OT. WAY OT, Engineering Problem. Need some help |
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OT. WAY OT, Engineering Problem. Need some help |
jfort |
Aug 27 2008, 10:55 AM
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#1
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Senior Member Group: Members Posts: 1,137 Joined: 5-May 03 From: Findlay, OH Member No.: 652 Region Association: Upper MidWest |
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. |
davep |
Aug 28 2008, 02:41 PM
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#2
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914 Historian Group: Benefactors Posts: 5,156 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
My thought was that spin would help it get past some obstacles.
The vanes should not be designed to extend out past the body. I would have a bulbous nose for low drag, and a sharpened tail with a couple of tiny vanes to add clockwise spin (counter-clockwise below the equator). |
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