Quote from: mondrasek on June 16, 2012, 03:46:07 PM
I see no problem with making everything from acrylic sheet.  But unless you have perfect machining capabilities, a box is the hardest thing to make.

How do you recommend we bond the pieces?  If it is with something "glue like" such as silicone, that may disrupt an individual's ability to see clearly all the operations through multiple layers of acrylic and water.

I had hoped to see something made more like this:  http://www.youtube.com/watch?v=hT6Ow_cBTps

But that is just me.  I would welcome anything that helped others to understand.  I mean, I'm definitely not a teacher, so those who teach should explain what would be the best teaching aid.

The following pretty much covered the issue:
http://www.bit-tech.net/modding/2008/03/14/a_modders_guide_to_acrylic/1

It is easy to get accurate cuts using a compound miter saw or table saw.

Regards, Larry

Quote from: LarryC on June 16, 2012, 04:03:29 PM
It is easy to get accurate cuts using a compound miter saw or table saw.

Yep.  It appears that easy.

M.

@Tom Webb


If the interim risers would not be offering any lift value, what other kind of value would they offer, spacers?


Also, could you provide a diagram of the arrangement you describe in Reply 523?


Thanks

It is good seeing some ideas on the practicality of model building. The square idea is certainly a radical approach."Thinking inside the box?"  It somehow seems a shame that everyday cylinders are being thrown away in the form of empty tin cans. If we could arrive at the ideal proportions and dimensions, either mathematically or with info from mrtravis, then transparency might be less of an issue. We could predict what is happening inside at least in theory. I still think that an animation would be the most cost effective teaching aid. I keep trying to think of an alternative geometry method of making this that is simpler to fabricate.
      I have this sort of half baked idea in my head that most probably wont work but won`t go away . I keep thinking of a fat hose arranged in a sine wave shape and partly filled with water as mrwayne described . At each "positive peak"of the sine wave , where the air is , there is a vent pipe connected to a piston and cylinder [syringe] that lifts a load. Most likely rubbish, but the subconscious is still working on it. A sort of "equivalent circuit" of a ZED...

Quote from: Cisco on June 16, 2012, 04:17:34 PM
If the interim risers would not be offering any lift value, what other kind of value would they offer, spacers?

They increase the head for the large force provided by the most inner riser.

Regards, Larry