@M,

New version, the biggest problem is the large walls with such a small model. Needs to be thinner, but I don't think the 1/8 would work very well.

Regards, Larry

Quote from: LarryC on June 21, 2012, 04:28:01 PM
I don't understand why the lift would be less.

Let me think on this.  It may not matter, like you say.  Could be just my mistake!

M.

Quote from: webby1 on June 21, 2012, 05:02:30 PM
may I remind politely.

Hi Tom.  Thanks for the reminder.

I can see how that reply from Mr. Wayne can be interpreted as saying a one layer system can produce OU.  But that was not clear to me.

In the second sentence where he says "if you build your system..." I was unclear if he was still talking about a single layer "system" or talking about a multi layer ZED "system".

So I guess I would need a clarifying statement from Mr. Wayne.

Just a "yes" or "no."  Can the "Travis Effect" be used to show OU in a single layer system (just a cup over a cement block)?

Thanks again,

M.

Quote from: webby1 on June 21, 2012, 03:14:44 PM
IMHO there are 2 effects that need to be demonstrated in a self run mode. 

First is the simple "Travis effect", the one demonstrated in the videos but in a self run mode, if this part is not understood then the next effect will make no sense and appear as "magic".

Second is the nesting of the risers to decrease the input needed and conserve some of the input itself for re-use.

Then when you explain that each riser is the concrete block, from the first demonstration, for the riser above it, it makes more sense, and is easier to understand.

For Travis effect to work you need to have enough space on the sides of a central piece, I think you call it a pod, to accommodate the compressed air. At the same time , in the initial position there shouldn't be any space on top of the pod.
Once there is a bit of lift from the incoming water, air will rise up from the sides to the area between the top of the pod
and the bottom of a riser and lift it.

An observation. If we look again at the videos of the basic Travis effect, we notice that the cup used is tapered, it does not have a uniform diameter all the way up. It appears that the cement block was made by using the cup as a mould. While this is convenient, it does create a problem. As the cup and block are both tapered, as the cup rises, the air gap between the cup walls and the block increases in width.
       In my opinion, the net result off this is that the lift distance of the Travis effect is reduced. I am not saying that the total energy of the lift is reduced. It may be that we get a more powerful lift over a shorter distance .Or not.
      It is interesting to note that the multilayer systems are based on cylinders of uniform diameter, not tapered cylinders.So if you are building a single layer model, it may be best to use a cylinder of uniform diameter . Any comments ?