This was my first attempt at building this device. When I began construction of it, accurate details on how it should be built were very scanty and there was much incorrect information floating around. Since then I have visited David in person and have talked to others who also have had contact with David and the information content is much better, hence my newer versions. This version was not a success though much about the construction issues was learned. The DeviceFull front view of 45 gallon drum experiment. Note the plunger mount and plunger sitting on top of the drum. Normally the plunger mount would be clamped onto the rim of the drum.
Close up showing the plunger lowered into the drum. The top cone's center magnet can be seen below the plunger magnet. They repel each other.
Even better view of plunger and top cone's magnet.
Plunger mount and plunger.
Top cone, without skin. The measuring tape is for scale.
Top cone, closeup, showing construction details.
Bottom cone without skin.
Bottom cone. Closeup showing details of notch which top cone sits in. The notch was drilled and carved into the top of the screw, then 2 hex nuts were added, the top nut providing extra security in case the top cone decides to jump up out of the notch.
Looking down inside of drum - Plunger mount and plunger have been removed for better view. Notice the gap between the cones' rim magnets and the rings of magnets on the drum wall. The rings of magnets on the wall repel the magnets on the rims of the cones. This holds the cones centered but also allows them to wobble when downward/sideways pressure is put on the top cone's center magnet by use of the plunger. Note that the bottom piece on which the bottom cone sits has been replaced by an oscillator.
Looking down inside of drum - Top cone has been removed so that bottom cone is more visible. Note that the bottom piece on which the bottom cone sits has been replaced by an oscillator.
Looking down inside of drum - All cones removed for better view of drum interior. Note that this picture is a little out of date as the complicated looking thing at the bottom has been replaced with an oscillator. This complicated looking thing is simply a stack of conviently sized wood, duct taped together to get the proper height. On the top center of all this wood is a piece of aluminum with a notch cut into it.
Closeup of rings of magnets in drum. The top two rings repel the top cone's rim magnets. The bottom ring repels the bottom cone's rim magnets. (the drum has two grooves in it, one of them is visible between the top rings and the bottom ring).
Closeup inside drum where point of bottom cone sits in notch. This picture is up to date as the notch is actually a part of the oscialltor.
View inside drum of bottom plate of oscillator - The pool balls are visible in the three corners.
View inside drum of complete oscillator - The rectangle at the center is the piece of aluminum with the notch. It is this notch which the bottom cone sits in.
ConclusionAt this scale, it seems fairly easy to make a cone stand upright on a point. Problems
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