As each builder will choose the area of cell that he wants to
build I have not put any thing but generalized data here.
 

Five things are needed:

a. Power Supply
b. Electrolyzer or electrolyzers
c. Bubbler
d. Electroyte
e. Internal Combustion Motor of 4 cycle type.
 

                         Power supply

 1. Build a Power Supply that is able to put out up to 1/2
     Amp per square inch of cell area that you will be using.
 2. Use a Schottky rectifier MBR2545CT or similar on a large
     heat sink.  The MBR2545 is rated at 30 amps at 45 volts.
 3. A good arrangement is a center tapped secondary so two
     diodes can be used. For small systems only one MBR2545 is
     needed as there are two diodes in the package.
 

                         Electrolyzer

 4. The electrolyzer or electrolyzers (Peter Lowrie uses
     three) must have the power input connections on the
     bottom. This is to prevent an explosion if a loose
     connection develops at some later time and sparks.
 5. The entire insides on the electrolyzer must be non
     corrosive material IE stainless steel and plastic.
 6. Magnetic stainless steel is better than nonmagnetic as
     the bubbles do not cling to the surface. I have found
     that the holes in the plates specified by Archie Blue are
     not necessary. Their disadvantage is that they reduce
     cell area. The plates are separated by 1 mm. It is
     essential to have an air inlet, that is directed to go
     between the plates, with a ball valve for air ratio
     control.
 7. All connections and openings must be made gas tight.  I
     use Epoxy where it will not need to be opened and Dow
     Corning 4 compound elsewhere as it allows easy opening.
 8. The last cell may have 8 inches space above the plates
     and be filled 4 inches above the plates. In this case a
     check valve of the gravity type is needed before this
     cell to prevent back flow to the previous cells (all
     spring type check valves are too restrictive to the gas
     flow).  Alternatively the last cell may be placed at a
     lower level to prevent back flow without the check valve.
     Place styrofoam balls in the upper area to suppress
     splashing.

                           Bubbler

  9. Put a bubbler at least 7 inches tall between the
      electrolyser and the motor. It must have the inlet on the
      side and close to bottom and the outlet on a break away
      lid.  Hold the lid down with a spring or bungy cords.
      This protection is needed in case of a backfire.
10. Fill the top half with some styrofoam balls to act as a
       splash suppressor and to reduce gas area.
11. It should be operated 1/2 full of distilled water.
 

                         Electrolyte

12. Potassium Hydroxide is the best electrolyte and is most
      conductive at a concentration of 28%
13. Use only distilled water
14. Maintain the electrolyte at 75 to 85 degrees C.
      I am planning to build a pre heater so that this
      temperature can be reached quickly.
 

                           IC Motor

15. The timing should be advanced 180 degrees plus T.
      Stainless steel valves may or may not be necessary.
16. The entire air intake must come from the output of the
       bubbler. Seal off any other air inputs.
17. Arrange to rout some of the exhaust to the input of the
       intake ball valve to keep the electrolyte warm during
       running.

T equals the time after explosion that the implosion occures.
 

                          (C) 2006
The forgoing is copyrighted by Willard J. Elliott and may not
be reproduced in any form without his express written
permission.