A few thoughts on building materials. For experimentation, a Zed needs to be transparent. After some thought, I feel that the best chance is to build risers and ringwalls from scratch, as this gives a better chance of achieving the ideal hight to diameter ratio. Wayne said that the best compromise is that the average diameter of the risers should be about one third of the hight, so this is relatively tall and thin. A good material for models would be the type of plastic used to make large soft drink bottles, but preferably bought as a flat sheet. Anyone know a source?
      Look on Ebay at "Compass cutters." less than $5. Then all you need is patience and a good glue.

Rideout Plastics sells sheets in .010 and .020 pretty reasonably.
I ordered 3 of my largest tubes from them.
Dale

Having a Zed machine running 2 days instead of 4 hours is not relevant to proves or not OU, then after 2 days someone will ask for 2 weeks.


What is important to know is the reason why it stoped after 4 hours, is it because of a known or suspected hidden source of energy depleted or is it due to a conception problem (like a leak, an equipment failure, an pressure drop, too much friction or whatever else which IS NOT jeoperdizing the perpetual movement of the ZED if adequately corrected even if too costly or to complexe to solve at mrwayne scale.


So, to whoever can answer with certitude, what made the ZED to stop after 4hours?

Quote from: parisd on August 27, 2012, 03:42:59 PM
Having a Zed machine running 2 days instead of 4 hours is not relevant to proves or not OU, then after 2 days someone will ask for 2 weeks.

Hello parisd.  The importance of 48 hours under load is that Mark Dansie thought that amount of time would exhaust all possible sources of potential energy, which would prove that the ZED is a net energy producer.

Of course skeptics will want more right up to the point where they become a commercial reality.  However, Mark Dansie has set this as the hurdle for his team of expert engineers and/or scientists to spend the time and expense to understand and certify its operation.  This would lead to very large investments and commercialization.

Important note for model builders, attached is Wayne's Bag Plumbing picture. Note that the input is reduced by pipe size and gate valve allowing adjustment of the input flow and the larger pipe size outlet flow is unrestricted. Should help with piston return. Check valves are cheap see  http://www.usplastic.com/catalog/default.aspx?catid=489&clickid=redirect

Regards, Larry