The best Papp engine design as follows:
John Rohner overcomplicates his horizontally opposed engine design. Simple is better. And no need for the complexity for a VW 1600 design.
In its simplest form, the combined Papp engine gen set is a cylinder tube with a double faced piston riding inside of it. The faces are located on opposite ends of the piston. This piston has permanent magnets installed near it outer surface. It rides back a forth inside this nonmagnetic tube. The tube is covered with a copper coil wrapped around its outside.
Both ends of the tube contain a spark gap that is fired alternately to push the piston back and forth.
When the piston has moved to the far right the right side spark will fire, the piston will then move to the far left of the tube; Then at that time, the far left spark will fire and so on to and fro in a cycle.

There is no connecting rod attached to the piston.
The piston is free floating on a cushion of hydrogen as described in this video. It is like a bullet in a gun barrel that oscillates from one side of the gun barrel to the other.
https://www.youtube.com/watch?v=bHFUi0F0PgA&feature=related
The back and forth movement in the piston will induce an alternating current in the coil turned around the outside of the tube.
The piston seal does not need to be gas tight because the shock wave from the spark will provide the energy that rocks the piston to and fro.
The tube is hydrogen tight. The only breach in the tube is for hydrogen pressure recharge and seals that provide wire runs for electric power output and spark current input.
John Rohner overcomplicates his horizontally opposed engine design. Simple is better. And no need for the complexity for a VW 1600 design.
In its simplest form, the combined Papp engine gen set is a cylinder tube with a double faced piston riding inside of it. The faces are located on opposite ends of the piston. This piston has permanent magnets installed near it outer surface. It rides back a forth inside this nonmagnetic tube. The tube is covered with a copper coil wrapped around its outside.
Both ends of the tube contain a spark gap that is fired alternately to push the piston back and forth.
When the piston has moved to the far right the right side spark will fire, the piston will then move to the far left of the tube; Then at that time, the far left spark will fire and so on to and fro in a cycle.

There is no connecting rod attached to the piston.
The piston is free floating on a cushion of hydrogen as described in this video. It is like a bullet in a gun barrel that oscillates from one side of the gun barrel to the other.
https://www.youtube.com/watch?v=bHFUi0F0PgA&feature=related
The back and forth movement in the piston will induce an alternating current in the coil turned around the outside of the tube.
The piston seal does not need to be gas tight because the shock wave from the spark will provide the energy that rocks the piston to and fro.
The tube is hydrogen tight. The only breach in the tube is for hydrogen pressure recharge and seals that provide wire runs for electric power output and spark current input.