 OT. WAY OT, Engineering Problem. Need some help |
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| jfort |
 Aug 27 2008, 10:55 AM
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Senior Member  Group: Members Posts: 1,135 Joined: 5-May 03 From: Findlay, OH Member No.: 652 Region Association: Upper MidWest 
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My son and I have a real problem and we need some help. My son is a licensed blaster. He has been asked to stimulate oil wells with dynamite. I am trying to help him. In short, we will fabricate a "torpedo." Currently, we are thinking of using a 5' length of 1.5" PVC with the down end made into a point. The torpedo will be filled with 2 sticks of dynamite and filled with as dense a sand/gravel as we can find. It will be dropped down a 5" pipe filled with water. It is estimated that it is 640' to the bottom. Can you help me calculate how long it will take the torpedo to reach the bottom? (We need to make sure it gets to the bottom before the fuse ignites the dynamite!!) I am sure the efficiency through the water, drag, is an important and not known for sure variable, but perhaps there is a range that would get us close enough.
Any guidance or leads would be most appreciated. |
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Posts in this topic
jfort OT. WAY OT Aug 27 2008, 10:55 AM
ericread I believe you should find all of the necessary doc... Aug 27 2008, 11:21 AM Lavanaut Ooooh fluid dynamics. Going to be very tough to e... Aug 27 2008, 12:25 PM jfort My son is a sophisticated blaster, having done man... Aug 27 2008, 12:41 PM pin31 Check out this web site: http://www.newton.dep.anl... Aug 27 2008, 12:45 PM
Todd Enlund
The fastest (best case scenario) would be droppin... Aug 27 2008, 01:26 PM angerosa Use a 640' fuse and don't worry about it. ... Aug 27 2008, 12:50 PM drgchapman I would be thinking a dry run or three to determin... Aug 27 2008, 12:54 PM pin31 Thanks Todd, you're correct...I used the wrong... Aug 27 2008, 01:44 PM ClayPerrine
Thanks Todd, you're correct...I used the wron... Aug 27 2008, 02:40 PM carr914 Isn't the PVC going to have some bouyancy? Aug 27 2008, 02:56 PM jfort this is what i've come up with thus far, thoug... Aug 27 2008, 02:57 PM jfort right. PVC will have some bouyancy, but i discoun... Aug 27 2008, 03:07 PM Lavanaut No offense, but there are way too many unknowns he... Aug 27 2008, 03:22 PM jfort i forgot to square the PVC cross section area: so... Aug 27 2008, 03:25 PM angerosa
i forgot to square the PVC cross section area: s... Aug 27 2008, 03:47 PM carr914
No offense, but there are way too many unknowns h... Aug 27 2008, 03:29 PM r_towle Have you considered using a large caliber gun inst... Aug 27 2008, 03:58 PM Jeffs9146 Why use free fall numbers?
Well maintenance compa... Aug 27 2008, 04:10 PM Jeffs9146 You could also use a depth guage to set your trigg... Aug 27 2008, 04:20 PM drgchapman OK, after all this mental masterbation, it seems u... Aug 27 2008, 04:34 PM orange914 this looks like a job for mythbusters :D :blowup: Aug 27 2008, 05:10 PM davep I believe that terminal velocity will be reached q... Aug 27 2008, 08:58 PM Todd Enlund
The pipe diameter is sufficiently large that the ... Aug 27 2008, 09:26 PM davep My thought was that spin would help it get past so... Aug 28 2008, 02:41 PM SirAndy
to add clockwise spin (counter-clockwise below th... Aug 28 2008, 04:51 PM Lavanaut
to add clockwise spin (counter-clockwise below t... Aug 29 2008, 12:34 AM hcdmueller Why not use commercially available shock tube as y... Aug 28 2008, 02:58 PM Travisfling This just seems like a crazy question... I think t... Aug 28 2008, 03:07 PM Jeffs9146
Thats what I was talking about earlier!... Aug 28 2008, 03:37 PM ArtechnikA I think I'd put a camera and light source in t... Aug 28 2008, 04:01 PM YksKrad I'm only an engineering student, and an Arch. ... Aug 28 2008, 04:16 PM ArtechnikA
On a side note... Don't they usually pump ste... Aug 28 2008, 04:31 PM YksKrad
On a side note... Don't they usually pump st... Aug 28 2008, 05:12 PM toon1
Why not use commercially available shock tube as ... Aug 28 2008, 05:13 PM hcdmueller
Explosives is how I make a living :D
Me too... Aug 29 2008, 07:09 AM Phoenix-MN In my previous life (job) I worked for a company t... Aug 29 2008, 08:11 AM toon1
Explosives is how I make a living :D
Me to... Aug 29 2008, 09:29 AM  |
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