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Dale Detrich                     Attica, OH                 djdtrh@cros.net

CO2 Type Mini Engine,  2.5 bore X .25 stroke  9/23/2003

The CO2 engine that I built is a modified version of David Kerzel's V1..Some of the changes to the engine are as follows...bigger air inlet , bigger ball valve, larger and more exhaust ports, stainless crank and piston, cast iron cylinder, and double row ball bearings for the crank support.....one more thing that I did was to install a magnet in the design on the front of the flywheel , if you want to check the speed of the engine with a hall effect pickup tach...All of the materials were from the "scrap" box,  the double row ball bearings were "salvaged" from a throw away VCR .....It was fun to build, and a challenge to build size "2" parts with a bunch of size "10" fingers.........Dale Detrich 


 

 

Just about finished with the engine...Still need to work the pin length down, I made it long to start...finished up the mechanical work tonight, still need to "fool" around with it.....
Time to get back to the "real" world, and get back to work on the horz. opposed twin engine.........Dale

 

 

I have a magnet hidden in the flywheel design to use for a tach pickup.....You can see the shavings in the one spot.......


 

  

Spanner holes are also the crankcase vents.......

 

Note from when this engine was being built.

Hello. Guys...I was digging in my trash bucket, and look what I found...I found enough "stuff" to get this far with my copy of David's air engine....No it has not run yet, but it has a good chance to be OK....About all that there is to do yet is to make the flywheel, assemble and (fire up) NO I guess that this is one engine that I will have to BLOW up......
 

Valve Seat, ball, and Head.

  A piece of German cast iron cylinder, and hold down rods (screws)......

  Screw in back plate 

  2 double row ball bearings, stainless crank, and a die pin crank pin..

 

  A bit of .500 key stock......... 

 

  9/22/2003   Some more pictures of the 1/4 X1/4 engine...Not finished yet, need to finish the flywheel and head.........


 

Copyright 2003,  Florida Association of Model Engineers and engine builder as noted above, All rights reserved.