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Unread postAuthor: daniel0663 » Tue Sep 20, 2011 2:48 am

One day, those high tech' metal slab of precise engineering will hit a person/species..... Lets wish it wont hit anyone, or potentially endanger someone. :?

Do you believe in bad luck?... :shock:
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Unread postAuthor: Technician1002 » Tue Sep 20, 2011 2:51 am

Some things like the lottery are purely random (or supposed to be). This is on a path. Those along the path during re-entry have lower odds than I do. It can't land here on the 23rd. It won't be in the area.

If you play the lottery, you have a much higher chance of winning than I do. I don't buy tickets.
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Unread postAuthor: MrCrowley » Tue Sep 20, 2011 2:53 am

jackssmirkingrevenge wrote:That probability seems a bit high, given area of average person vs earth's surface area, and that people are not fixed objects and can be in any number of places at any given time... or is that a 1/3200 chance of landing in a populated area? Still seems a little off.
No idea, apparently NASA calculated it. I leached the figure from the media.

Do you believe in bad luck?

Bad luck/good luck/curses only effect you when you believe in it. You think you're unlucky; you see bad luck in all your actions. Same if you think you're lucky or cursed.

To believe in luck would be like be believing in fate/destiny and a higher power. May as well believe in leprechauns, celestial teapots, invisible dragons and epoxy bat caves*.


Edit: @Tech,

Then I'm sure NASA included that in their equations and also the equation that said a particular person being hit is in the trillions. If you're worried about flying junk that has a 1/1,000,000,000,000 chance of hitting you, I would suggest not living in an urban area. Sure, it's always good to be prepared, but how long does this junk take to reach earth once it begins entering the atmosphere? Minutes (could be much longer if on a pre-planned path, I assume)? If you're in an office building, chances are NASA wont have time to phone every office in the city and let them know some junk is coming their way.


*I just spoiled Christmas for all the little Spudfilers who believe in the Epoxy Bunny


Edit: This is sad, continues the age old history of Italians prosecuting legitimate scientists. I've heard bad stories about Italian authorities who are 'delusional' with certain beliefs that affect their judgement. I'm sure anyone who has looked in to the Amanda Knox case knows what I'm talking about *cough* Giuliano Mignini *cough*.
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 20, 2011 3:57 am

Technician1002 wrote:Those along the path during re-entry have lower odds than I do.


Granted if it is going to fall within a predictable band as opposed to "anywhere on earth" then the odds go up. Of a 3200 mile long strip, it sounds likely that one mile of it will be populated.

In any case, as most of us are going to die of boring cancer and heart diseaseanyway, getting hit by space debris would be an awesome way to go, as long as it doesn't happen when you're too young :)

To believe in luck would be like be believing in fate/destiny and a higher power. May as well believe in leprechauns, celestial teapots, invisible dragons and epoxy bat caves*.


Hear hear. Also flying spaghetti monsters.

*I just spoiled Christmas for all the little Spudfilers who believe in the Epoxy Bunny


Do you think I travel to little children's bedrooms around Easter time and extrude epoxy eggs from one of my orifices :roll:

This is sad, continues the age old history of Italians prosecuting legitimate scientists. I've heard bad stories about Italian authorities who are 'delusional' with certain beliefs that affect their judgement.


That's terrible to read. The proximity of the Vatican is no coincidence.
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Unread postAuthor: Crna Legija » Tue Sep 20, 2011 5:02 am

Today at trade school I filed a 50mmx50mmx25mm block of mild steel down to 45x45x20, it had to be square to 0.02mm. When I final got it right(5hr later) I handed it in the teacher said it was great, He then put it on the bench hit it with a hammer a few times and told we to oil stone the dents out.

FFFFFFFFFFFFFFFFFFFUUUUUUUUUUUUUUUUUUUUUUUU.

BUT i still win because he left and I put it in the surface grinder.
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Unread postAuthor: Zeus » Tue Sep 20, 2011 5:22 am

5 hours to remove that much steel, I guess he had you using dead smooth files :lol:

Good call on the surface grinder, but remember he was teaching you a lesson in patience, wax on, wax off etc...
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/sarcasm, /hyperbole
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Unread postAuthor: Crna Legija » Tue Sep 20, 2011 5:40 am

Zeus wrote:5 hours to remove that much steel, I guess he had you using dead smooth files :lol:

Good call on the surface grinder, but remember he was teaching you a lesson in patience, wax on, wax off etc...


It was a ''second cut file'' and you need to take your time, to get it perfect, you get pretty worn out after that too.
I was lucky it was today because it was only 15* and yesterday was 30*.

do you know the price of .223 round by any chance? my bro has a 22 250 and its like $1.10 a round :shock:
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Unread postAuthor: Zeus » Tue Sep 20, 2011 6:27 am

Fair enough with the 2nd cut, I'd be using a bastard to rough it out then a 2nd cut or finer to finish it.

.223 rem, I'd hazard a guess at 75 cents apiece, I've seen a box of 20 for $15, a Lee Loader is a really worthwhile investment, makes it so much cheaper.

12 gauge shells are $12.50 for 25, might be cheaper to take up clay target.
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/sarcasm, /hyperbole
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Unread postAuthor: Crna Legija » Tue Sep 20, 2011 7:32 am

Zeus wrote:Fair enough with the 2nd cut, I'd be using a bastard to rough it out then a 2nd cut or finer to finish it.

.223 rem, I'd hazard a guess at 75 cents apiece, I've seen a box of 20 for $15, a Lee Loader is a really worthwhile investment, makes it so much cheaper.

12 gauge shells are $12.50 for 25, might be cheaper to take up clay target.


umm still pretty expensive, ill look into reloading my self, we have been getting our uncle to reload the .22-250. I wanna buy a new gun if you didn't notice. Something for roos, deer, feral pig sized animals.

edit: this is what i made when i was 8-9.
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Unread postAuthor: Labtecpower » Tue Sep 20, 2011 7:59 am

I think i'll go the hybrid cartridge route.

A design:

Image

All aluminium, PVC back plug, fill valve as the spark plug.
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Unread postAuthor: mark.f » Tue Sep 20, 2011 8:28 am

MrCrowley wrote:Edit 2:
2007 I made the SGA (first piston cannon)
2008 I made the VAL (better built piston cannon)
2009 I made the M480 (first hybrid)
2010 I made Mjollnir (first piston hybrid)


What happened to the Dam Buster?
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Unread postAuthor: DYI » Tue Sep 20, 2011 8:47 am

Taking a quick look at the Amanda Knox case, I got a good chuckle out of this one. Actually charging the plaintiff with slander strikes me as a fairly elegant approach to drive home the point that you really don't want to deal with these guys, under any circumstances. Surprisingly enough, I've never heard of that being done around here.
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Unread postAuthor: warhead052 » Tue Sep 20, 2011 10:40 am

Crna Legija wrote:do you know the price of .223 round by any chance? my bro has a 22 250 and its like $1.10 a round :shock:


Its some where around $5-$20 per .50 cal here in bama. I would know, I got to shoot a barret on the condition that I bought the ammo.... It was well worth it though.
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 20, 2011 11:47 am

Labtecpower wrote:I think i'll go the hybrid cartridge route.


How very on-topic :)

Size? Burst disk or o-ring seal?
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Unread postAuthor: POLAND_SPUD » Tue Sep 20, 2011 11:56 am

making it "stealthy"
The only large metal part would probably be a gas engine, as batteries are not as efficient as traditional fuel (think about energy density)...

I don't think noise will be a problem - AFAIK it's all about the propeller (and in case of gas engines a muffler)

you can see why they clamped down on this. I digress, don't want to find myself on some watch list
that's why I am surprised... ardupilot pretty much already has all of the features that that guy couldn't do on his own
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