth, have a higher velocity on the moon, given the lighter gravitational pull?
Disclaimer: I am not a scientist, but I have watched many Bela Lugosi movies in my youth.
Never pick a fight with an old man...If he's too old to fight, he'll just kill you - John Steinbeck
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February 11th, 2012 10:51 AM
Minuteman Mark IV. Check out the velocity on that puppy. 15,000 miles per hour. You can do the conversion from mph to fps. Yes, that is 15,000 mph.
Originally Posted by RKflorida
February 11th, 2012 11:12 AM
Can you imagine how many rounds it would take to zero in a rifle with that range?
Originally Posted by grouse
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