h a l f b a k e r yCall Ambulance, Rebuild Kitchen.
add, search, annotate, link, view, overview, recent, by name, random
news, help, about, links, report a problem
browse anonymously,
or get an account
and write.
register,
|
|
|
|
Having trouble visualising this one. Would you care to do a drawing? |
|
|
I'm not familiar with well digging, but the drilling rig in [jurist]'s link looks identical to [Imathinker]'s description. The Southern Baptists also designed a low cost pump. |
|
|
I don't get how this varies from the link. |
|
|
It uses plastic tube extensions instead of metal, for lightweight, yet long bits. |
|
|
It would lose its effectiveness after a certain depth, since plastics are more susceptible to torsion-related deformation than the iron alloys currently used in drills. |
|
| |