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Re: Re: Re: Re: Re: Re: Re: Re: O/T for you scienc
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Posted by Steve - IN on November 09, 2003 at 09:26:25 from (12.222.30.13):
In Reply to: Re: Re: Re: Re: Re: Re: Re: O/T for you science bu posted by rhud, fried brain on November 08, 2003 at 19:01:07:
rhud,
Not to worry. I had nothing to do this morning, so went at the numbers a different way -- that is, how high does it have to go with 0 drag to get to something around 3000 fps at the ground. I come up with about 32 miles. Check that number if you will. Anyway, the best round I found in the ballistics tables at www.remington.com was the 300 Rem Ultra Mag which by throwing out my ballistics formula and simply using ft/lbs. of torque versus the 180gr. weight of the round gets to almost 31 miles. No good, still over 100 fps short at the ground. Then I started looking for Mama Deuce 50 cal ballistics, didn't find them, but started thinking of bigger guns. Remember the Paris gun the Germans used in WWI with a 70 mile parabolic range. Then the progressive charge gun they designed to shot in France and hit London. Projected ranged was 140 miles. Then remembered Gerald Bull, and it turns out he actually did it. In Nov. 1966 a ~100 foot long barrel super gun shot a 185lb. Martlett to an altitude of 111 miles. Bingo. It can hit as fast as it left. I take it all back -- it can be done, but not with any ol' rifle you're likely to pull off the rack. I'll do a post about the magic of the Martlett approach at the top. Sorry for makin' your head hurt. Have a good weekend. Steve
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