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| BigGrib |
 Posted: 12/06/2007 2:25 AM Post subject: |
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GribNation Founder
Joined: 01 Oct 2007
Posts: 627
220.47 Spud Bux
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| i think you would need a spring or something to pop those wings open at max height or something |
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| Carlman |
| Posted: 12/06/2007 2:30 AM Post subject: |
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The Aussie
Joined: 24 Nov 2007
Posts: 1171
376.06 Spud Bux
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| rubber band worx aswell as JSR has put in one of the posts on the previous page. |
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| jackssmirkingrevenge |
| Posted: 12/06/2007 3:39 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7098
11428.06 Spud Bux
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| Carlman wrote: | | would it 'glide' and hit slow enough to preserve the camera though? |
It will be a fast glide but if the camera's in a well padded housing it should survive. Of course first I would recommend a few dummy runs with a counterweight in place of the camera, and even before firing a few hand thrown launches to make sure you have the CG right would not go amiss.
| Quote: | | what kind of lab work u in?, ive just finished skwl and am considering lab tech/analysist as a career |
I work in a pharmaceutical lab, we manufacture APIs, so basically I get paid to play with expensive white powder  I would recommend it as a career if you're technically and chemically inclined, certainly beats an office job  |
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| rna_duelers |
| Posted: 12/06/2007 4:33 AM Post subject: |
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Major General
Joined: 26 Sep 2005
Posts: 1641
3118.23 Spud Bux
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It also means that your on a list of "watch" if lots of exotic drugs become available around were you live.
Just shoot and hope for the best! |
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| jackssmirkingrevenge |
| Posted: 12/06/2007 4:36 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7098
11428.06 Spud Bux
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| Highly unlikely anyone would be using what we make recreationally, unless they enjoyed skin rashes and weak bones with no beneficial narcotic effects. |
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| rna_duelers |
| Posted: 12/06/2007 4:39 AM Post subject: |
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Major General
Joined: 26 Sep 2005
Posts: 1641
3118.23 Spud Bux
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| So very true,do you think that the ingredients and time going into making the drugs is worth the amount the companies charge?Because some of my medication is...Well expensive,very expensive. |
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| jackssmirkingrevenge |
| Posted: 12/06/2007 4:54 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7098
11428.06 Spud Bux
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| It's very, very expensive to manufacture, the profit margins aren't that great - aside from patents and licensing, the materials, equipment and facilities are all extremely costly, some of the instruments I use come close to $100,000 and they're just as costly to maintain. When you're talking about people's health, you can't afford to be less than 100% safe with everything you do, and that costs money. |
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| Carlman |
| Posted: 12/07/2007 1:26 AM Post subject: |
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The Aussie
Joined: 24 Nov 2007
Posts: 1171
376.06 Spud Bux
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yes i will definetly do a test run or 20 lol
just had a brainwave, what if the chute was ejected via the force of a mini combustion inside the projectile activated from a mercury switch?
yea ill be thinking more into that career mite hav a few Qs sumtime aswell if thts all good. |
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| jackssmirkingrevenge |
| Posted: 12/07/2007 1:36 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7098
11428.06 Spud Bux
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| Quote: | | just had a brainwave, what if the chute was ejected via the force of a mini combustion inside the projectile activated from a mercury switch? |
That sounds like a plan, if you're willing to pack stungun/camera flash electronics into your projectile. Another (lighter, cheaper) idea would be to use a model rocket ingitor in the middle of your fuel/air mix. |
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| Carlman |
| Posted: 12/07/2007 1:53 AM Post subject: |
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The Aussie
Joined: 24 Nov 2007
Posts: 1171
376.06 Spud Bux
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| how about a bit of steel wool between two screws conected to a mercury switch and a 9v battery?? |
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| jackssmirkingrevenge |
| Posted: 12/07/2007 1:59 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7098
11428.06 Spud Bux
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| Just as good, even better if you tape a match head to it, and I'll stop there as this forum does not allow discussions about solid propellant. |
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| Carlman |
| Posted: 12/07/2007 2:02 AM Post subject: |
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The Aussie
Joined: 24 Nov 2007
Posts: 1171
376.06 Spud Bux
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| its all good thn just gotta get the time 2 make 1 now |
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| jimmy101 |
| Posted: 12/07/2007 11:15 AM Post subject: |
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Major General
Joined: 28 Mar 2007
Posts: 1780
7550.13 Spud Bux
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| BigGrib wrote: | | Quote: |
Jack, you would be surprised, water rockets typically pull 100~200 G's at launch. I looked it up and Estes rockets only do 10~30 G's.
A 300 FPS spud gun with a 3' barrel has an average accelation of about 470g. A lot more than an Estes rocket but not that much more than a water rocket (only a factor of 3 or so ). |
umm check on page 2 of this thread, because i did the math at 300 fps and a 3' barrel and it's almost twice as much coming in at 928.57 g's |
ummm, I think you made an error in your math. The acceleration is gross estimate is ~470 Gs.
Accelerating from 0 to 300 FPS and assuming constant acceleration means the average velocity in the barrel is 150 FPS.
Time to travel 3' at 150 FPS is 0.02 seconds.
Acceleration = dV/dT = 300 FPS/0.02 seconds = 15,000 FPSS.
G=32 FPSS so 15,000 FPSS/32 FPSS = 470 G. |
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| jimmy101 |
| Posted: 12/07/2007 12:12 PM Post subject: |
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Major General
Joined: 28 Mar 2007
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| BigGrib |
| Posted: 12/07/2007 14:24 PM Post subject: |
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GribNation Founder
Joined: 01 Oct 2007
Posts: 627
220.47 Spud Bux
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| Hey Thanks for going over and correcting everyone and I'm sure that NASA did know about water rockets and I think it was a smart ass coment that JSR wrote. And 928.57 g's sounds more impressive. oh yeah and since you can't tell a smart ass comment when you see one, THIS IS ONE OF THEM. |
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