A ship that flips 90 degrees for precise scientific measurements

Post by cr1895 » Wed, Aug 23, 2017, 8:13 PM UTC

jononor wrote: post #59

cr1895 wrote: post #48

Earlier quoted context omitted.

Here's a gif of water particle movement that's happening in an ocean wave (in deep water; it gets weirder if it's shallow). http://funnel.sfsu.edu/courses/gm309/images/Owave.gif Essentially, motion starts with wind. Energy propagates downwards into the water column resulting in the circular orbitals (you see this if you float in the (deep) ocean and you bob up and down in a circle but you don't really go anywhere). B…

I'd expect a stationary submarine to be much more suceptible to rolling? A raised tower or other non-symmetrical features might also cause a bobbing motion in the roll. I'd also expect the submarine to have to adjust its ballast tanks in order to maintain a level buoyancy. When a submarine is moving at cruise speed these things can easily be compensated for by the fins and rudders, but the motors will neccesarily mak…

Post by amelius » Wed, Aug 23, 2017, 8:35 PM UTC

cr1895 wrote: post #71

jononor wrote: post #59

Earlier quoted context omitted.

I'd expect a stationary submarine to be much more suceptible to rolling? A raised tower or other non-symmetrical features might also cause a bobbing motion in the roll. I'd also expect the submarine to have to adjust its ballast tanks in order to maintain a level buoyancy. When a submarine is moving at cruise speed these things can easily be compensated for by the fins and rudders, but the motors will neccesarily mak…

Yeah could be prone to high roll motion depending on the heading relative to the predominant waves. I'm guessing though that for whatever scientific purposes it would be submerged and not rolling/pitching at all.

Post by mseebach » Wed, Aug 23, 2017, 10:33 PM UTC

panic wrote: post #67

nashashmi wrote: post #15

Earlier quoted context omitted.

Because budgets elsewhere are expanding. Interest in science has waned and research in tech has increased. My own field of civil engineering has seen much better days in terms of research and innovation. The field is now seen as ancient and specs are top heavy. Well, the brighter minds have turned to other areas and our field has flatlined.

It's not necessarily about interest. US policy for the past few decades has been to reduce taxes (in 1945 we took 94% from the highest income tax bracket!) and let the private sector decide how to allocate money. Since people spend a lot of money on tech, that's where the money ends up.

Post by SquareBalls » Thu, Aug 24, 2017, 12:18 PM UTC