berkeman's latest activity

Hand calculating this problem takes several steps. Here is how I would do it. 1) The thin parts are doing all of the deflecting, so...

You do not tell us what your analysis is trying to find out. Are you looking for deflection, deflected shape, strain, stress, or what...

Energy requirements to do what? Please define exactly and quantitatively what you want to do. Thanks.

Here is a video. The water might not be all that deep, but still.

Yep, I was thinking paddle tires too. Although I would probably be too chicken to try it on my CRF450 with rear paddle tire from my...

Is your goal to maximize the rise vertically out of the water for a tethered vehicle, or to maximize the speed of a water vehicle?

Do you know what the tread pattern profile looks like on those vehicles mentioned that do this in competitions? Or do I need to find...

That would be definitely the situation when the boat is tethered to the dock. The paddles are pumping water away from a static location...

Why are the fin thingies facing backwards instead of forwards for the wheel rotation? That seems like the fins will just slip in the...

I get the feeling that when travelling, your wheels as shown have top-spin, which will tend to pull the wheels downwards and stick to...

She mainly knows about the fire at home (at our old apartment years ago), and we laugh about it now. It involved a HAM radio project...

Can you explain what you mean by "(t)he system quantum state is conserved" and in what sense "photons are compressible"?

I've only started one fire at work and one fire working on a persona project at home, so I think that's a pretty good record. :wink...

Hah! Nicely spotted! I hoped someone would notice! It's specifically for putting out electrical fires! :woot: Although as long as I'm...